Food Analytical Methods (FOOD ANAL METHOD )

Publisher: Springer Verlag

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Impact factor 1.80

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    Impact factor
  • 5-year impact
    2.07
  • Cited half-life
    2.30
  • Immediacy index
    0.24
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  • Article influence
    0.45
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    SpringerLink
  • ISSN
    1936-9751
  • OCLC
    288980005
  • Material type
    Document, Periodical
  • Document type
    Journal / Magazine / Newspaper, Computer File

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Springer Verlag

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Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: A method of stir bar sorptive extraction (SBSE) and thermal desorption (TD) with gas chromatography–mass spectrometry (GC-MS) has been developed for qualitative and quantitative analysis of volatile and flavor compounds in grilled beef. To achieve optimum extraction and analysis performance for volatile and flavor compounds, desorption temperature and solid extraction conditions of the method were studied. Grilled beef and grilled beef dripping were analyzed by the developed method with short analysis program, and a total of 57 volatile (31 flavor) compounds, including 12 aldehydes, 13 hydrocarbons, 12 alcohols and ketones, 9 nitrogen- and sulfur-containing compounds, and 10 pyrazine compounds, were identified with little variation in triplicates. Four typical flavor compounds: hexanal, methional, 2-ethyl-pyrazine, and nonanal, were selected from main flavor group for quantitative analysis, and the method showed good linearity within the tested concentration range from 2 ng/g to 0.2 μg/g (n = 3, RSDs R 2 > 0.998) and good recovery at 38∼45 % by spiked standards of 100 ng/g (n = 3, RSDs ≤ 11 %) in ground grilled beef. The limits of detection (LOD) range was 0.17–0.26 ng/g (S/N = 3, n = 3), and the limits of quantification (LOQ) range was 0.56–0.88 ng/g (S/N = 9, n = 3) for flavor analysts. The simple, fast, and solvent-less method allows us to obtain reliable qualitative and quantitative data of volatile and flavor constituents which are necessary for the beef quality evaluation.
    Food Analytical Methods 02/2015; 8(2).
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    ABSTRACT: High-performance cation exchange chromatography with pulsed integrated amperometric electrochemical detector (HPCEC-PAD) with post-column addition of hydroxide was first developed for simultaneous analysis of 4-methylimidazole (4-MeI) and 2-methylimidazole (2-MeI) in caramel color and soft drinks after solid-phase extraction (SPE). A CS12A cation exchange column was used to separate the targeted analytes with a perfect resolution (2.70). This method demonstrated low limit of quantification (0.05–10 mg/L) and excellent linearity with correlation of determination (R 2 > 0.999 for 2-MeI and 0.997 for 4-MeI). Low concentrations of 4-MeI were found in five soft drinks, whereas those in caramel color were generally high. Additionally, the suggested method showed higher resolution and sensitivity comparing with previous reported methods for 4-MeI and 2-MeI analyses.
    Food Analytical Methods 02/2015; 8(2).
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    ABSTRACT: For simultaneously monitoring two classes of organophosphorus pesticide residues in food samples, a polyclonal antibody against a dual-generic hapten immunogen, which was prepared by conjugating two generic haptens (O,O-dimethyl thiophosphate hapten and O,O-diethyl phosphate hapten) to the same carrier protein BSA, was raised and used to develop a broad-specificity competitive indirect enzyme-linked immunosorbent assay. With the optimized conditions, the developed immunoassay was able to detect 11 organothiophosphate pesticide and 5 organophosphate pesticide residues with detection limits of 0.018–0.135 μg/mL and 0.013–0.171 μg/mL, respectively. Recoveries of paraoxon-ethyl, fenamiphos, parathion-methyl, and fenthion from spiked samples ranged between 85.8 and 105.5 %. The results indicated that the immunoassay developed in this study is suitable for high-throughput screening of these low-molecular-weight contaminants in food samples.
    Food Analytical Methods 02/2015; 8(2).
