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Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment

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https://www.readbyqxmd.com/read/27931180/characterisation-of-food-contact-non-stick-coatings-containing-tio2-nanoparticles-and-study-of-their-possible-release-into-food
#1
Viviana Golja, Goran Dražić, Martina Lorenzetti, Janja Vidmar, Janez Ščančar, Maša Zalaznik, Mitjan Kalin, Saša Novak
Novel nanoparticles containing non-stick coatings have been developed for food contact applications such as frying pans. Possible release of nanoparticles from such coatings into food is not known. In this paper, the characterisation of commercially available non-stick coatings was performed by use of FTIR, electron and optical microscopy, EDXS and XRD analysis. Characterisation revealed that the coatings contained micron- and nanosized rutile TiO2 particles, and quartz SiO2 embedded in a silicone polymer matrix...
December 9, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27841972/non-targeted-detection-of-milk-powder-adulteration-using-raman-spectroscopy-and-chemometrics-melamine-case-study
#2
Sanjeewa R Karunathilaka, Samantha Farris, Magdi M Mossoba, Jeffrey C Moore, Betsy Jean Yakes
Raman spectroscopy in combination with chemometrics was explored as a rapid, non-targeted screening method for the detection of milk powder (MP) adulteration using melamine as an example contaminant. Raman spectroscopy and an unsupervised pattern-recognition method, principal component analysis (PCA), allowed for the differentiation of authentic MPs from adulterated ones at concentrations > 1.0% for dry-blended (DB) samples and > 0.30% for wet-blended (WB) ones. Soft independent modelling of class analogy (SIMCA), a supervised pattern-recognition method, was also used to classify test samples as adulterated or authentic...
December 9, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27928942/occurrence-of-polychlorinated-dibenzo-p-dioxins-pcdds-dibenzofurans-pcdfs-and-polychlorinated-biphenyls-pcbs-in-eggs-from-free-range-hens-in-campania-southern-italy-and-risk-evaluation
#3
Sara Lambiase, Francesco Paolo Serpe, Stefania Cavallo, Guido Rosato, Loredana Baldi, Bruno Neri, Mauro Esposito
Hens' eggs collected in home-producing farms located in different areas of the Campania region of southern Italy were analysed for six NDL-polychlorobiphenyls (PCB indicators), 17 polychlorodibenzo-p-dioxins (PCDDs) and polychlorodibenzofurans (PCDFs), and 12 congeners of dioxin-like PCBs (DL-PCBs). In the investigated area, waste from civil, industrial and hospital activities was illegally dumped and in many cases burned, so the area is called the 'Land of fire'. This illicit practice has been considered the main source of pollution in this territory and the cause of the persistent organic pollutants' (POPs) contamination in the neighbouring lands intended for agricultural use and livestock...
December 8, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27918239/-137-caesium-in-samples-of-wild-grown-boletus-edulis-bull-from-lucca-province-tuscany-italy-and-other-italian-and-european-geographical-areas
#4
Laura Betti, Lionella Palego, Antonio Lucacchini, Gino Giannaccini
Samples of the edible mushroom Boletus edulis Bull. were studied to assess the risk for human health related to their content of the artificial radionuclide (137)Cs. Fresh B. edulis carpophores were collected in four undeveloped microhabitats of Lucca province (Tuscany, North-Central Italy). Dried non-cultivated samples coming from this same district and 11 other Italian provinces or European countries were instead purchased fromcommercial sources. Contents of (137)Cs, reported as Bq kg(‒1) dry weight (dw), were measured by γ-spectrometry...
December 5, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27915676/dietary-exposure-to-trace-elements-and-health-risk-assessment-in-the-region-of-valencia-spain-a-total-diet-study
#5
Silvia Marín, Olga Pardo, Rosario Báguena, Guillermina Font, Vicent Yusà
Dietary exposure of the Valencian Region population to lead, cadmium, inorganic arsenic (iAs), chromium, copper, tin and methylmercury (meHg) was assessed in a Total Diet Study carried out in the Region of Valencia in 2010-2011. A total of 8100 food samples were collected and analysed. Occurrence data were combined with consumption data to estimate dietary exposure in adults (>15 years of age) and young children (6-15 years of age). The estimated intake was calculated by a probabilistic approach. Average intake levels (optimistic scenario) for lead, inorganic arsenic (iAs), chromium and tin were 0...
