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

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https://www.readbyqxmd.com/read/29219766/development-and-validation-of-multi-residue-and-multi-class-method-for-antibacterial-substances-analysis-in-non-target-feed-by-liquid-chromatography-tandem-mass-spectrometry
#1
Ewelina Patyra, Carolina Nebot, Rosa Elvira Gavilán, Alberto Cepeda, Krzysztof Kwiatek
A confirmatory HPLC-MS/MS method for the determination of residues of eleven antibacterial substances from different therapeutic class (β-lactams, lincosamides, fluoroquinolones, macrolides, pleuromutilins and sulfonamides) in animal feeds has been developed. The sample preparation is based on extraction with 0.1% formic acid in acetonitrile. Separation of the analytes was performed on biphenyl column with a gradient of 0.1% formic acid in acetonitrile and 0.1% formic acid in Milli-Q water. The developed method was validated following the guidelines included in the European Union Commission Decision 2002/657/EC...
December 8, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29219744/n-nitrosamines-migrating-from-food-contact-materials-into-food-simulants-analysis-and-quantification-by-means-of-hplc-apci-ms-ms
#2
Friederike Kühne, Oliver Kappenstein, Samira Straβgütl, Florian Weese, Jürgen Weyer, Karla Pfaff, Andreas Luch
It was the aim of the work described here to develop a validated analytical method for the determination N-nitrosamines in food simulants. Here, we present the validation of a liquid chromatography-atmospheric pressure chemical ionisation-tandem mass spectrometry (LC-APCI-MS/MS) method for the determination of thirteen N-nitrosamines in the food simulants deionised water, 3 % acetic acid and 10 % ethanol. Method validation encompassed linearity, limit of detection (LOD), limit of quantification (LOQ), recovery, precision and stability of the N-nitrosamines...
December 8, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29219742/dietary-exposure-and-risk-assessment-of-polychlorinated-dibenzo-p-dioxins-polychlorinated-dibenzofurans-and-dioxin-like-polychlorinated-biphenyls-of-the-population-in-the-region-of-valencia-spain
#3
Leyre Quijano, Silvia Marín, Encarnación Millan, Vicent Yusà, Guillermina Font, Olga Pardo
Dietary exposure of the Valencia Region population to polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and polychlorinated biphenyls (PCBs) was assessed in the Region of Valencia in 2010-2011. A total of 7700 food samples were collected. Occurrence data were combined with consumption data to estimate dietary exposure in adults (> 15 years of age) and young people (6-15 years of age). The estimated intake was calculated by a probabilistic approach. Average intake levels (upper-bound scenario) were 1...
December 8, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29210618/simultaneous-determination-of-kasugamycin-and-validamycin-a-residues-in-cereals-by-consecutive-solid-phase-extraction-combined-with-liquid-chromatography-tandem-mass-spectrometry
#4
Hong Zhang, Chenchen Wang, Huidong Li, Yan Nie, Liping Fang, Zilei Chen
Two polar aminoglycosides, kasugamycin and validamycin-A were determined in cereals (brown rice, wheat and corn) by high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). The analytes were extracted from samples using methanol and water (70:30, v/v) at pH 5.5, purified using both a hydrophilic-hydrophobic-balanced (HLB) cartridge and strong cation exchange (SCX) cartridge, and then analyzed using multiple reaction monitoring (MRM) in positive electrospray ionization mode with a special ReproSil 100 C18 HPLC column...
December 6, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29210615/dietary-exposure-to-non-dioxin-like-pcbs-of-the-hong-kong-adult-population-from-a-total-diet-study
#5
S W C Chung, J S Y Lau, J Y K Chu
Dietary exposure of the Hong Kong adults to the sum of the six indicator PCBs (Σ6 PCBs; PCB 28, 52, 101, 138, 153, and 180) was estimated in this study using the Total Diet Study (TDS) approach. Seventy one commonly-consumed food items of animal origin were sampled in four seasons and prepared as consumed in 2010-11. The results showed that the main dietary source of Σ6 PCBs to the adult population was "fish, seafood and their products" which accounted for 84.3% of the total exposure. About 50% of the total exposure was contributed by four fish species: salmon (cooked salmon and salmon sashimi (19...
