Víctor Cerdà

Víctor Cerdà
University of the Balearic Islands | UIB · Department of Chemistry

Prof. Dr

About

1,496
Publications
182,789
Reads
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12,608
Citations
Citations since 2017
83 Research Items
5102 Citations
20172018201920202021202220230200400600800
20172018201920202021202220230200400600800
20172018201920202021202220230200400600800
20172018201920202021202220230200400600800
Additional affiliations
January 2012 - present
Université Abdelmalek Essaâdi
Education
January 1971 - November 1973
University of Barcelona
Field of study
  • Analytical Chemistry
October 1966 - September 1970
University of Barcelona
Field of study
  • Chemistry

Publications

Publications (1,496)
Article
Full-text available
The development of a portable device created by 3D printing for colorimetric and fluorometric measurements is an efficient tool for analytical applications in situ or in the laboratory presenting a wide field of applications in the environmental and food field. This device uses a light-emitting diode (LED) as radiation source and a webcam as a dete...
Article
Full-text available
Lab-in-syringe is a new approach for the integration of various analytical extraction steps inside a syringe. Fully automated dispersive liquid–liquid microextraction is carried out in-syringe using a very simple instrumental setup. Dispersion is achieved by aspiration of the organic phase and then the watery phase into the syringe as rapidly as po...
Article
In this work, a review of different methods used for the simultaneous determination of several components through spectrophotometric and fluorimetric measurements is carried out including derivative methods. Several methods are described, like multilinear regression analysis and partial least squares, as well as some other for non-linear systems, l...
Article
This work proposes an automated strategy for the inorganic selenium speciation in infusion tea samples, employing an MSFIA-CVG-AFS system and sodium tetrahydroborate for chemical vapor generation. The selenium total is determined after an online prereduction step of selenium(VI) to selenium(IV) in alkaline media, using a UV reactor with a 15W Hg la...
Article
A simple one-step drawing for the cost-effective fabrication of microfluidic paper-based analytical devices (µPADs) for the determination of phosphate content in water and fertilizer samples is presented in this paper. The hydrophobic barrier of µPAD was patterned using a 2-mm tip marker pen using a transparent acrylic sheet template. The molybdenu...
Article
This paper presents a discussion involving practical aspects of applying contamination indices and ecological risk factors derived from chemical elements in the environmental assessment of soils and sediments. The single and integrated indices: Geoaccumulation index (Igeo), Enrichment factor, Contamination factor (CF), Pollution Index (PI), Ecologi...
Article
A lab-in-syringe flow system exploiting dispersive liquid-liquid micro-extraction in a solvent lighter than water is proposed for the spectrophotometric determination of lead in industrial residual waters. The steps inherent to both liquid-liquid extraction and monitoring of the formed compound are in-syringe carried out. The classical carbon tetra...
Article
The aim of this work is to revise some programs, which are used to obtain accurate equilibrium constants using several chained programs. For this purpose, the AutoAnalysis software is very useful to perform the experimental work, including potentiometric titrations. The POTENtit program allows detecting some problems in the data obtained with AutoA...
Article
Full-text available
A very simple, fast and non-chromatographic methodology for inorganic antimony speciation based on Multisyringe Flow Injection Analysis (MSFIA) employing online hydride generation (HG) ICP-MS was developed. The fully automated analysis is performed in two steps: firstly, Sb(III) is quantified by ICP-MS after chemical vapor generation; then, total a...
Article
The inorganic selenium speciation analysis by non-chromatographic methods using atomic fluorescence spectrometry with chemical vapor generation (CVG-AFS) involves the determination of total selenium and Se(IV). Quantification of Se(VI) concentration is obtained by the difference between the total selenium and Se(IV) concentrations. However, the det...
Article
Sample preparation is a critical step in analytical chemistry, particularly in the consideration of analytes of interest from complex matrices. Due to this complexity, the presence of interferences and low concentrations of the analytes, direct analysis of matrices is not possible in most cases. So, to address this, sample preparation is necessary...