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    ABSTRACT: The enantioseparation and determination of isocarbophos enantiomers in orange pulp, peel, and kumquat by chiral HPLC tandem mass spectrometry (HPLC-MS/MS) are presented. Four cellulose-based chiral columns and two amylose-based columns were employed to explore the influence of chiral stationary phase on the enantioseparation selectivity and elution order of isocarbophos enantiomers. The fastest baseline enantioseparation of isocarbophos was achieved on amylose tris(3,5-dimethylphenylcarbamate) (Chiralpak AD-3R) with acetonitrile and water (containing 2 mmol L−1 ammonium formate and 0.1 % formic acid) (60:40, v/v) as mobile phase. The influence of temperature on enantioseparation of isocarbophos was investigated, indicating that the enantioseparation of isocarbophos on Chiralpak AD-3R columns was an enthalpy-driven separation. The method performance including linearity, sensitivity, matrix effect, and precision was evaluated. Under the optimized conditions, the recoveries of the isocarbophos enantiomers in orange pulp, peel, and kumquat were 76.1–95.4 % with RSD lower than 11.1 % at 5, 50, and 250 μg kg−1 levels. The limits of detection ranged from 0.2 to 0.5 μg kg−1 for enantiomers in orange pulp, peel, and kumquat. Application of the proposed method to the real sample analysis suggested its potential use in the enantioselective determination of isocarbophos in food samples.
    Food Analytical Methods 02/2015; 8(2).
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    ABSTRACT: Springiness is an important quality characteristic of chicken meat, related with muscle structure and contents of biochemical components, and has great influence on eating quality of chicken meat. Traditional methods for springiness evaluation including manual inspection and instrumental measurement are tedious, time-consuming, and destructive. This study implemented a smart and promising nondestructive technique, i.e., hyperspectral imaging, for rapid prediction of springiness of fresh chicken meat. Hyperspectral images of tested samples with different springiness levels were acquired, and their spectral data were extracted in the spectral range of 400–1,000 nm. Two calibration methods, namely, partial least squares regression (PLSR) and artificial neural network (ANN), were respectively used to correlate the extracted spectra of chicken meat samples with the reference springiness values estimated by a twice-compression method. Successful projections algorithm (SPA) as a popular wavelength selection tool was applied, and ten optimal wavelengths (416, 458, 581, 637, 696, 722, 740, 754, 773, and 973 nm) were finally selected. Based on the selected optimal wavelengths, optimized SPA-PLSR and SPA-ANN model were established, respectively. By comparing with the results of two optimized models, the SPA-PLSR model showed better prediction results with high correlation coefficient (R p) of 0.84 and low root mean square error by prediction (RMSEP) of 0.159. Finally, an image processing algorithm was developed to transfer the SPA-PLSR model to each pixel in chicken meat for visualizing their springiness distribution. The results from the current study indicated that hyperspectral imaging could be a rapid and nondestructive tool for prediction of springiness of chicken meat.
    Food Analytical Methods 02/2015; 8(2).
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    ABSTRACT: Probiotics are constituents of functional foods, which when administered in appropriate amounts confer a benefit to the host. Research studies performed on probiotics and gut microbiota along recent years have been focused on investigating the correlation between their molecular features and their impacts on individual health status. Consequently, many present and future challenges are being raised to elucidate the molecular bases of their interaction-mediated systemic effects, along with the ability to manipulate them for preventive and therapeutic interventions. Moreover, insights derived from the parallel evolution of “omics” technologies, with applications in different fields of biomedicine, are being efficiently transferred to this area of molecular microbiology. Thus, the present work compiles a summary of the general and useful omics applications: genomics, metagenomics, transcriptomics, proteomics, metabolomics, phenomics, and recently, integromics and interactomics and their putative use for validating models of interactions of the better-known probiotic microorganisms administered Lactobacillus and Bifidobacterium species. The impact on molecular resistance features, formula preparation, and route administration are also discussed. Omics tools will generate large amounts of data that, once correctly interpreted, are expected to rapidly validate the knowledge of probiotic molecular fundaments that trigger important positive human biological processes.
