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

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https://www.readbyqxmd.com/read/29451853/graphene-oxide-coated-stir-bar-sorptive-extraction-of-trace-aflatoxins-from-soy-milk-followed-by-high-performance-liquid-chromatography-laser-induced-fluorescence-detection
#1
Haiyan Ma, Congcong Ran, Mengjiao Li, Jinglin Gao, Xinyu Wang, Lina Zhang, Jing Bian, Junmei Li, Ye Jiang
Mycotoxins are potential food pollutants produced by fungi. Among them, aflatoxins (AFs) are the most toxic. Therefore, AFs were selected as models, and a sensitive, simple and green graphene oxide (GO)-based stir bar sorptive extraction (SBSE) method was developed for extraction and determination of AFs with high performance liquid chromatography-laser-induced fluorescence detector (HPLC-LIF). This method improved the sensitivity of AFs detection and solved the deposition difficulty of the direct use of GO as adsorbent...
February 16, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29451850/determination-of-14-aminoglycosides-by-lc-ms-ms-using-molecularly-imprinted-polymer-solid-phase-extraction-for-clean-up
#2
Marie-Claude Savoy, Pei Mun Woo, Pauline Ulrich, Adrienne Tarres, Pascal Mottier, Aurélien Desmarchelier
A LC-MS/MS method for screening fourteen aminoglycosides in foodstuffs of animal origin is presented. Its scope includes raw materials and processed ingredients but also finished products composed of milk, meat, fish, egg or fat. Aminoglycosides are extracted in an acidic aqueous solution, which is first recovered after centrifugation, then diluted with a basic buffer and finally purified by molecularly imprinted polymer-solid phase extraction (MIP-SPE). Analytes are detected within 8 min by ion-pair reversed phase LC-MS/MS...
February 16, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29448893/arsenic-species-in-rice-and-rice-based-products-consumed-by-toddlers-in-switzerland
#3
Roxane Guillod-Magnin, Beat J Brüschweiler, Rafael Aubert, Max Haldimann
Inorganic arsenic (iAs) is a contaminant present in food, especially in rice and rice-based products. Toxicity of arsenic compounds (As) depends on species and oxidative state. Inorganic arsenic species, such as arsenite (As(III)) and arsenate (As(V)), are more bioactive and toxic than organic arsenic species, like methylarsonic acid (MMA(V)) and dimethylarsinic acid (DMA(V)) or arsenosugars and arsenobetaine. An ion chromatography-inductively coupled plasma-mass spectroscopy (IC-ICP-MS) method was developed to separate the four following arsenic anions: As(III), As(V), MMA(V) and DMA(V)...
February 16, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29448903/effects-of-different-types-of-soy-sauce-on-the-formation-of-heterocyclic-amines-in-roasted-chicken
#4
Syifaa A S, S Jinap, Md Jahurul Haque Akanda, Maimunah Sanny, A Khatib
The objective of the study was to determine the effect of different types of soy sauce and marinating time on the formation of heterocyclic amines (HCAs) in roasted chicken. Chicken breast samples were marinated with sweet, salty, light and dark soy sauce at 0, 3, 6 and 12 hours (control treatment was the chicken without marinade). The concentrations of free amino acids, sugars and creatinine were determined before roasting while HCA concentrations were determined after roasting. All types of soy sauce significantly increased (p ≤ 0...
February 15, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29448899/dietary-exposure-of-the-belgian-population-to-emulsifiers-e481-sodium-stearoyl-2-lactylate-and-e482-calcium-stearoyl-2-lactylate
#5
Sarah Bel, Thomas Struyf, Tine Fierens, Griet Jacobs, Christine Vinkx, Mia Bellemans, Stefan Voorspoels, Karin De Ridder
A dietary exposure assessment of food emulsifiers E481 (sodium stearoyl-2-lactylate) and E482 (calcium stearoyl-2-lactylate) in the Belgian population was performed. Nationally representative food consumption data from the Belgian National Food Consumption Surveys 2004 (BNFCS2004) and 2014 (BNFCS2014) were used for calculations. A conservative approach (combining individual food consumption data with the maximum permitted level (MPL) of foods (tier 2), was compared with more refined estimates (combining individual food consumption data with actual concentrations measured in food products available on the Belgian market (tier 3))...