December 5, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27915587/the-determination-of-testosterone-esters-and-estradiol-esters-in-bovine-and-porcine-blood-serum
#6
Martina Rejtharová, Libor Rejthar, Katarína Čačková
Monitoring of steroid esters in blood serum is desirable in order to detect possible illegal use of natural hormones as growth promoters. A method for determination of testosterone propionate, testosterone benzoate, testosterone isocaproate, testosterone decanoate and estradiol benzoate in bovine and porcine blood serum was developed. The procedure consists of protein precipitation and removal of phospholipids using a HybridSPE®-Phospholipid column followed by clean-up on a hydrophilic modified styrene polymer Supel(TM) -Select HLB column and LC-MS/MS measurement...
December 5, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27915584/single-laboratory-validation-of-an-lc-ms-ms-method-for-determining-florfenicol-ff-and-florfenicol-amine-ffa-residues-in-chicken-feathers-and-application-to-a-residue-depletion-study
#7
J Cornejo, E Pokrant, R Riquelme, C Briceño, A Maddaleno, C Araya-Jordán, B San Martin
A suitable analytical method is required to study the behaviour of florfenicol (FF) and its metabolite florfenicol amine (FFA) in broiler's feathers. An LC-MS/MS method was developed, assessed, and intralaboratory-validated for FF and FFA analyses. We chose cloramphenicol-d5 as an internal standard, acetone as a solvent for the extraction of the analytes and dichloromethane for the clean-up. Through LC-MS/MS analysis, we established a detection limit of 20 μg kg(-1), as well as a calculated quantification limit of 24...
December 5, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27915582/lc-ms-ms-methods-for-sulfadimethoxine-and-ormetoprim-analysis-in-feed-and-fish-fillet-and-a-leaching-study-for-feed-after-alternative-procedures-for-drugs-incorporation
#8
Ana Paula Fais, Rodolfo Scarpino Barboza Franco, Agnaldo Fernando Baldo da Silva, Osvaldo de Freitas, Jonas Augusto Rizzato Paschoal
This paper describes the method development for sulfadimethoxine (SDM) and ormetoprim (OMP) quantitation in fish feed and fish fillet employing LC-MS/MS. In order to assess the reliability of the analytical method, valuation was undertaken as recommended by guidelines proposed by the Brazilian Ministry of Agriculture. The calibration curve for quantification of both drugs in feed showed adequate linearity (r > 0.99), precision (CV < 12%) and trueness ranging from 97 to 100%. The method for the determination of SDM and OMP residues in fish fillet involving a simple sample preparation procedure which had adequate linearity (r > 0...
December 5, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27827555/uk-dietary-exposure-to-pcdd-fs-pcbs-pbdd-fs-pbbs-and-pbdes-comparison-of-results-from-24-h-duplicate-diets-and-total-diet-studies
#9
Lindsay Bramwell, David Mortimer, Martin Rose, Alwyn Fernandes, Stuart Harrad, Tanja Pless-Mulloli
Chemicals in food are monitored to check for compliance with regulatory limits and to evaluate trends in dietary exposures, among other reasons. This study compared two different methods for estimating human dietary exposure to lipophilic persistent organic pollutants (POPs) during 2011/12: (1) the 2012 Total Diet Study (TDS) conducted by the UK Food Standards Agency (FSA) and (2) a 24-h duplicate diet (DD) study of 20 adults from the North East of England. The equivalence of the two approaches was assessed; anything less than an order of magnitude could be considered reasonable and within three-fold (equivalent to 0...