    Food Analytical Methods 02/2015; 8(2).
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    ABSTRACT: In the present paper, differential pulse polarography was applied to determine the dithionite content of sugar and loaf sugar samples. The relevant parameters were studied and optimized. Linearity in the optimized conditions pH = 4.6 (sample solution), pulse amplitude = 0.09 V, and mercury drop size = 4 was 5–40 mg/L (R 2 > 0.99). The limit of detection and limit of quantification for standard solution were about 1.40 and 4.66 mg/L, respectively. After optimization, the proposed method was used to determine the analyte in 51 real samples collected from sugar factories in Zanjan, Iran. The sensitivity and accuracy of the proposed method provided acceptable values to determine dithionite in real samples of sugar and loaf sugar. The results showed that the dithionite content in the samples ranged from
    Food Analytical Methods 02/2015; 8(2).
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    ABSTRACT: Food-labelling regulations require that meat species in food and feed are accurately declared to the consumer. Traceability systems based on species identification through DNA analysis are potent tools for the supervision of food adulteration. In this study, a TaqMan real-time polymerase chain reaction (PCR) assay targeting a short mitochondrial 12S ribosomal RNA (rRNA) gene fragment of 73 base pair (bp) was developed for detection of horse DNA in different commercial meat products for human and pet consumption. The method was found to be specific for horse and did not show any cross-reactivity with different species of mammals, birds, fish and plants. The assay complies with the acceptance criteria required for real-time PCR methods in terms of applicability, linear dynamic range, accuracy and PCR efficiency and showed to be sensitive allowing the detection of 1 pg of horse DNA. A range of food and feed products (n = 171) was screened with the horse-specific real-time PCR to determine whether a correct labelling had been employed at the market level. Results obtained when testing the meat products for human consumption were in agreement with the labelling description provided by the suppliers. In the case of the pet foods, undeclared horse meat was detected in 21 % of the samples at low levels, suggesting unintentional cross-contamination during processing. The reported real-time PCR methodology may represent a suitable tool for the detection of food mislabelling.
    Food Analytical Methods 02/2015; 8(2).
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    ABSTRACT: Acacetin (1), 4′,7-dimethyl naringenin (2), and 4′,7-dimethyl apigenin (3)—three of the main markers active components of propolis—were chosen for the development and validation of a suitable HPLC method for quality control of the crude drug. A 23 factorial design was employed to study the main interactions of independent variables, and the efficient separation was achieved using an XBridge C18 column with an isocratic binary phase consisting of deionized water (TFA; 0.1 % v/v) (eluent A) in methanol (eluent B) (45:65, v/v) at a flow rate of 1.0 mL min−1. The method allows the quantification of 1–3; for each compound, a linear response was evaluated within the range of 100–1,000 μg mL−1 for 1, 25–200 μg mL−1 for 2, and 8–60 μg mL−1 for 3. All the calibration curves showed good linearity within the test ranges (r 2 ≥ 0.999). Percentage recoveries of the selected flavonoids 1–3 ranged between 98.3 and 101.2 % (RSD ≤2.0 %). The intra- and interday precision RSDs were no more than 2.0 %, while the repeatability variation was no more than 2.0 %. Finally, the method was applied to establish some seasonal and geographical variations of the markers in propolis obtained from several regions of Mexico. Thus, 4′,7-dimethyl apigenin (3) was selected as a marker compound from Mexican propolis, and, along with 2, could be useful for quality control procedures focused in to establish some geographical variation of Mexican propolis.
    Food Analytical Methods 02/2015; 8(2).