Article
Full-text available
In this work, a flow-based spectrofluorimetric method for iodine determination was developed. The system consisted of a miniaturized chip-based flow manifold for solutions handling and with integrated spectrofluorimetric detection. A multi-syringe module was used as a liquid driver. Iodide was quantified from its catalytic effect on the redox react...
Chapter
The variety of flavonoids in nature, besides their numerous bioactivities in human and animal bodies, where they cannot be synthesized biologically, have increased the attention of scientists to include them in a suitable form to facilitate their consumption by humans and animals. Many products have been continuously found to serve these substances...
Article
Full-text available
Recently, the value of wood residues has received increasing attention due to the presence of pharmacologically active compounds. In the present study, apple bark was treated with subcritical water (SWE) with the aim of bioactivity determination and chemical analysis by GC–MS applying two different sample preparation protocols and by HPLC. Extracts...
Article
In this paper, a field-deployable method for the spectrophotometric determination of iron after a simple preconcentration procedure in column is proposed. A 3D-printed portable system, housing a small spectrophotometer with a CCD detector and a LED as homemade light source is used for spectrophotometric detection. The entire system is powered throu...
Article
In this work, the use of a multisyringe flow injection analysis coupled to hydride generation atomic fluorescence spectrometry (MSFIA-HG-AFS) for inorganic selenium chemical speciation was proposed. A Doehlert design was applied to optimize the experimental conditions for hydride generation (NaBH4 and HCl concentrations). The limits of quantificati...
Article
Long-chain fatty acids (LCFA) are commonly found in lipid-rich wastewaters and are a key factor to monitor the anaerobic digesters. A new simple, fast, precise, and suitable method for routine analysis of LCFA is proposed. The system involves in-syringe-magnetic stirring-assisted dispersive liquid-liquid microextraction (DLLME) prior to gas chromat...
Article
A 3D printed disc coated with C18 resin was developed and used in a flow system coupled to high-performance liquid chromatography (HPLC) with diode array detection (DAD), for the extraction, separation and quantification of six flavonoids: naringin, naringenin, hesperidin, hesperetin, diosmetin and tangeretin in the citrus external peel. The develo...
Article
The program WinMLR has been developed to quantify sorbic and benzoic acids in soft drinks, fruit juices, and soy sauce by making a multilinear regression treatment of experimental data to a linear combination of standard signals. The spectra of sorbic and benzoic acid and samples were obtained from a conventional spectrophotometer, which has been s...
Article
Volatile fatty acids (VFAs) are key parameters to monitor anaerobic digestion processes. Thus, a fast, simple and precise determination of these analytes is necessary for a timely characterization of the biological processes present in municipal solid waste and wastewater treatment plants. In this work, an automated method for the extraction and pr...
Article
This work presents a simple, low cost, and portable spectrophotometer based on a digital microscope as a detector for the determination of the antioxidant activity and total phenolic content (TPC). The antioxidant activity was expressed as ascorbic acid equivalents (AAE) using the 2,2-diphenyl-1-picrylhydrazyl radical (DPPH) assay. The TPC value wa...
Article
Flavonoids are generalized, broad-spectrum, healthy substances that naturally exist in the plant kingdom. The great need for flavonoid consumption leads to finding new sample pretreatments and analytical methods for their determination at different sources and in continuous product development. Sample pretreatment is the stage that consumes more ti...
Article
Full-text available
A new design of a membraneless vaporization (MBL-VP) unit coupled with a specific flow system is presented for the determination of arsenic at trace levels using a hydride generation process. The MBL-VP unit contains two concentric conical reservoirs, with the outer cone selected as the donor reservoir. The volume of the outer donor reservoir is th...
Article
Wet and dry aerosol deposition samples were collected from September 2010 to August 2012 at a remote background site in the Mallorca Isle (Western Mediterranean). Ions and major and trace elements were determined in soluble and insoluble fractions. Temporal variations of chemical components are discussed and interpreted. The overall pattern associa...
Article
The determination of vitamin E as chemical marker in Spirulina platensis hydroalcoholic extracts and creams is reported by the use of high-performance liquid chromatography (HPLC) and multi-syringe chromatography (MSC). The validation of the HPLC method using a methanol as the mobile phase showed linearity (r = 0.9994), a quantification limit of 1....