December 1, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27899063/a-simple-sample-preparation-for-simultaneous-determination-of-chloramphenicol-and-its-succinate-esters-in-food-products-using-high-performance-liquid-chromatography-high-resolution-mass-spectrometry
#10
Vasiliy Amelin, Anton Korotkov
A simple method is described for determination of chloramphenicol and its succinate esters in food products. Examination of food products using HPLC/high-resolution mass spectrometry showed the presence of not only chloramphenicol but also its succinate forms. A scheme is proposed for determining chloramphenicol and its succinate esters (calculated as chloramphenicol) in meat (beef, pork, poultry), milk, liver, kidney, eggs, fish and honey. Analytes are extracted from a 1.0 g sample with 5 ml acetonitrile. It was found that using the method of standard addition and diluting the extract with water leads to the elimination of matrix effects and also eliminates errors associated with peak splitting due to the separate elution of the differing forms of the analyte...
November 30, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27899061/evaluating-three-commonly-used-growth-media-for-assessing-fumonisin-analogues-fb1-fb2-and-fb3-production-by-nine-fusarium-verticillioides-isolates
#11
A Schoeman, B C Flett, B Janse van Rensburg
Maize is most often infected by the fumonisin-producing Fusarium verticillioides. Total fumonisins of natural infected grain is made up of FB1, FB2 and FB3 with FB1 occurring naturally at higher levels. A maize plant can be infected with more than one F. verticillioides isolate, and finding a reliable method to elucidate the toxigenic potential of these isolates is important to extrapolate the possible fumonisin risk to consumers of grain. It is not clear whether F. verticillioides produce similar fumonisin levels, as well as fumonisin analogue ratios across media...
November 30, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27899060/determination-of-patulin-in-apple-juice-using-magnetic-solid-phase-extraction-coupled-with-high-performance-liquid-chromatography
#12
Youwei Yu, Zhefeng Fan
An efficient magnetic sorbent consisting of benzofuran-2-carboxylic acid-loaded magnetic nanocomposite was successfully synthesized for preconcentration of patulin from apple juice. The prepared magnetic nanocomposite was characterized by scanning electron microscopy, transmission electron microscopy, and Fourier transform-infrared spectroscopy. Determination of enriched patulin was performed by HPLC. The best adsorption conditions were 40 mg of sorbent, 50 mL of apple juice sample, pH 5, ambient temperature and 25 min; the elution conditions were 500 μL methanol, pH 5, ambient temperature, and 4 min...
November 30, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27899057/moulds-and-mycotoxins-detected-in-the-regional-speciality-fermented-sausage-slavonski-kulen-during-a-one-year-production-period
#13
Jelka Pleadin, Manuela Zadravec, Dragan Brnić, Irena Perković, Mario Škrivanko, Dragan Kovačević
The aim of this study was to investigate the surface-to-interior mycotoxin contamination of the regional speciality meat product "Slavonski Kulen", occurring during a 12- month period, and to identify moulds present on its surface in the final production stage. In total, 15 pieces of "Slavonski Kulen" were produced and sampled at production months 0, 3, 6, 9 and 12 (three samples per piece). Concentrations of aflatoxin B1 (AFB1) and ochratoxin A (OTA) were determined using the ELISA method, while the identification of moulds made use of both traditional and molecular methods...
November 30, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27892850/determination-of-16-mycotoxins-in-vegetable-oils-using-a-quechers-method-combined-with-high-performance-liquid-chromatography-tandem-mass-spectrometry
#14
Hongxia Zhao, Xiuying Chen, Chen Shen, Baocheng Qu
A simple and efficient method for determining multiple mycotoxins was developed using a QuEChERS (quick, easy, cheap, effective, rugged and safe) based extraction procedure in vegetable oils. High performance liquid chromatography tandem mass spectrometry (HPLC-MSMS) was used for the quantification and confirmation of 16 chemically diversified mycotoxins. Different extraction procedures were studied and optimized by spiking 16 analytes into blank matrix, and the extraction with 85% MeCN solution and C18 as cleaning sorbent allowed an efficient recovery of 72...