February 15, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29447587/a-photochemically-induced-fluorescence-based-flow-through-optosensor-for-screening-of-nitenpyram-residues-in-cruciferous-vegetables
#6
J Jiménez-López, P Ortega-Barrales, A Ruiz-Medina
One of the most used agrochemicals in agricultural production, nitenpyram (NTP), has been determined by using a flow-through optosensing device based on Photochemically Induced Fluorescence (PIF) detection. The combination of both methodologies allows, on one hand, a quick on-line photodegradation of NTP and, on the other hand, the preconcentration, quantification and desorption of the fluorescent photoproduct generated when retained on Sephadex QAE-A25 as solid support, which was monitored at 295 and 362 nm for excitation and emission, respectively...
February 15, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29447580/hplc-pda-determination-of-carminic-acid-and-4-aminocarminic-acid-using-relative-molar-sensitivities-with-respect-to-caffeine
#7
Yuzo Nishizaki, Naoko Sato-Masumoto, Aki Yokota, Tsuyoshi Mikawa, Koichi Nakashima, Taichi Yamazaki, Miho Kuroe, Masahiko Numata, Toshihide Ihara, Yusai Ito, Naoki Sugimoto, Kyoko Sato
To accurately determine carminic acid (CA) and its derivative 4-aminocarminic acid (4-ACA), a novel, high-performance liquid chromatography with photodiode array detector (HPLC/PDA) method using relative molar sensitivity (RMS) was developed. The method requires no analytical standards of CA and 4-ACA; instead it uses the RMS values with respect to caffeine (CAF), which is used as an internal standard. An off-line combination of 1 H-quantitative nuclear magnetic resonance spectroscopy ( 1 H-qNMR) and HPLC/PDA was able to precisely determine the RMSs of CA 274nm /CAF 274nm and 4-ACA 274nm /CAF 274nm ...
February 15, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29447579/double-gene-targeting-pcr-assay-for-the-detection-of-crocodylus-porosus-in-commercial-products
#8
Nina Naquiah, Md Eaqub Ali, M A Motalib Hossain, Sharmin Sultana, Mohammad Nasir Uddin Ahamad
The demand for crocodile meat is quickly growing because of its exotic and organoleptic appeal and also low content of cholesterol and lipids. Moreover, crocodile oil and blood have been used in alternative medicines for treating asthma and several other ailments since ancient times. Furthermore, crocodile hides have great demand in leather industries. All of these have collectively contributed to the extensive hunting, illegal trading and consequent decline of crocodiles in most parts of the world. To keep space with the growing demands, some crocodile species such as Crocodylus porosus have been raised in farms and its commercial trades have been legalized...
February 15, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29388906/identification-of-antibiotic-mycelia-residue-in-protein-rich-feed-using-on-near-infrared-microscopy-imaging
#9
Yufei Lin, Zengling Yang, Hao Liang, Shouxue Li, Xia Fan, Zhiming Xiao
Antibiotic mycelial residues (AMRs) added to animal feeds easily lead to drug resistance that affects human health and environment. However, there is a lack of effective detection methods, especially a fast and convenient detection technology, to distinguish AMRs from other components in animal feeds. To develop effective detection methods, two types of global Mahalanobis distance (GH) algorithms based on near-infrared microscopy (NIRM) imaging are proposed. The aim of this study is to investigate the feasibility of using NIRM imaging to identify AMRs in soybean meals...
February 1, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29388892/food-safety-traits-of-mussels-and-clams-distribution-of-pcbs-pbdes-ocps-pahs-and-pfass-in-sample-from-different-areas-using-hrms-orbitrap%C3%A2-and-modified-quechers-extraction-followed-by-gc-ms-ms
#10
Luca Maria Chiesa, Maria Nobile, Renato Malandra, Davide Pessina, Sara Panseri, Giuseppe Federico Labella, Francesco Arioli
Reviewing the presence of contaminant residues is important both for food safety and monitoring of environmental pollution. Here, the occurrence of 6 polychlorinated biphenyls (PCBs), 15 organochlorine pesticides (OCPs), 7 polybrominated diphenyl ethers (PBDEs), 4 polycyclic aromatic hydrocarbons (PAHs) and 17 perfluoroalkyl substances (PFASs) was evaluated in mussels and clams. A liquid chromatography-high resolution mass spectrometry (HPLC-HRMS) and an innovative QuEChERS extraction followed by gas chromatography-tandem mass spectrometry (GC-MS/MS) methods were developed, validated and applied...