Article
A new automated system based on a multi-pumping flow system (MPFS) for the spectrophotometric determination of total iron in various wine samples is presented. This analytical protocol is based on the complex formation between Fe (II) and 2-(5-bromo-2-pyridylazo)-5-(diethylamino)-phenol (Br-PADAP). The addition of ascorbic acid allows the determina...
Article
A Multi-Syringe Flow Injection Analysis (MSFIA) fluorometric system based on a 3D printing device hosting a CCD detector has been designed for the determination of quinine in soft drinks. A LED controlled by an electronic circuit was used as a radiation source. The entire system is connected to two USB outputs of a computer. The AutoAnalysis progra...
Article
In this work, the application of Doehlert design for the optimisation aiming the determination of As and Sb in gouache and tempera children's paints, using multi-syringe flow injection analysis (MSFIA)...
Article
A simple, cheap and portable spectrophotometric system is described. It is based on the use of a cheap digital microscope housed from a 3D printed device which simultaneously supports a LED as a light source and a flow cell. A simple electronic device to power the LED is also described using electronic smd components. Both the digital microscope an...
Article
In this paper a new flow‐through cell for voltammetric determinations using screen printed electrodes is described. This cell is much simpler than one with similar performances described in a previous work. This new flow‐through cell has been coupled to a multisyringe flow injection system (MSFIA) and to a multiport selection valve allowing the onl...
Article
The present study discloses the results of a comprehensive 3-years campaign (2010-2012) of air pollution measurements over an regional island background area (Can Llompart-Balearic Islands, Spain), contextualized with other measurements in the western Mediterranean region. Gaseous pollutants and particulate matter fractions were measured in real ti...
Article
Full-text available
The program WinMLR has been developed for the quantification of mixtures of several components by making a multilinear regression treatment of experimental data to a linear combination of standard signals. Data may be obtained with any multichannel detector having more measuring channels than components to be resolved. For a correct resolution, a l...
Article
A fully automatic multisyringe flow injection analysis - lab on valve system (MSFIA-LOV) with assisted automatic stirring for Pb (II) determination exploiting a long path-length liquid waveguide capillary cell (LWCC) for spectrophotometric detection was developed. On-line extraction of lead was performed inside of a microcolumn using a selective so...
Article
In recent years, the discharge of estrogens into the environmental water bodies through the effluents of sewage treatment plants is an issue of increasing concern, since they can act as endocrine-disrupting compounds. For this reason, there is a need of developing selective, sensitive and environmentally friendly methodologies for their determinati...
Article
The aim of this paper is to describe the implementation of the REVIRA program in Spain, with a description of the elements that have to be determined within this. Radiochemical analyses are increasingly demanded in routine laboratories for monitoring radionuclides from environmental samples, nuclear power plants, water treatment plants, nuclear med...
Article
This paper presents a fast and automatic flow-based method to extract 131I from biological samples and hospital waste, previous to liquid scintillation detection. 131I is a radionuclide extensively used in Nuclear Medicine due to their beta and gamma disintegrations, whereby hospitals have to manage the associated waste generation. The automatic de...
Article
The development of a simple and economical spectrophotometric system based on the use of a device created by 3D printing and the electronics necessary to control the intensity of the radiation source was described. The measurements are made with a low-cost digital webcam. The entire system is only powered through the USB outputs of a computer, whic...
Article
The spectrophotometric determination of uranium (VI) has been developed using 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (Br-PADAP). This reaction has been adapted to apply a multisyringe flow injection analysis (MSFIA) system with spectrophotometric detection. The ternary complex of uranium (VI)-(Br-PADAP)-F has been measured at 578 nm. The pro...
Article
An on-line lab-on-valve system for renewable micro-solid phase extraction coupled with high performance liquid chromatography with photodiode array detection was developed for the determination of hesperidin and diosmin in natural and commercial citrus samples. The method is based on the automatic loading of 8 mL of sample into the C18 resin, follo...