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    ABSTRACT: In the scope of this study, pesticide residue distribution within a fruit and the possible error deriving from sample preparation step were demonstrated with the analysis of benomyl residues in peel, pulp, and seeds of papaya fruits treated post-harvest. Benomyl residue, measured as carbendazim, in corresponding sections of peel and pulp of papaya fruits ranged from 0.178 to 1.325 mg/kg and 0.025 to 0.087 mg/kg, respectively. Residue concentration decreased in a range between 41 and 83 % by peeling of papaya. All seeds contained residue value below limit of quantification. As the residues are unevenly distributed among the peel, pulp, and seed, pesticide residue analysis should be carried out accurately according to proper sample preparation protocol in peel, pulp, or in whole fruit and evaluated correctly taking into consideration the purpose of the analysis. The proportion of peel and pulp after their separation significantly affected the residues measured in the peel and pulp. It shows how peeling operation can affect the results and how important it is to remove the peel without significant portion of pulp attached to it. Thus, the selected test system could be well used to demonstrate the possible variability of measured residues depending on the uniformity of sample preparation.
    Food Analytical Methods 02/2015; 8(2).
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    ABSTRACT: The present paper reports the application of an optimized pre-column derivatization procedure with aminoquinolyl-N-hydroxysuccinimidyl carbamate (AQC) to the determination of 21 free amino acids in fruit juices. The method permitted the optimal separation of 21 amino acids and ammonium in 30 min. Excellent response linearity was obtained from 2 to 1,000 μM for all amino acids, except tryptophan, for which the linearity was 5–1,000 μM. The fluorescence detection limits ranged from 0.08 pmol (phenylalanine) to 0.69 pmol (cysteine), except for tryptophan (7.89 pmol), for a signal-to-noise ratio of 3. The relative standard deviations of peak areas ranged from 0.1 to 0.4 % for intraday analysis and from 2.1 to 5.0 % for interday analysis. The method was applied to analyze the free amino acids in six fruit juices, and the recoveries of the proposed method were 90.4 to 103.3 %. The total free amino acid content ranged from 56.97 mg L−1 (apple) to 469.45 mg L−1 (longan) in six fruit juices. Aspartic acid (Asp), glutamic acid (Glu), asparagine (Asn), serine (Ser), and glutamine (Gln) were present in higher levels in most samples, whereas cysteine (Cys) was below the detection limit in the selected samples. Notable advantages of this method include its speed, ease, low cost, good repeatability, high sensitivity, excellent precision and accuracy, and anti-interference in high-sugar matrices.
    Food Analytical Methods 02/2015; 8(2).
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    ABSTRACT: Presence of reduced ubiquinone, ubiquinol, in dietary supplements can originate either from the reduction of ubiquinone due to the co-formulation processes with reducing agents or intentional addition of ubiquinol. As the amount of ubiquinol influences the analytical techniques intended for total ubiquinone determination and the positioning of dietary supplements, the quantification of ubiquinol can be a prerequisite in the quality control process of the related products. In our study, a comprehensive method development has been carried out including (i) the production of ubiquinol together with its HPLC-ESI-MS/MS based verification, (ii) the monitoring of ubiquinol oxidation during the extraction process, (iii) a novel spiking method to validate ubiquinol calibration and (iv) the determination of analyte recovery with an HPLC-UV technique. The combined method was used to quantify ubiquinol in 12 dietary supplement samples containing 31.5–104.5 mg total Q10 g−1. The range of ubiquinol content was 5–16 % related to total ubiquinone concentration and the extraction efficiency values exceeded 99.6 % in all cases.
    Food Analytical Methods 02/2015; 8(2).
