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

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https://www.readbyqxmd.com/read/28156210/simultaneous-determination-of-clavulanic-acid-and-tazobactam-in-bovine-milk-by-hplc
#1
Peipei Guo, Yuan Chen, Chonghui Yue, Guoping Yu
A rapid and specific high-performance liquid chromatographic method was developed and validated for the simultaneous determination of the β-lactamase inhibitors clavulanic acid and tazobactam in bovine milk. The HPLC system was equipped with ultraviolet absorption detection using a C18 column with a detection wavelength of 215 nm. The mobile phase (pH 4) was 0.02% phosphoric acid and methanol in the ratio of 90:10 v/v. The retention times were 5.67 min for clavulanic acid and 7.22 min for tazobactam. The method exhibited good linearity for clavulanic acid and tazobactam, with R(2) > 0...
February 3, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28150529/free-asparagine-and-sugars-profile-of-cereal-species-the-potential-of-cereals-for-acrylamide-formation-in-foods
#2
Slađana Žilić, Dejan Dodig, Zorica Basić, Jelena Vančetović, Primož Titan, Nenad Đurić, Nataša Tolimir
Cereals based food is one of the major source of Maillard reaction products in the diet. Free amino acids and reducing sugars are considered to be the main precursors in the formation of these heat-induced compounds. In order to determine genetic resources with reduced potential for acrylamide formation, the content of sugars, as well as free asparagine were analyzed in a total of 30 cultivars of 10 varieties belonging to eight species (Triticum aestivum var. lutescens, T. aestivum var. alba, T. aestivum var...
February 2, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28140792/determination-and-confirmation-of-selective-estrogen-receptor-modulators-serms-anti-estrogens-and-aromatase-inhibitors-in-bovine-and-porcine-urine-using-uhplc-ms-ms
#3
Thijs Meijer, Martien L Essers, George Kaklamanos, Saskia S Sterk, Leendert A van Ginkel
Selective estrogen receptor modulators (SERMs), anti-estrogens and aromatase inhibitors are prohibited in human sports doping. However, they also present a risk of being used illegally in animal husbandry for fattening purposes. A method was developed and validated using UHPLC-MS/MS for the determination and confirmation of SERMs, anti-estrogens and aromatase inhibiters in bovine and porcine urine. This method was used in a survey of more than 200 bovine and porcine urine samples from Dutch farms. In 18 out of 103 porcine urine samples (17%) and two out of 114 bovine samples (2%) formestane, an aromatase inhibitor, was detected...
January 31, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28140763/investigation-of-the-role-of-environmental-contamination-in-the-occurrence-of-residues-of-the-veterinary-drug-phenylbutazone-in-cattle
#4
Paul Barnes, Terence L Fodey, Wesley G Smyth, Steven R H Crooks
Phenylbutazone is a non-steroidal anti-inflammatory drug licensed for use in horses to treat musculoskeletal disorders. It is not permitted in the European Union for use in animals destined for the food chain. Official statistics provided by the European Food Safety Authority (EFSA) show that 0.18% of bovines tested in the European Union between 2008 and 2014 for non-steroidal anti-inflammatory drugs were non-compliant, with phenylbutazone representing over 28% of these. Anecdotal evidence suggests animals that have not been treated with the drug may have produced non-compliant samples, possibly through some form of contamination...
January 31, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28067117/furan-in-commercial-baby-foods-from-the-spanish-market-estimation-of-daily-intake-and-risk-assessment
#5
M Soubhi Altaki, F Javier Santos, Lluis Puignou, Maria Teresa Galceran
The occurrence of furan in commercial baby food samples from the Spanish market was evaluated using an automated headspace solid-phase microextraction method coupled to gas chromatography-mass spectrometry (HS-SPME-GC-MS). A total of 76 baby food samples including infant formula, baby cereals, fruit in cans and/or jars, vegetables, meat, and fish, were surveyed for furan content. The lowest concentration of this compound was found in infant formula (<0.02-0.33 ng ml(-1)), and cereal-based food (0.15-2.1 ng g(-1)) while baby food containing fish showed the highest concentrations (19-84 ng g(-1))...
January 31, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28067137/residue-depletion-of-ivermectin-in-broiler-poultry
#6
Nora Mestorino, Daniel Buldain, Andrea Buchamer, Lihuel Gortari, Martín Daniele, María Laura Marchetti
Helminth infections are widespread in the poultry industry. There is evidence of extra-label use of some drugs, such as ivermectin (IVM), in broiler poultry. Pharmacokinetic and residual studies of IVM in poultry, however, are rather scarce. Our aim was to determine time restrictions for broiler chickens fed with balanced feed mixed with IVM for 21 days, and thus achieve acceptable residual levels for consumption as established by the European Union. Sixty 1-day-old chicks were fed with food supplemented with IVM at 5 mg kg(-1) feed for 21 days...