February 1, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29377789/influence-of-grass-pellet-production-on-pyrrolizidine-alkaloids-occurring-in-senecio-aquaticus-infested-grassland
#11
Christoph Gottschalk, Johannes Ostertag, Karsten Meyer, Klaus Gehring, Stefan Thyssen, Manfred Gareis
1,2-Dehydro-pyrrolizidine alkaloids (PA) and their N-oxides (PANO) exhibit acute and chronic toxic effects on the liver and other organs and therefore are a hazard for animal and human health. In certain regions of Germany an increasing spread of Senecio spp. (ragwort) on grassland and farmland areas has been observed during the last years leading to a PA/PANO-contamination of feed and food of animal and plant origin. This project was carried out to elucidate whether the process of grass pellet production applying hot air drying influences the content of PA and PANO...
January 29, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29377767/dietary-exposure-to-cadmium-of-shenzhen-adult-residents-from-a-total-diet-study
#12
Zhou Wang, Liubo Pan, Guihua Liu, Huimin Zhang, Jinzhou Zhang, Jie Jiang, Ying Xiao, Weibin Bai, Rui Jiao, Wei Huang
Cadmium (Cd) contamination has become a public health concern in recent decades. The aim of the present study was to assess the contribution of dietary Cd exposure and its health risk among Shenzhen adult residents using the Total Diet Study (TDS) approach. Cd was determined in 13 food groups using 276 individual samples by ICP-MS. The major food contributors to Cd exposure of Shenzhen adult residents were "Vegetables" (32.6% of the total exposure), "Rice and its products" (19.2% of the total exposure) and "Fish, seafood and shellfish" (18...
January 29, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29377766/high-occurrence-rates-of-enrofloxacin-and-ciprofloxacin-residues-in-retail-poultry-meat-revealed-by-an-ultra-sensitive-mass-spectrometric-method-and-antimicrobial-resistance-to-fluoroquinolones-in-campylobacter-spp
#13
Iveta Pugajeva, Jeļena Avsejenko, Elza Judjallo, Aivars Bērziņš, Elena Bartkiene, Vadims Bartkevics
An ultra-sensitive mass spectrometric confirmation and quantification method for the determination of selected fluoroquinolones - enrofloxacin and its main metabolite ciprofloxacin - was developed and validated in poultry meat samples. The achieved limits of quantification were 1 ng kg-1 for enrofloxacin and 10 ng kg-1 for ciprofloxacin. The analysis of 40 retail poultry samples originating from Estonia, Latvia, Lithuania, Poland and France, revealed that 93% of samples contained residues of enrofloxacin in range from 3...
January 29, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29377761/ozone-treatment-to-reduce-deoxynivalenol-don-and-zearalenone-zen-contamination-in-wheat-bran-and-its-impact-on-nutritional-quality
#14
Allana Patrícia Santos Alexandre, Rafael Segundo Vela-Paredes, Amanda Silva Santos, Naiara Silva Costa, Solange Guidolin Canniatti-Brazaca, Maria Antonia Calori-Domingues, Pedro Esteves Duarte Augusto
Wheat bran is an important source for human and animal feed. Its nutritional aspects include a high content of fiber and minerals, as well as phenolic compounds that help prevent chronic diseases. However, wheat can be susceptible to contamination by fungus, which can produce mycotoxins such as deoxynivalenol (DON) and zearalenone (ZEN), causing adverse health effects. Therefore, methods should be developed to reduce possible contamination. Ozone can be used for this purpose as it is considered safe and environmentally friendly...
January 29, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29377759/stability-study-of-veterinary-drugs-in-standard-solutions-for-lc-ms-ms-screening-in-food
#15
Aurélien Desmarchelier, Philipp Feuerrigel, Hassan Fathi Ahmed, Julie Moulin, Andrea Beck, Claudia Mujahid, Thomas Bessaire, Marie-Claude Savoy, Pascal Mottier
A study on stability of veterinary drugs in standard solutions stored at -80 °C and at -20 °C was conducted over one year. Data were acquired on 152 individual stock standard solutions and also on 15 family mixes and 2 working standard solutions. All solutions were prepared, stored and compared one year later against freshly prepared ones by liquid chromatography-tandem mass spectrometry. A statistical analysis was performed to set acceptability criteria, taking into account the variability of standard preparations...