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    ABSTRACT: In this study, a simple and highly sensitive electroanalytical method for the determination of thiabendazole (TBZ) was developed using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) at carboxyl-functionalized multi-walled carbon nanotubes (MWCNT-COOH) modified glassy carbon electrode (MWCNT-COOH/GCE) in phosphate buffer solution (pH = 6.0). MWCNT-COOH/GCE exhibits an enhanced effectiveness for the redox of TBZ. This constructed biosensor exhibited two linear relationships with TBZ concentration range from 5.00 × 10−7 to 4.95 × 10−6 mol/L and 4.95 × 10−6 to 9.80 × 10−5 mol/L, respectively. The detection limit was 3.0 × 10−7 mol/L (S/N = 3) and the relative standard deviation (R.S.D.) was lower than 4.2 % (n = 6). The proposed method was successfully applied to determine TBZ in real samples and the results were satisfactory. The MWCNT-COOH/GCE electrode showed good reproducibility, stability, and anti-interference. The electrochemistry method was also described for the evaluation of TBZ and human serum albumin (HSA) interaction. In the presence of HSA, the peak currents of TBZ decreased linearly due to the formation of a kind of electro-inactive complex. The binding constant between TBZ and HSA was obtained by DPV.
    Food Analytical Methods 02/2015; 8(2).
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    ABSTRACT: A rapid and non-destructive method, based on near-infrared spectroscopy (NIRS) was established for screening prochloraz in green tea soft drink. Two chemometric methods, including partial least-squares discriminant analysis (PLS-DA) and least-squares support vector machines (LS-SVM), were used to establish the calibration model for full-spectrum classification. The results of LS-SVM outperformed those of PLS-DA, with the classification accuracy of 100 % for the calibration set and the prediction set when the two parameters, γ and σ 2, were 454.994 and 1,057.77, respectively, while the classification accuracy of PLS-DA for the calibration set and the prediction set is 99.1 and 94.8 %, respectively. In order to avoid model overfitting, the procedure was applied to the analysis of prochloraz residue in other four kinds of green tea soft drinks. Good results were also received. Due to the small difference between the blank samples and the contaminated ones, an interval, not a threshold, was set. The samples in the interval are suspicious which should be detected by chromatographic method. Thus, after screening by NIRS and the further chemometric analysis, the appearance of false negative samples was avoided, and workload could be greatly reduced.
    Food Analytical Methods 02/2015; 8(2).
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    ABSTRACT: Dicyclanil is a parasiticide used to combat myiasis (flystrike), the infectious infestation of sheep with fly larvae. The European Union has established maximum residue limits (MRLs) for the drug in sheep tissue of 200 μg kg−1 for muscle, 150 μg kg−1 for fat and 400 μg kg−1 for kidney and liver. It is therefore a requirement for regulatory laboratories to have reliable analytical methods at their disposal for the detection of the target analytes, dicyclanil and its major metabolite, 2,4,6-triamino-pyrimidine-5-carbonitrile (TPC). While physicochemical methods have been employed previously, this is the first report of an immunochemically based assay for dicyclanil and TPC. A structural analogue, 2-chloro-4, 6-diamino-5-cyanopyrimidine (CDC), was chosen as a hapten with potential to produce an antibody capable of binding both dicyclanil and TPC. Using homologous ELISA and biosensor assays (in buffer), superior sensitivity was displayed towards dicyclanil (IC50 = 2.1 and 5.0 ng mL−1 respectively) compared to TPC (IC50 = 34.3 and 48.7 ng mL−1, respectively). However, switching to a heterologous format (using a further analogue) for both technologies produced IC50 values of 1.5 ng mL−1 for both analytes by ELISA and 2.8 ng mL−1 (dicyclanil) and 3.7 ng mL−1 (TPC) by biosensor. The heterologous formats were employed to develop ELISA and biosensor methods for the analyses of ovine muscle samples using a simple acetonitrile extraction. Validation of both methods found them to be sufficiently reproducible and sensitive for the purpose of monitoring sheep muscle samples for the presence of non-compliant concentrations of dicyclanil. The detection capability of both methods was found to be less than 100 μg kg−1.
    Food Analytical Methods 02/2015; 8(2).
