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Publications (78)
Zusammenfassung
Referenzmaterialien sind entscheidend für die Qualitätssicherung von Laboratorien. Diese nutzen Referenzmaterialien unter anderem zur Validierung von Messverfahren und zur Kalibrierung von Geräten. Dabei ist zu beachten, dass zertifizierte Merkmalswerte stets eine gewisse Unsicherheit aufweisen. Die Ermittlung dieser Unsicherheitsbe...
In this study, we demonstrate the applicability of nitrogen microwave inductively coupled atmospheric pressure mass spectrometry (MICAP-MS) for Ca, Fe, and Se quantification in human serum using isotope dilution (ID) analysis. The matrix tolerance of MICAP-MS in Na matrix was investigated, revealing that high Na levels can suppress the signal inten...
The statistical tool eCerto was developed for the evaluation of measurement data to assign property values and associated uncertainties of reference materials. The analysis is based on collaborative studies of expert laboratories and was implemented using the R software environment. Emphasis was put on comparability of eCerto with SoftCRM, a statis...
Lanthanide-based, spectrally shifting, and multi-color luminescent upconverting nanoparticles (UCNPs) have received much attention in the last decades because of their applicability as reporter for bioimaging, super-resolution microscopy, and sensing as well as barcoding and anti-counterfeiting tags. A prerequisite for the broad application of UCNP...
Main text
The CCQM-K173 Assay of Sodium Carbonate key comparison was jointly organized by the Inorganic Analysis (IAWG) and Electrochemical Analysis and Classical Chemical Methods (EAWG) working groups of CCQM to test the abilities of the national metrology institutes (NMIs) to measure the purity or amount content of solid bases. They are important...
This work aimed to evaluate high-resolution continuum source molecular absorption spectrometry (HR-CS MAS), traditionally used to determine non-metals, for the determination of a new element, metal, vanadium. The VO was...
We investigated the performance of nitrogen microwave inductively coupled atmospheric-pressure plasma mass spectrometry (MICAP-MS) under matrix effects and its applicability for trace elemental analysis in steels. Influences of different gas...
For more than 110 years, BAM has been producing reference materials for a wide range of application fields. With the development of new analytical methods and new applications as well as continuously emerging more stringent requirements of laboratory accreditation with regard to quality control and metrological traceability, the demand and requirem...
In this study, we employed nitrogen microwave inductively coupled atmospheric-pressure plasma (MICAP) combined with quadrupole mass spectrometry (MS) and a liquid sample introduction system to analyze heavy metals in soils.
Nur mit Referenzmaterialien lässt sich überprüfen, ob Analysenmethoden zuverlässig und Messergebnisse richtig sind. Die Nachfrage nach Materialien mit zertifizierten Gehalten an Kohlenstoff, Schwermetallen oder anderen Analyten steigt. Eine Ursache: neue Grenzwerte und auch Reach.
The therapeutic dose of lithium (Li) compounds, which are widely used for the treatment of psychiatric and hematologic disorders, is close to its toxic level; therefore, drug monitoring protocols are mandatory. Herein, we propose a fast, simple, and low-cost analytical procedure for the traceable determination of Li concentration in human serum, ba...
Despite considerable advances in synthesizing high-quality core/shell upconversion (UC) nanocrystals (NC; UCNC) and UCNC photophysics, the application of near-infrared (NIR)-excitable lanthanide-doped UCNC in the life and material sciences is still hampered by the relatively low upconversion luminescence (UCL) of UCNC of small size or thin protecti...
Zearalenone (ZEN), an estrogenic mycotoxin produced by several species of Fusarium fungi, is a common contaminant of cereal-based food worldwide. Due to frequent occurrences associated with high levels of ZEN, maize oil is a particular source of exposure. Although a European maximum level for ZEN in maize oil exists according to Commission Regulati...
High-resolution continuum source graphite furnace molecular absorption spectrometry (HR-CS-GF-MAS) was employed for determining adsorbable organic chlorine (AOCl) in water. Organic chlorine was indirectly quantified by monitoring the molecular absorption of the transient aluminum monochloride molecule (AlCl) around a wavelength of 261.42 nm in a gr...
An alternative method for lithium isotope amount ratio analysis based on a combination of high-resolution atomic absorption spectrometry and spectral data analysis by machine learning (ML) is proposed herein. It is based on the well-known isotope shift of approximately 15 pm for the electronic transition 22P←22S at around the wavelength of 670.8 nm...