December 6, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29210614/recycled-paperboard-with-a-barrier-layer-for-food-contact-set-off-during-stacking-or-reeling-analytical-method-and-preliminary-results
#6
Celine Munoz, Angela Eicher, Maurus Biedermann, Koni Grob
The use of recycled paperboard for packaging dry foods is in the interest of sustainability of resources, but in most applications, the food must be protected against contamination, such as by a functional barrier on the internal surface of the paperboard box. After application, the paperboard is usually stacked or reeled before making boxes. During this period, the food contact surface of the barrier layer is in contact with the outer side of the paperboard, which may result in set-off and subsequent contamination of food...
December 6, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29210611/tracking-residual-organochlorine-pesticides-ocps-in-green-herbal-and-black-tea-leaves-and-infusions-of-commercially-available-tea-products-marketed-in-poland
#7
Agata Witczak, Hassan Abdel-Gawad, Michal Zalesak, Anna Pohoryło
The content of residual organochlorine pesticides (OCPs) was examined in green, herbal, and black tea leaves as well as in their infusions prepared from tea products marketed in the main supermarkets in Poland. It was found that the detected mean levels of organochlorine residues in tea leaves ranged from <LOD to 16.36 ng g-1 dry weight. Among HCH isomers γ-HCH in green tea occurred in the highest concentrations. Of DDT metabolites the highest level of pp'DDT (1.96 ng g-1 dw) was in green tea samples. The transfer of OCPs from tea leaves to brew was investigated...
December 6, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29210610/effects-of-feeding-bentonite-clay-upon-ochratoxin-a-induced-immunosuppression-in-broiler-chicks
#8
Aisha Khatoon, Muhammad Zargham Khan, Zain Ul Abidin, Sheraz Ahmed Bhatti
A presence of mycotoxins in feed is one of the most alarming issue in the poultry feed industry. Ochratoxins, produced by several Aspergillus and Penicillium species, are important mycotoxin regarding the health status of poultry birds. Ochratoxins are further classified into to several sub-types depending upon their chemical structures i.e. ochratoxin A, B, C etc but ochratoxin A (OTA) is considered to be most important and toxic one. Bentonite clay, belonging to phyllosilicates and formed from weathering of volcanic ashes, has the adsorbing ability for several mycotoxins...
December 6, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29210609/dietary-intakes-of-six-intense-sweeteners-by-irish-adults
#9
Maria Buffini, Séverine Goscinny, Ir Joris Van Loco, Anne P Nugent, Janette Walton, Albert Flynn, Michael J Gibney, Breige A McNulty
This research investigated the intakes of six intense sweeteners; acesulfame-K (E950), aspartame (E951), cyclamate (E952), saccharin (E954), sucralose (E955) and steviol glycosides (E960) in the diets of Irish adults, using data from the National Adult Nutrition Survey (NANS). A food label survey which included products currently available on the Irish market supplemented the analysis. Sweetener intakes were investigated using three different exposure scenarios; beginning with a crude assessment which assumed that all foods permitted to contain the additives of interest always did contain them, and at their maximum permitted level (Tier 1)...
December 6, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29210608/occurrence-and-risk-assessment-of-population-exposed-to-deoxynivalenol-in-foods-derived-from-wheat-flour-in-brazil
#10
Milena Veronezi Silva, Giseli Cristina Pante, Jéssica Cristina Zoratto Romoli, Alexandra Perdigão Maia de Souza, Gustavo Henrique Oliveira da Rocha, Flavio Dias Ferreira, Adriane Lettnin Roll Feijó, Salesia Maria Prodócimo Moscardi, Karina Ruaro de Paula, Erika Bando, Samuel Botião Nerilo, Miguel Machinski
Deoxynivalenol (DON) is the most important of the trichothecenes in terms of amounts and occurrence in wheat. This compound was show to be associated with a glomerulonephropathy involving an increase of immunoglobulin A in humans. This study assessed the occurrence of DON in wheat flour and the exposure of Brazilian teenagers, adults and elderly to this mycotoxin due to intake of wheat flour-based products. DON extraction in wheat flour was carried out by solid phase extraction and the quantification was performed by ultra-high proficiency liquid chromatography with diode-array detection...