January 29, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29368583/determination-of-quinolone-residues-in-raw-cow-milk-application-of-polar-stir-bars-and-ultra-high-performance-liquid-chromatography-tandem-mass-spectrometry
#16
Rocío Rodríguez-Gómez, María Teresa García-Córcoles, Morsina Çipa, Dolores Barrón, Alberto Navalón, Alberto Zafra-Gómez
Seventeen quinolone antibiotics were determined in cows' milk. A method of high sensitivity, selectivity and accuracy was developed. Accuracy (trueness and precision), linearity, sensitivity, selectivity, decision limit and detection capability were established following the recommendations of the Commission Decision 2002/657/EC and the Food and Drug Administration (FDA) guideline. The use of polar stir-bar sorptive extraction (SBSE) prior to UHPLC-MS/MS analysis is proposed. The variables that affect SBSE were optimized using multivariate optimization strategies...
January 25, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29324088/validation-of-a-rapid-lateral-flow-method-for-the-detection-of-cows-milk-in-water-buffalo-sheep-or-goat-milk
#17
Patricia Galan-Malo, Isabel Mendiara, Pedro Razquin, Luis Mata
For many years, the adulteration of milk from sheep, goats or water buffalos with cows' milk has been a widespread practice due to the higher cost of milk from those other species. Because of this, great concern has been shown by many Protected Designation of Origin councils that have to assure the quality and genuineness of the cheese produced by their associates. Therefore, the whole production chain needs analytical tools that allow the control of potential adulteration. Rapid methods to be used in the field are scarce and have not been validated according to international guidelines...
January 22, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29346037/development-of-an-ultrasensitive-pcr-assay-for-polycyclic-musk-determination-in-fish
#18
Xiaohan Zhang, Huisheng Zhuang
Polycyclic musks (PCMs) in the aquatic environment and organisms have become an emerging environmental issue because of their potential risk. The most used method for polycyclic musk determination is gas chromatography-mass spectrometry (GC-MS) with different sample extractions, which are somewhat expensive to operate, complex and laborious. In this study, a novel and ultrasensitive real-time polymerase chain reaction (PCR) assay with multiple signal amplification of carboxylic-DNA by gold nanoparticle-polyamidoamine conjugation (Au-PAMAM) was developed for determining polycyclic musks in fish...
January 18, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29346035/determination-of-105-antibiotic-anti-inflammatory-antiparasitic-agents-and-tranquilizers-by-lc-ms-ms-based-on-an-acidic-quechers-like-extraction
#19
Aurélien Desmarchelier, Kaïli Fan, Mai Minh Tien, Marie-Claude Savoy, Adrienne Tarres, Denis Fuger, Alexandre Goyon, Thomas Bessaire, Pascal Mottier
A procedure for screening 105 veterinary drugs in foods by liquid chromatography tandem mass-spectrometry (LC-MS/MS) is presented. Its scope encompasses raw materials of animal origin (milk, meat, fish, egg and fat) but also related processed ingredients and finished products commonly used and manufactured by food business operators. Due to the complexity of the matrices considered and to efficiently deal with losses during extraction and matrix effects during MS source ionisation, each sample was analyzed twice, that is "unspiked" and "spiked at the screening target concentration" using a QuEChERS-like extraction...
January 18, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29338668/simultaneous-determination-of-afidopyropen-and-its-metabolite-in-vegetables-fruit-and-soil-using-uhplc-ms-ms
#20
Kaiying Chen, Xingang Liu, Xiaohu Wu, Fengshou Dong, Jun Xu, Yongquan Zheng
A new analytical method using the quick, easy, cheap, effective, rugged and safe (QuEChERS) procedure for simultaneous determination of afidopyropen and its metabolite M440I007 residues in tomato, watermelon, pepper, cucumber, pear, grape, cabbage and soil samples was developed using ultra-high performance liquid chromatography coupled with tandem mass spectrometry. The target compound was determined in less than 5.0 min using an electrospray ionisation source in positive mode (ESI+). The limit of quantification was 1 μg kg-1 in different matrices...
January 17, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
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