January 26, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28107114/yet-another-angle-but-residues-nonetheless-26-years-of-euroresidue-conferences
#7
Aldert Bergwerff, Saskia Sterk, Leen van Ginkel
No abstract text is available yet for this article.
January 20, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28107105/optimised-deconjugation-of-androgenic-steroid-conjugates-in-bovine-urine
#8
Mikael Pedersen, Henrik L Frandsen, Jens H Andersen
After administration of steroids to animals the steroids are partially metabolised in the liver and kidney to phase 2 metabolites, i.e., glucuronic acid or sulphate conjugates. During analysis these conjugated metabolites are normally deconjugated enzymatically with aryl sulphatase and glucuronidase resulting in free steroids in the extract. It is well known that some sulphates are not deconjugated using aryl sulphatase; instead, for example, solvolysis can be used for deconjugation of these aliphatic sulphates...
January 20, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28105903/criteria-to-define-a-more-relevant-reference-sample-of-titanium-dioxide-in-the-context-of-food-a-multiscale-approach
#9
William Dudefoi, Hélène Terrisse, Mireille Richard-Plouet, Eric Gautron, Florin Popa, Bernard Humbert, Marie-Hélène Ropers
Titanium dioxide (TiO2) is a transition metal oxide widely used as a white pigment in various applications, including food. Due to the classification of TiO2 nanoparticles as potentially harmful for humans by inhalation (IARC, 2006), the presence of nanoparticles in food products needed to be confirmed by a set of independent studies. Seven samples of food grade titanium dioxide (E171) were extensively characterised for their size distribution, crystallinity, and surface properties by the currently recommended methods...
January 20, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28105888/treatment-with-activated-carbon-and-other-adsorbents-as-an-effective-method-for-removal-of-volatile-compounds-in-agricultural-distillates
#10
Maria Balcerek, Katarzyna Pielech-Przybylska, Piotr Patelski, Urszula Dziekońska-Kubczak, Tomaš Jusel
This study investigates the effect of treatment with activated carbon and other adsorbents on the chemical composition and organoleptics of a barley malt-based agricultural distillate. Contact with activated carbon is one of the methods by which the quality of raw distillates and spirit beverages can be improved. Samples placed in contact with 1 g activated carbon (SpiritFerm) per 100 ml distillate with ethanol content of 50% v v(-1) for 1 h showed the largest reductions in the concentrations of most volatile compounds (aldehydes, alcohols, esters)...
January 20, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28105887/light-microscopy-with-a-differential-staining-technique-for-the-characterization-and-discrimination-of-insects-versus-marine-arthropods-in-processed-animal-proteins
#11
Matteo Ottoboni, Marco Tretola, Federica Cheli, Daniela Marchis, Pascal Veys, Vincent Baeten, Luciano Pinotti
The aim of this study was to evaluate the use of light microscopy with a differential staining technique for the discrimination of insect material from marine arthropods - classified as fishmeal. Specifically, three samples of single species insect material, Hermetia illucens (HI), Bombyx mori (BM) and Tenebrio molitor (TM) and two samples of marine arthropods, shrimp material and krill, have been analysed and compared after staining by two reagents to enhance fragment identification. Alizarin Red (AR) and Chlorazol black (CB), which react respectively with calcium salts and chitin, were tested for their potential efficacy in distinguishing between insect and marine materials...
January 20, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28100121/effects-of-bovine-pregnancy-on-the-fatty-acid-composition-of-milk-significance-for-humans-needs
#12
R Barreiro, P Regal, M Díaz-Bao, B I Vázquez, A Cepeda
Milk from forty Holstein dairy cows (twenty pregnant and twenty non-pregnant) was collected from two different farms in Galicia (Spain). The differences in the fatty acid composition of two groups of cows (pregnant and non-pregnant) was studied to determine whether pregnancy status is a determinant factor that can alter the fatty acid profile of milk. Gas-chromatography (GC) coupled to flame ionization detection (FID) was used for determination of the fatty acids. Difference in the milk fatty acids between pregnant and non-pregnant cows were pronounced showing statistically significant differences for some fatty acids and the total saturated and monounsaturated fatty acids...