Article
Strategies to incorporate porous coatings on 3D printed devices with intricate geometries are critical to expanding the scope of application of this type of manufacturing technique. Herein, the preparation of metal–organic framework (MOF)/polymer dispersions to be applied as coatings for 3D printed devices is described. As a proof of concept, submi...
Article
A 3D printed solid-phase extraction (SPE)device for uranium(VI)extraction has been fabricated using stereolithographic 3D printing. The 3D printed device is shaped as a stirred reactor chamber containing a network of small cubes, which were impregnated with TEVA resin for the extraction of U(VI)from water matrices without doing any previous pretrea...
Article
Post-curing is essential to improve the mechanical properties of 3D printed parts fabricated by stereolithography (SLA), since right after 3D printing they remain in a “green state”. It means that the 3D printed parts have reached their final shape, but the polymerization reaction has not been yet completed. Herein, we take advantage of the tacky p...
Article
Full-text available
A method using high-performance liquid chromatography with diode array detection (HPLC-DAD) as a powerful separation technique has been developed for the simultaneous determination of the four flavonols rutin, quercetin, kaempferol and isorhamnetin in food supplements and pharmaceutical formulations. The chromatographic separation was achieved in 3...
Article
Full-text available
Metal–organic frameworks (MOFs) are porous crystalline materials with large surface areas, uniform pore size, and tunable selectivity. In the last few years, the number of analytical applications of MOFs has been growing constantly. However, the direct use of as-synthesized MOFs in packed column format is rather limited for analytical separations b...
Article
A conductometric system with a multipumping module and a gas-diffusion cell has been developed to determine free and total sulfur dioxide (SO2) in wine. The developed method has two protocols to determine both types of SO2 using the same system. For free SO2, sulfite is converted to H2SO4 by acidification and diffusion with H2O2 in an acceptor chan...
Conference Paper
Full-text available
An on-line lab-on-valve system for renewable micro-solid phase extraction coupled with high performance liquid chromatography with photodiode array detection has been developed for the determination of hesperidin and diosmin in natural and commercial citrus samples. The method is based on the automatic loading of 8 mL of sample into the C18 resin,...
Article
Laser-based stereolithography (SLA) 3D printing has been applied to construct a 3D printed device as support for uranium(VI) extraction, using a quaternary ammonium salt in liquid and solid form. As proof of concept, a simple process was carried out to immobilize a selective and commercial resin (TEVA resin), in all the surface area of the non-cure...
Article
Subcritical water extracts of chokeberry (Aronia melanocarpa) stems were chemically and biologically characterised. Chemical profile was defined by GC–MS analysis whereas anti-oxidant, anti-diabetic and tyrosinase-inhibitory activities of the extracts were investigated by in vitro assays. Antioxidant activity assays revealed strong activity against...
Article
In this work, we present a method for the clean-up, preconcentration and quantification of the four most widely found estrogens (estrone E1, estradiol E2, estriol E3 and ethynyl estradiol EE2) in seawater samples. A sequential injection analysis-lab on valve system (SIA-LOV) has been developed to perform the microsolid phase extraction (µSPE) of th...
Article
This work review shows a description of non-chromatographic and chromatographic procedures proposed for speciation analysis of antimony employing hydride generation (HG) coupled to atomic fluorescence spectrometry (AFS) in environmental matrices, including details of HG-AFS as the detection technique. Non-chromatographic procedures have been develo...
Article
This work presents a multisyringe flow injection analysis (MSFIA) system for the automatic spectrophotometric determination of total iron in wine. The reaction is based on the complexation of Fe(II) with 2-(5-bromo-2-pyridylazo)-5-(diethylamino)-phenol (Br-PADAP). Ascorbic acid was used as reducing reagent for Fe(III) to Fe(II) and, in this way, to...
Article
Automated flow-based solid-phase extraction (SPE) is an advantageous tool for analytical sample pretreatment, and the development of novel materials and fabrication techniques to build improved SPE devices are crucial to further advance the field. Additive manufacturing (3D printing) is offering tremendous advantages in comparison with conventional...