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    ABSTRACT: LabVIEW IMAQ Vision is potentially useful for inspecting food and agricultural products since it combines the merits of both LabVIEW and IMAQ Vision, which have graphical programming environment and rich image processing functions. This paper provides profound introduction to LabVIEW IMAQ Vision: the principal components of LabVIEW IMAQ Vision, calibration, and image processing and analysis using VIs functions are described. In addition, recent advances in the application of LabVIEW IMAQ Vision to food and agricultural products inspection are reviewed, such as defects detection, shape classification, fruit grading and quality evaluation, etc. Finally, current limitations and likely future development trends are discussed. And the results of discussion showed that the utilization of IMAQ Vision module is restricted by the hardware environment, and mixed programming with LabVIEW and MATLAB is the development trend of LabVIEW IMAQ Vision.
    Food Analytical Methods 02/2015; 8(2).
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    ABSTRACT: Ethephon analysis usually requires indirect and laborious method including a derivatization step before gas chromatography tandem mass spectrometry (GC-MS/MS) determination. In this paper, the described method is quick and based on simple procedure without any clean-up. After addition of ethephon D4 as surrogate, a methanolic extraction was performed. The determination is done by high-performance liquid chromatography (LC) coupled to MS/MS in electrospray-negative mode. The chromatographic separation was achieved on a hydrophilic interaction liquid chromatography (HILIC) column. This methodology significantly reduces the time of analysis to around 10 min for sample extraction and 10 min for determination. The analytical performance was evaluated with grape samples spiked at the limit of quantification, 50 μg kg−1, and at 200 μg kg−1. The results obtained met the SANCO/12571/2013 criteria with recoveries around 96 %, typical of an isotopic dilution method (extraction efficiency was ≈ 60 %). Relative standard deviations in within-day repeatability and day-to-day reproducibility conditions were lower than 5 and 11 %, respectively. Furthermore, the described method is environmental friendly and allows a significant reduction of solvent and reagent consumption.
    Food Analytical Methods 02/2015; 8(2).
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    ABSTRACT: The aim of this work is to study the chemical and functional characterization of balsamic vinegar of Modena (BVM) and traditional balsamic vinegars from Modena (TBVM), using different methods to assay the phenolic content and the antioxidant activity. Besides, NMR analysis was used to obtain information about the principal substances in the samples. One hundred and nine samples of both TBVM and BVM were analyzed in all. Despite the observed high intragroup variability, the statistical analysis showed statistically significant differences between TBVM and BVM. The TBVMs are richer in phenolics, flavonoids, and tannins and show higher antioxidant capacity than BVMs. The general discriminant analysis (GDA) model including all the compositional and NMR data was able to group the samples according to the type of vinegar. The first canonical discriminant function explains 92.2 % of the total variance, and the leave-one out cross-validation show a predictive capacity of 89.6 %.
    Food Analytical Methods 02/2015; 8(2).
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    ABSTRACT: To evaluate the effective implantation of a specific protective culture of Penicillium nalgiovense, a real-time quantitative PCR (qPCR) using SYBR Green methodology was developed. Two specific primers were designed on the basis of the published partial sequences of the Internal Transcribe Spacer (ITS)1–5.8S-ITS2 region of various strains of P. nalgiovense. Using the developed method, a PCR product of 51 bp with a T m value 81.34 °C was detected. T m values of the amplified product allowed specific differentiation between P. nalgiovense and the remaining mould species tested. The developed qPCR method was tested on inoculated slices of dry-cured sausage (‘salchichón’) showing an efficiency of 97.24 %, a R 2 value of 0.99 and a detection limit of P. nalgiovense of 1 log colony-forming units (cfu)/cm2. The qPCR method demonstrated that the protective strain of P. nalgiovense grew and competed against an ochratoxin A (OTA)-producing Penicillium verrucosum strain on commercial dry-cured sausage. This qPCR method provides a specific, accurate and sensitive detection and quantification of P. nalgiovense on dry-cured sausage salchichón in order to estimate its colonization during their processing. This assay will improve strategies to prevent and control unwanted mould colonization and OTA risk in dry-cured meat commodities.
    Food Analytical Methods 01/2015;