December 6, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29210606/development-and-validation-of-a-confirmatory-method-for-the-determination-of-stilbene-estrogens-in-ostrich-serum
#11
Ovokeroye Akpojevwe Abafe, Pumza M Gatyeni, Tlou Chokwe
A simple and accurate ultra-high performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS) method was developed and validated for the first time as a confirmatory method for the simultaneous determination of stilbenes - hexestrol and diethylstibestrol in serum. Extraction was based on a simple acid denaturation of protein followed by liquid-liquid extraction using methyl tert butyl ether (MTBE). Extracts were directly injected into the UHPLC-MS/MS without further purification. Excellent recoveries in the range 82 - 99 % and 91 - 128 % were obtained for hexestrol and diethylstibestrol, respectively...
December 6, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29210600/potential-silver-nanoparticles-migration-from-commercially-available-polymeric-baby-products-into-food-simulants
#12
Jeong In Choi, Song Ji Chae, Jung Min Kim, Jae Chun Choi, Se Jong Park, Hee Ju Choi, Hojae Bae, Hyun Jin Park
In recent years, silver nanoparticles (AgNPs) have been extensively employed in food packaging systems as a potential antibacterial agent. Although proven to be highly effective, increased number of AgNP-containing products raises concerns among consumers regarding the migration of AgNPs from the packaging material into foods which may exert toxic effects. To address this, five baby products were chosen (baby bottle A, baby bottle B, pacifier A, pacifier B, and breastmilk storage bag) to investigate AgNPs migration into three food simulants (deionized water, 4% acetic acid (w/v), and 50% ethanol (v/v)) using inductively coupled plasma mass spectrometry (ICP-MS)...
December 6, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29160759/sensitivity-enhancement-of-aminoglycosides-in-hydrophilic-interaction-liquid-chromatography-with-tandem-mass-spectrometry-by-post-column-addition-of-trace-sodium-acetate-in-methanol
#13
Daichi Asakawa, Masako Uemura, Takanori Sakiyama, Testuo Yamano
The development of a sensitive and accurate analytical method for monitoring aminoglycosides in food, environmental, and clinical samples is needed for many purposes. This study found that the responses of sodiated and protonated aminoglycosides in hydrophilic interaction chromatography with tandem mass spectrometry were enhanced upon addition of sodium acetate in methanol (5 mg L(-1) at a flow rate of 0.2 mL min(-1)) as a post-column reagent. The sensitivities of sodiated spectinomycin, kanamycin, gentamicins, neomycin, and amikacin were significantly higher than those of the protonated molecules...
November 21, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29143575/determination-of-illegal-adulteration-of-dietary-supplements-with-synthetic-hair-growth-compounds-by-uplc-and-lc-q-tof-ms
#14
Ji Hyun Lee, Gihaeng Kang, Han Na Park, Jihee Kim, Nam Sook Kim, Seongsoo Park, Sung-Kwan Park, Sun Young Baek, Hoil Kang
In this study, we developed a UPLC-PDA and LC-Q-TOF/MS method to identify and measure the following prohibited substances that may be found in dietary supplements: triaminodil, minoxidil, bimatoprost, alimemazine, diphenylcyclopropenone, α-tradiol, finasteride, methyltestosterone, spironolatone, flutamide, cyproterone, dutasteride, and testosterone 17-propionate.The method was validated according to International Conference on Harmonization guidelines in terms of specificity, linearity, accuracy, precision, LOD, LOQ, recovery, and stability...
November 16, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29134875/editorial
#15
John Gilbert, Tim Phillips, Elke Anklam, Richard Stadler
No abstract text is available yet for this article.