Undetected and undesired microstructural variations in components produced by laser powder bed fusion are a major challenge, especially for safety-critical components. In this study, an in-depth analysis of the microstructural features of 316L specimens produced by laser powder bed fusion at different levels of volumetric energy density and differe...
A Correction to this paper has been published: https://doi.org/10.1007/s00216-021-03428-y
p>The therapeutic dose of lithium (Li) compounds, which are widely used for the treatment of psychiatric and hematologic disorders, is close to its toxic level; therefore, drug monitoring protocols are mandatory. Herein, we propose a fast, simple, and low-cost analytical procedure for the traceable determination of Li concentration in human serum,...
a>An alternative method for lithium isotope amount ratio analysis based on a combination of high-resolution atomic absorption spectrometry and spectral data analysis by machine learning (ML) is proposed herein. It is based on the well-known isotope shift of approximately 15 pm for the electronic transition 2<sup>2</sup>P←2<sup>2</sup>S at around th...
A method, based on electrothermal vaporization (ETV) coupled to inductively coupled plasma optical emission spectrometry (ICP OES), has been optimized for direct solid sampling analysis of soda-lime glass—the most common...
Since 1 January 2019 a maximum content of 0.6 mg kg−1 cadmium (Cd) in cocoa powder sold to the final consumer or as an ingredient in sweetened cocoa powder sold to the final consumer (drinking chocolate) is set by the Commission Regulation (EU) No. 488/2014. Monitoring compliance with the specified limit value requires analytical measuring methods...
A fast and simple method for sulfur quantification in crude oils was developed by using high-resolution continuum source graphite furnace molecular absorption spectrometry (HR-CS-GFMAS). For this, heavy crude oil samples were prepared as microemulsion (shake) and injected into a graphite furnace (shut). Finally, the concentration of sulfur was dete...
The mechanism of action of zirconium permanent modifiers on graphite surfaces was investigated in order to understand its influence on the analytical signal in atomic and molecular absorption spectrometry (AAS/MAS)....
Boron isotope amount ratios n(¹⁰B)/n(¹¹B) have been determined by monitoring the absorption spectrum of boron monohydride (BH) in a graphite furnace using high-resolution continuum source molecular absorption spectrometry (HR-CS-MAS). Bands (0 → 0) and (1 → 1) for the electronic transition X¹Σ⁺ → A¹Π were evaluated around wavelengths 433.1 nm and 4...
Under the auspices of the Organic Analysis Working Group (OAWG) of the Comité Consultatif pour la Quantité de Matière (CCQM) a key comparison, CCQM K55.c, was coordinated by the Bureau International des Poids et Mesures (BIPM) in 2012. Twenty National Measurement Institutes or Designated Institutes and the BIPM participated. Participants were requi...
A 9Be-solution has been chemically prepared from phenakite (Be2SiO4) mineral grains as commercial 9Be-solutions are too high in long-lived 10Be. The solution is intended to be used as a carrier for radiochemical separation of 10Be to be measured by accelerator mass spectrometry (AMS). Thus, accurate data of the 9Be-concentration of this solution is...
The objective of this work was to provide updated information on the development of the potential impact of heavy metal containing batteries on municipal waste and battery recycling processes following transposition of the new EU Batteries Directive 2006/66/EC. A representative sample of 146 different types of commercially available dry and button...
The unique optical properties, such as size-tunable absorption and emission, caused semiconductor nanocrystals to attract a great deal of interest for recent technological developments. For the evaluation of semiconductor nanocrystals as new materials for various applications like optoelectronic devices, knowledge of the structure-property relation...
The CCQM-K88 key comparison was organized by the Inorganic Analysis Working Group of CCQM to test the abilities of the national metrology institutes to measure the mass fraction of lead in lead-free solder containing silver and copper. National Metrology Institute of Japan (NMIJ), National Institute of Metrology of China (NIM) and Korea Research In...
A Be-9-solution has been chemically prepared from phenakite (Be2SiO4) mineral grains as commercial Be-9-solutions are too high in long-lived Be-10. The solution is intended to be used as a carrier for radiochemical separation of Be-10 to be measured by accelerator mass spectrometry (AMS). Thus, accurate data of the Be-9-concentration of this soluti...
In an intercomparison study three low alloy steel materials were analyzed on their content of the trace element Mg, and five different analytical techniques were used, namely spark-OES, inductively coupled plasma optical emission spectrometry (ICP-OES), inductively coupled plasma time of flight mass spectrometry (ICP-TOFMS), inductively coupled pla...