Article
A two-step ZnO nanoparticle-directed method has been implemented to prepare polymer monolith/zeolitic imidazolate framework (ZIF) solid-phase microextraction (SPME) fiber coatings with hierarchical micro-meso-macroporosity. The polymer/ZIF monolith was prepared on the surface of a stainless steel wire from a polymerization mixture containing disper...
Article
In this work, the dispersive liquid-liquid microextraction technique based on the solidification of the organic phase (DLLME-SFO) has been automated for the first time. DLLME-SFO is automated by hyphenating a sequential injection analysis (SIA) system with a custom-made robotic phase separator. Automated in-syringe DLLME is followed by phase separa...
Article
Quite often one of the biggest problems in analytical methods, including spectrometry, resides in the pre-processing of the sample, which usually must be solved manually. To solve these problems, it can be very useful to request the help of the flow techniques, which will allow to automate the methods, decrease the time of the analysis, decrease th...
Article
A simple potentiometric chip-based multipumping flow system (MPFS) has been developed for the simultaneous determination of fluoride, chloride, pH, and redox potential in water samples. The proposed system was developed by using a poly(methyl methacrylate) chip microfluidic-conductor using the advantages of flow techniques with potentiometric detec...
Article
A 3D printed device for the fully automated disk-based solid-phase extraction (SPE) of Cr (VI) from water samples has been fabricated. The compatibility of the use of organic solvents for analyte elution with 3D printed flow devices based on polymers fabricated using stereolithograph y has been evaluated. The developed methodology comprises the com...
Article
Cherry stems have been used in traditional medicine mostly for the treatment of urinary tract infections. Extraction with subcritical water, according to its selectivity, efficiency and other aspects, differs substantially from conventional extraction techniques. The complexity of plant subcritical water extracts is due to the ability of subcritica...
Article
Full-text available
The application of layered double hydroxide-Al2O3-polymer mixed-matrix disks for solid-phase extraction is reported for the first time. Al2O3 is embedded in a polymer matrix followed by an in situ metal-exchange process to obtain a layered double hydroxide-Al2O3-mixed-matrix disk with excellent flow-through properties. The extraction performance of...
Article
This work presents the advantages, drawbacks and performances of Multisyringe Flow Injection Analysis (MSFIA) systems in the determination of metals, metalloids, organic and inorganic compounds in several kind of samples employing spectroanalytical techniques. General topics, as multisyringe description, software and comparison between MSFIA and ot...
Article
Full-text available
An on line, fast, simple, selective and sensitive method has been developed for the determination of three herbicides belonging to the following families: triazines (atrazine), chloroacetamide (alachlor) and phenoxy (2,4-dichlorophenoxyacetic acid) in water samples. The method involves an in-syringe magnetic stirring-assisted dispersive liquid–liqu...
Article
BACKGROUND Sweet cherries (Prunus avium L.) and sour cherries (Prunus cerasus L.) contain substantial amounts of anthocyanins and polyphenolics, and their stems have been used in traditional medicine for centuries. However, comparative data on the composition of sweet and sour cherry stems using the same analytical methodologies are limited. Moreov...
Article
This review provides an update on the implementation of emerging materials as sorbents for sample preparation in combination with chromatographic separation. We have focused on recent applications of metal–organic frameworks, layered double hydroxides, porous carbons obtained from polymers or biomass precursors, and silicates (clays and zeolites)....
Article
Use of membraneless vaporization (MBL-VP) unit with two cone-shaped reservoirs is presented for on-line separation and detection of non-volatile species. A flow system comprising two sets of MBL-VP units with a single in-house capacitively coupled contactless conductivity detector (C4D) was developed for dual determination of ammonium and sulfide i...
Article
Kinetic methods have been widely used in analytical chemistry, generally using spectrophotometric or electrochemical detector. However, although enthalpimetric methods have been scarcely used, they may offer some interesting performances, like to be blind to the color and/or turbidity of the samples. This paper will be related with the description...