January 19, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28093042/chloramphenicol-stereoisomers-need-to-be-distinguished-consequences-observed-from-a-proficiency-test
#13
Mark Sykes, Tobias Czymai, Thomas Hektor, Matthew Sharman, Michael Knaggs
Although the use of chloramphenicol (CAP) as a veterinary drug is banned in the European Union and many other countries, monitoring for CAP residues in food is routine. Positive detections are few, but taken extremely seriously. European Union laboratories analysing for CAP should validate methods according to European Commission Decision 2002/657/EC, must be accredited to ISO 17025, and will generally participate in proficiency testing (PT) schemes, such as those offered by the Food Analysis Performance Assessment Scheme (FAPAS®)...
January 17, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28084174/erratum
#14
(no author information available yet)
No abstract text is available yet for this article.
January 13, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28077027/probabilistic-acute-risk-assessment-of-cumulative-exposure-to-organophosphorus-and-carbamate-pesticides-from-dietary-vegetables-and-fruits-in-shanghai-populations
#15
Fan Li, Yaqun Yuan, Pai Meng, Min Wu, Shuguang Li, Bo Chen
Organophosphorus (OPs) and carbamate pesticides (CPs) are among the most widely used pesticides in China, playing a major role in protecting agricultural commodities. In this study, we determined the cumulative acute exposure to organophosphate and carbamate pesticides of Shanghai residents from vegetables and fruits (VFs). The food consumption data were obtained from the Shanghai Food Consumption Survey (SHFCS) of 2012-2014 including a total of 1973 participants aged 2-90 years. The pesticide residue data were obtained from the Shanghai monitoring program during 2008-2011 with 34 organophosphates and 11 carbamates analyzed in a total of 5335 samples of VFs...
January 12, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28077022/feasibility-of-a-novel-multispot-nanoarray-for-antibiotic-screening-in-honey
#16
Sara E McNamee, Giulia Rosar, Lidija Persic, Christopher T Elliott, Katrina Campbell
Practical solutions for multiple antibiotic determination in food is required by the food industry and regulators for cost effective screening purposes. This study describes the feasibility in development and preliminary performance of a novel multispot nanoarray for antibiotic screening in honey. Using a multiplex approach the metabolites of the four main nitrofuran antibiotics including morpholinomethyl-2-oxazolidone (AMOZ), 3-amino-2-oxazolidinone (AOZ), semicarbazide (SEM), 1-aminohydantoin (AHD) and chloramphenicol (CAP) were simultaneously detected...
January 12, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27951749/confirmation-of-%C3%AE-agonist-residues-in-bovine-retina-and-liver-using-hplc-ms-ms-and-evaluation-of-matrix-dependent-problems
#17
Patricia Regal, Mónica Díaz-Bao, Rocío Barreiro, Beatriz I Vázquez, Alberto Cepeda
β-Agonists or β-adrenergic agonists are synthetic drugs sometimes used for therapeutic purposes in veterinary medicine. However, these compounds also belong to a class of illegal growth promoters that decrease the fat content in farm animals. The purpose of this study was to develop an analytical LC-MS/MS confirmatory method for the detection of nine β-agonists in bovine retina and liver tissues. The obtained CCα values ranged from 0.29 to 1.54 µg kg(-)(1) in retina and from 0.03 to 0.18 µg kg(-)(1) in liver, and CCβ values from 0...
December 23, 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
#18
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 intra-laboratory-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 calculated quantification limits of 24...
December 21, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27915587/determination-of-testosterone-esters-and-estradiol-esters-in-bovine-and-porcine-blood-serum
#19
Martina Rejtharová, Libor Rejthar, Katarína Čačková
Monitoring of steroid esters in blood serum is desirable in order to detect the possible illegal use of natural hormones as growth promoters. A method for the 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 20, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/27981891/lc-ms-ms-methods-for-albendazole-analysis-in-feed-and-its-metabolite-residues-in-fish-fillet-and-a-leaching-study-in-feed-after-alternative-procedure-for-drug-incorporation
#20
Zenaís Busatto, Agnaldo Fernando Baldo da Silva, Osvaldo de Freitas, Jonas Augusto Rizzato Paschoal
This paper describes the development of analytical methods for the quantification of albendazole (ABZ) in fish feed and ABZ and its main known metabolites (albendazole sulfoxide, albendazole sulfone and albendazole aminosulfone) in fish fillet employing LC-MS/MS. In order to assess the reliability of the analytical methods, evaluation was undertaken as recommended by related guides proposed by the Brazilian Ministry of Agriculture for analytical method validation. The calibration curve for ABZ quantification in feed showed adequate linearity (r > 0...
December 16, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
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