The traceability requirements for certification analyses of reference materials are much higher than for routine analysis, where certified matrix reference materials (CRM) can be used for calibration and to establish traceability. Although the ISO-Guides related to CRM production and certification are not fully clear concerning calibration, many CR...
The certification of a boron carbide reference material for chemical composition is described. The mass fractions of 16 elements and two boron species are certified in an international interlaboratory comparison with 35 participating laboratories from six different countries. Beside chemical characterization the certification process includes homog...
Two types of copper samples, compact certified copper reference materials and calibration samples prepared from liquid doped, pressed copper powders, were studied in terms of accuracy of obtained calibration functions originating from infrared spark ablation. Additionally, corresponding particle size distributions of the aerosols from infrared spar...
The EU RoHS Directive (2002/95/EC of the European Parliament and of the Council) bans the placing of new electrical and electronic equipment containing more than agreed levels of lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyl (PBB) and polybrominated diphenyl ether (PBDE) flame retardants on the EU market. It necessitates meth...
The degree of equivalence within the participating national metrology institutes for the measurement results of the mass fractions
of the analytes Cr, Cu, Fe, Mn and Zn in an aluminium alloy was assessed. This interlaboratory comité consultatif pour la
quantité de matière key comparison (CCQM-K42) was organised as an activity of the Inorganic Analy...
Three methods for direct solid sampling of bulk material namely IRlaser ablation, glow discharge and spark OES, were compared with respect to analytical figures of merit obtained for elemental analysis with atomic spectrometry. Matrices investigated were copper, pressed doped copper powder, and magnesium alloys. For the vast majority of analytes, s...
The high economic value of catalysts containing the platinum group elements platinum, rhodium and palladium as active components
causes the need to be able to measure the precious metal loading with small uncertainty and to have suitable certified reference
materials fulfilling high demands on the quality of the certified values. In European Refere...
The CCQM-K64 study was performed to demonstrate and document the measurement capabilities of national metrology institutes in the determination of main and minor elements in copper alloys. The key comparison was coordinated by BAM Federal Institute for Materials Research and Testing, Berlin, Germany as an activity of the Inorganic Analysis Working...
The objective of this work was to test the compliance of commercially available batteries with the German Battery Ordinance, a project of the German government that was initiated by the Federal Environment Agency. Different types of commercially available dry cells were analysed for their cadmium, lead and mercury contents. The dry cells underwent...
The reliability and performance of various analytical methods for the determination of 22 trace elements in pure copper is
compared and discussed. The work was performed in the framework of an interlaboratory comparison for the preparation of four
pure copper reference materials with graded element mass fractions of Ag, Al, As, Bi, Cd, Co, Cr, Fe,...
The capabilities of National Metrology Institutes (NMIs) and selected outside “expert” laboratories of determining the mass
fractions of the main and minor elements Cu, Pb, Sn, Fe, and Ni in a lead-containing brass were assessed. This pilot study
P76 was organized as an activity of the Inorganic Analysis Working Group of CCQM and was piloted by th...
Within the framework of a German government project (initiated by the Federal Environment Agency) to check the compliance of commercially available batteries with the German Battery Ordinance concerning their heavy metal contents, 18 different types of commercially available zinc-air button cells were analysed for their cadmium, lead and mercury co...
The mass fraction of potassium hydrogen phthalate (KHP) from a specific batch was certified as an acidimetric standard. Two different analytical methods on a metrological level were used to carry out certification analysis: precision constant current coulometric and volumetric titration with NaOH. It could be shown that with a commercial automatic...
The key comparison CCQM-K33 was organized by the Inorganic Analysis Working Group of the CCQM to test the abilities of the national metrology institutes to measure the mass fractions of minor elements in steel. Elements to be analysed were Cr, Mn, Ni and Mo in low alloy steel. The National Metrology Institute of Japan (NMIJ), the National Institute...
The special importance of the analysis of non-metals in high purity metals, which will serve as national standards for elemental analysis in Germany, is illustrated for oxygen and nitrogen. The typical range of the mass fraction of oxygen and nitrogen in these materials is below 10 µg/g, often close to 1 µg/g. The two methods applied at BAM for the...
Before and after the certification of a reference material (RM) there are a lot of steps which are also very important for the quality of a RM. The candidate material will be procured according to the demand analysis in the European region. The next key steps are the sample preparation and a suitability test of the material. Especially the homogene...