Article
The development of advanced manufacturing techniques is crucial for the design of novel analytical tools with unprecedented features. Advanced manufacturing, also known as 3D printing, has been explored for the first time to fabricate modular devices with integrated features for disk-based automated solid-phase extraction (SPE). A modular device in...
Article
Leached fractions of U and Th from different environmental solid matrices were evaluated by an automatic system enabling the on-line lixiviation and extraction/pre-concentration of these two elements previous ICP-MS detection. UTEVA resin was used as selective extraction material. Ten leached fraction, using artificial rainwater (pH 5.4) as leachin...
Conference Paper
Full-text available
The aim of this study was to develop a fully automated method, based on lab-on-valve solid phase extraction (LOV-SPE) of two flavonoids: hesperidin and diosmin present in citrus juices. For this purpose, a micro a C18 column, coupled to high-performance liquid chromatography (HPLC) with photo diode array detection (DAD) was used. Several important...
Article
(99)Tc is an artificial beta emitter widely used in nuclear medicine for diagnostic tests. A fully automated and rapid system for 99Tc monitoring is introduced with the aim to improve hospital residues management. This system can also be helpful to control urban wastewater. Figures of merit similar to those obtained with liquid scintillation counti...
Conference Paper
Full-text available
Flavonoids have important biological activities, such as antioxidant properties, and a wide spectrum of antimicrobial and pharmacological activities. Furthermore, several epidemiological studies indicate an inverse association between the intake of flavonoids and the risk of cardiovascular diseases and different types of cancer. Numerous nutraceuti...
Article
A new method for the separation and determination of four flavonoids: hesperidin (HES), diosmin (DIO), hesperitin (HTIN), and diosmetin (DTIN) in pure form and pharmaceutical formulations has been developed by using high performance liquid chromatography (HPLC) with UV-DAD detection. Multivariate statistics (2k full factorial and Box Behnken Design...
Article
Full-text available
The determination of iron and copper exploiting a microsequential injection lab-on-valve system with online spectrophotometric detection is described. A new, environmental friendly 3-hydroxy-4-pyridinone chelator, functionalized with a polyethylene glycol chain (MRB12) to improve water solubility, was used for iron determination. For copper determi...
Article
Magnetic solid-phase extraction (MSPE) is a useful sample preparation technique, enabling the dispersion of solid sorbents in liquid sample matrices followed by the magnetic retrieval of the sorbent. MSPE can be implemented using any kind of magnetic materials independently of their size and shape, and is a powerful tool for the application of micr...
Article
Kinetic-catalytic analytical methods have proved to be very easy and highly sensitive strategies for chemical analysis, that rely on simple instrumentation [1,2]. Molecular absorption spectrophotometry is commonly used as the detection technique. However, other detection systems, like electrochemical or thermometric ones, offer some interesting pos...
Article
The release of ²²⁶Ra from phosphogypsum (PG) was evaluated by developing a novel tool for fully automated ²²⁶Ra lixiviation from PG integrating extraction/pre-concentration using a renewable sorbent format. Eight leached fractions (30 mL each one) and a residual fraction were analyzed allowing the evaluation of dynamic lixiviation of ²²⁶Ra. An auto...
Article
We present for the first time the application of metal-organic framework (MOF) mixed-matrix disks (MMD) for the automated flow-through solid-phase extraction (SPE) of environmental pollutants. Zirconium terephthalate UiO-66 and UiO-66-NH2 MOFs with different size (90, 200 and 300 nm) have been incorporated into mechanically stable polyvinylidene di...
Article
A miniaturized automatic sample pre-treatment system, based on multicommutated flow techniques, i.e. Lab on Valve (LOV) and Multisyringe Flow Injection Analysis (MSFIA) techniques, for cadmium determination by ICP-MS in organic samples is presented. The on-line extraction and preconcentration system retains the analyte on the resin (Dowex 50W-X8),...
Article
Full-text available
A two-step nanoparticle-directed route for the preparation of macroporous polymer monoliths which pore surface is covered with a metal-organic framework (MOF) coating has been developed to facilitate the use of MOFs in flow-based applications. The flow-through monolithic matrix was prepared in a column format from a polymerization mixture containin...