November 14, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29095130/comparability-of-mineral-oil-testing-for-dry-food-and-cardboard-samples-perspectives-from-different-pt-rounds
#16
Milena Funk, Hedda Hillmann, Ralph Derra, Ulrich Leist
Mineral oil hydrocarbons (MOH) can be found in detectable levels in a multitude of foodstuffs. Therefore, chemical analysis of food for MOH gains importance. Different proficiency testing (PT) rounds on mineral oil testing have been performed in different matrices: cereals and rice as well as cardboard samples were examined. The laboratories participating in the PT rounds had to follow specific requirements for examination. The sample materials used contained different concentrations of mineral oil saturated hydrocarbons (MOSH) and mineral oil aromatic hydrocarbons (MOAH)...
November 14, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29095118/screening-and-quantification-of-18-glucocorticoid-adulterants-from-herbal-pharmaceuticals-and-health-foods-by-hplc-and-confirmed-by-lc-q-tof-ms-ms
#17
Pengfei Jin, Xiaoli Liang, Xuejun Wu, Xiaorong He, Yongmei Kuang, Xin Hu
A procedure for the screening and quantification of 18 glucocorticoids, i.e. hydrocortisone sodium succinate (HSS), prednisolone (PDL), prednisone (PDS), hydrocortisone (HCS), methylprednisolone (MPS), betamethasone (BTM), dexamethasone (DXM), triamcinolone acetonide (TA), prednisolone acetate (PLA), hydrocortisone acetate (HA), fludrocortisone acetate (FA), prednisone acetate (PA), cortisone acetate (CA), dexamethasone acetate (DA), hydrocortisone butyrate (HB), triamcinolone acetonide acetate (TAA), fluocinonide (FN) and halcinonide (HC) from herbal pharmaceuticals and health foods was established and fully validated...
November 14, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29095112/assessment-of-elimination-profile-of-albendazole-residues-in-fish
#18
Zenaís Busatto, Welliton Gonçalves de França, José Eurico Possebon Cyrino, Jonas Augusto Rizzato Paschoal
Few drugs are specifically regulated for aquaculture. Thus this study considered albendazole (ABZ) as a potential drug for use in fish, which, however, is not yet regulated for this application. ABZ is a broad-spectrum anthelmintic approved for farmed ruminants and recently considered for treatment of fish parasites. It is the subject of careful monitoring because of potential residues in animal products. This study evaluated the depletion of ABZ and its main known metabolites: albendazole sulfoxide - ABZSO, albendazole sulfone - ABZSO2 and albendazole amino sulfone - ABZ-2-NH2SO2, in the fillets of the Neotropical Characin pacu, Piaractus mesopotamicus, which were fed diets containing 10 mg ABZ kg(-1) body weight in a single dose...
November 14, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29111888/stability-of-don-and-don-3-glucoside-during-baking-as-affected-by-the-presence-of-food-additives
#19
Arnau Vidal, Vicente Sanchis, Antonio J Ramos, Sonia Marín
The mycotoxin deoxynivalenol (DON) is one of the most common mycotoxins of cereals worldwide, and its occurrence has been widely reported in raw wheat. The free mycotoxin form is not the only route of exposure; modified forms can also be present in cereal products. Deoxynivalenol-3-glucoside (DON-3-glucoside) is a common DON plant conjugate. The mycotoxin concentration could be affected by food processing; here, we studied the stability of DON and DON-3-glucoside during baking of small doughs made from white wheat flour and other ingredients...
November 7, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29111886/predictive-modelling-of-the-exposure-to-steviol-glycosides-in-irish-patients-aged-1-3-years-with-phenylketonuria-and-cow-s-milk-protein-allergy
#20
Aaron J O'Sullivan, Sandrine Pigat, Cian O'Mahony, Michael J Gibney, Aideen I McKevitt
Children with Phenylketonuria (PKU) and severe cow's milk protein allergy (CMPA) consume prescribed, specially formulated, foods for special medical purposes (FSMPs) as well as restricted amounts of normal foods. These patients are exposed to artificial sweeteners from the consumption of a combination of free and prescribed foods. Young patients with PKU and CMPA have a higher risk of exceeding acceptable daily intakes (ADI) for additives than age-matched healthy children. A predictive modelling approach has been adapted successfully to assess the additive exposure of young patients with PKU and CMPA to artificial sweeteners...
November 7, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
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