The preparation and analysis of the oxygen mass fraction of three pure copper reference materials (BAM-379/1, BAM-379/2, BAM-379/3)
intended for the calibration of spark emission spectrometry are described here. Data of homogeneity testing and round robin
certification in collaboration with 12 independent laboratories from metalworking industry and...
There are two new reference materials for analysis of lead and lead alloys available from Federal Institute for Materials Research and Testing (BAM). The main fields of application of these samples Are optical emission spectroscopy with spark discharge (SD-OES)and x-ray fluorescence analysis. The element contents of the alloying elements calcium, t...
To study the health effects of high dietary maternal selenium intake breast milk, blood and toe-nails were collected from 143 women (20-24 days of lactation) living in Venezuelan states of Yaracuy and Portuguesa. Depending on the regional selenium intake level three regions were defined within the total range of 90-980 microgram per day. The sample...
Rapid determination of 10Be in the primary cooling water necessitates obtaining the 10Be-to-9Be ratio from the operating data of the reactor and determining total Be in the water by ICP AES or Zeeman GFAAS, the instrumental and experimental parameters for both of which are tabulated; either technique is performed at the Be 234.861 nm line, and the...
The element contents of Ag, Al, As, Be, Bi, Cd, Co, Cr, Fe, Mg, Mn, Ni, P, Pb, S, Sb, Se, Sn, Te, Ti, Zn and Zr in a pure
copper (99.5%) sample (CRM BAM-376) for use in spark emission and X-ray fluorescence spectrometry were certified and the certified
values are given. For Si, the certification has not yet been completed, the content of this elem...
In human milk trace elements normally exist in a form which can easily be absorbed by the newborn infant. For investigations of the bioavailability of trace elements it is necessary to carry out a speciation analysis of the elements of interest. An independent analytical method has been used for the quality control of the shape of the element profi...
In human milk trace elements normally exist in a form which can easily be absorbed by the newborn infant. For investigations of the bioavailability of trace elements it is necessary to carry out a speciation analysis of the elements of interest. An independent analytical method has been used for the quality control of the shape of the element profi...
Seven emission lines for the determination of Al in infusion solutions by means of inductively coupled plasma atomic emission spectrometry were compared. For this comparison, wavelength scans of different samples were made in order to study the background in the region of each line and to inspect for interference structures arising from molecular b...
Evaluation of the iatrogenic aluminum load by aluminum-contaminated nutritive infusion solutions in long-term total parenteral nutrition (TPN).
16 consecutive patients (6 children, 10 adults) who had to undergo total parenteral nutrition for more than one month. Three of them were from a home parenteral nutrition program. The duration of TPN was up...
For patients with disturbed aluminum (Al) excretion, a high Al intake is not without risk. As main aluminum sources infusion solutions and solutions for parenteral nutrition have been identified. This study will give current survey of aluminum loading of the above-mentioned preparations.
The aluminum loading of 139 different infusion solutions and...
The Enschi district in Hubei province, Peoples Republic of China is geochemically one of the two seleniferous regions, producing both selenium (Se) black tea and the Se green tea. Three samples of green tea with different Se contents and one non-Se tea were analysed. The following mineral and trace elements were determined by inductively coupled pl...
The Enschi district in Hubei province, Peoples Republic of China is geochemically one of the two seleniferous regions, producing both selenium (Se) black tea and the Se green tea. Three samples of green tea with different Se contents and one non-Se tea were analysed. The following mineral and trace elements were determined by inductively coupled pl...
An analytical procedure for the determination of Se, as well as of other trace elements of clinical interest, in undiluted blood serum samples is presented. This procedure allows the on-line wet ashing of the sample, the hydride generation and the determination of the SeH2 formed in one step. For this purpose, carrier solution and the injected samp...
A patient who developed valproate-associated hepatotoxicity had significantly lower serum levels of total protein, albumin and selenium than the controls. This study shows that with the beginning of the hepatic coma metallothionein (MT) appeared in the serum mainly in the form of Zn-thionein, which altered the Zn distribution pattern of the serum i...
The German standard method for the determination of chloride in water, waste water and sludge, laid down in the norm DIN 38405-D 1–2, is based on the titration with AgNO3 and potentiometric detection for the range 7–140 mg/l chloride. In order to investigate the equivalence of a more rapid method, flow injection analysis with different detection me...
Mikroreprod. eines Ms. Getr. Zählung : graph. Darst. Berlin, Techn. Univ., Diss., 1992 (Nur als Mikrofiche für den Austausch).