November 28, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27892830/risk-assessment-of-plant-food-supplements-and-other-herbal-products-containing-aristolochic-acids-using-the-margin-of-exposure-moe-approach
#15
Rozaini Abdullah, Leolean Nyle Diaz, Sebastiaan Wesseling, Ivonne M C M Rietjens
After the incidences of induction of Aristolochic Acid Nephropathy after consumption of herbal weight loss preparations that accidentally contained aristolochic acids (AAs), several countries defined national restrictions on the presence of AAs in food, including plant food supplements (PFS) and herbal products. The aim of the present study was to investigate whether the risks associated with exposure to AAs via PFS and herbal products are at present indeed negligible. Data reported in literature on AA levels in PFS and other herbal products and also obtained from a new series of PFS in the present study were used to calculate the estimated daily intakes (EDIs) and corresponding Margin of Exposure (MOE) values...
November 28, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27892828/qualitative-and-quantitative-analysis-of-monomers-in-polyesters-for-food-contact-materials
#16
Fabrian Brenz, Linke Susanne, Simat Thomas
Polyesters (PES) are gaining more importance on the food contact material (FCM) market and the variety of properties and applications is expected to be wide. In order to acquire the desired properties manufacturers can combine several FCM approved polyvalent carboxylic acids (PCA) and polyols as monomers. However, information about the qualitative and quantitative composition of FCM articles is often limited. The method presented here describes analysis of PES with the identification and quantification of 25 polyester monomers (10 PCA, 15 polyols) by HPLC with diode array detection (HPLC-DAD) and GC-MS after alkaline hydrolysis...
November 28, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27892783/hen-egg-white-lysozyme-is-a-hidden-allergen-in-italian-commercial-ciders
#17
Federica Mainente, Barbara Simonato, Gabriella Pasini, Cinzia Franchin, Giorgio Arrigoni, Corrado Rizzi
Hen egg white lysozyme (HEWL) is an enzyme used in alcoholic fermentation for its ability to control the growth of Gram-positive bacteria and spoilage bacteria, without inhibiting yeast growth, and it allows a reduction in the use of sulphur dioxide. Nevertheless, considering the potential allergenicity of this protein, the presence of HEWL should be declared on the label of the final product. In this work, we analysed 18 commercial Italian ciders by LC-MS/MS, and found traces of HEWL in 12 samples without label declaration...
November 28, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27885948/urinary-signature-of-pig-carcasses-with-boar-taint-by-liquid-chromatography-high-resolution-mass-spectrometry
#18
Cristina C Jacob, Gaud Dervilly-Pinel, Yoann Deceuninck, Audrey Gicquiau, Patrick Chevillon, Michel Bonneau, Bruno Le Bizec
Boar taint is an offensive odor that can occur while cooking pork or pork products and is identified in some uncastrated male pigs that have reached puberty. It is widely held that boar taint is the result of the accumulation in back-fat of two malodorous compounds: androstenone and skatole. The purpose of the present study was to assess a mass spectrometry-based metabolomics strategy to investigate the metabolic profile of urine samples from pig carcasses presenting low (untainted) and high (tainted) levels of androstenone and skatole in back fat...
November 25, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27885925/group-detection-of-don-and-its-modified-forms-by-an-elisa-kit
#19
L Righetti, G Galaverna, C Dall'Asta
Deoxynivalenol (DON) and its modified forms (3-, and 15-Acetyl-DON, DON-3-glucoside) are commonly analysed by chromatographic methods. Indeed, coupled with proper extraction and clean-up, LC-MS represents the best approach for multi-mycotoxin measurements. On the other hand, immunochemistry-based methods are possibly able to detect a family of structurally related compounds, although the determination of single contributions is not possible so far. However, ELISA methods often lead to an apparent overestimation of the mycotoxins content, because modified forms and matrix components can potentially cross-react with the antibodies (designed for the parent toxin)...
November 25, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27805864/exposure-of-polish-children-to-southampton-food-colours
#20
J Gajda-Wyrębek, K Kuźma, A Świtka, J Jarecka, M Beresińska, J Postupolski
A study published in 2007 showed that the intake of six food colours (the so-called 'Southampton colours') may have an adverse effect on activity and attention in children. The present study set out to assess the exposure of Polish children (3 and 8-9 years old, n = 149) to six of the target colours. Two methods were used to evaluate colour consumption by children: scenario 1 using the maximum permitted levels (MPLs) and actual food consumption data; and scenario 2 using the actual levels in food and actual food consumption data...
November 24, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
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