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

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https://www.readbyqxmd.com/read/30650040/validation-and-quantification-of-neonicotinoid-insecticide-residues-in-rice-whole-grain-and-rice-straw-using-lc-ms-ms
#1
S Karthikeyan, A Suganthi, K Bhuvaneswari, J S Kennedy
An efficient analytical method was developed and validated using a modified QuEChERS method and LC-MS/MS for the detection and quantification of neonicotinoid insecticide residues in rice whole grain and rice straw. The samples were extracted using acetonitrile and cleaned up by dispersive solid-phase extraction. Validation based on five fortification levels showed good recoveries of neonicotinoids ranging from 75% to 116 % and 60% to 105 % for rice whole grain and straw, respectively. The precision ranged between 3% and 17 %, and 2% and 10 % for grain and straw, respectively...
January 16, 2019: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/30650038/novel-sequential-separation-and-determination-of-a-quaternary-mixture-of-fungicides-by-using-an-automatic-fluorimetric-optosensor
#2
I Delgado-Blanca, A Ruiz-Medina, P Ortega-Barrales
A versatile flow-through multi-optosensor is proposed for the separation and spectrofluorimetric determination of mixtures of four widely used pesticides: carbendazim, thiabendazole, carbaryl and o-phenylphenol at µg g-1 levels in fruits. The flow system is based on the online pre-concentration and separation of the pesticides on a solid sensing microzone, followed by the sequential measurement of their native fluorescence. The separation of the pesticides takes place on a solid support located in the same flow cell, on which analytes are temporarily immobilized and separated from the matrix due to their different retention/desorption kinetics when they interact with the C18 silica gel microbeads...
January 16, 2019: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/30650036/formation-of-heterocyclic-aromatic-amines-in-doner-kebab-cooked-with-different-methods-at-varying-degrees-of-doneness
#3
Nesrin Özsaraç, Nuray Kolsarici, Eda Demirok Soncu, Güliz Haskaraca
This study was designed to determine the formation of heterocyclic aromatic amines (HCAs) in two different types of doner kebab (yaprak doner-YD or mix doner-MD) cooked with different cooking methods (gas or electric) at varying degrees of doneness (rare, medium, well-done). In doner samples, nine common HCAs (IQ, IQx, MeIQ, MeIQx, PhIP, 4,8-DiMeIQx, 7,8-DiMeIQx, AαC, MeAαC) were detected. Additionally, the changes in the HCA precursors were evaluated. The initial concentration of precursors gradually decreased with the increase in doneness degree due to degradation or possible contribution in the Maillard reaction to form HCA compounds as a result of heat treatment (p < 0...
January 16, 2019: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/30650035/wild-mushroom-consumption-by-pickers-in-the-south-of-spain-a-probabilistic-approach
#4
Carlos Ostos-Ruiz, Rafael Moreno-Rojas, Susana Ferrer-Bas, Baldomero Moreno-Arroyo, Alicia Moreno-Ortega, Fernando Cámara-Martos
A survey has been made of 300 habitual consumers of the eight species of wild mushrooms most often consumed in the south of Spain. The eight species selected constitute over 95% of the intake of this food in the samples studied. The mean consumption per capita of mushrooms in Spain is of 10.4 kg/year, 8.6 kg of which are consumed during the season, which lasts from between 1 and 3 months. Male pickers from the Huelva province were those who presented the largest intake, their age group being highly influenced by the species...
January 16, 2019: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/30650034/concentration-of-morpholine-residues-in-major-fruits-and-juices-and-its-dietary-exposure-in-china
#5
Pei Cao, Da-Wei Chen, Jiang Liang, Ping-Gu Wu, Sheng Wen, Jing Wei, Si-Jie Liu, Xi-Mei Wu, Yun-Feng Zhao, Hai-Bin Xu
Morpholine is a common chemical used as emulsifier in the preparation of wax coatings for some fruit to help them remain fresh and protect against insects and fungal contamination. It has been reported that morpholine has acute toxic effects on rodents. In the present study, morpholine concentrations were analysed in fruits (citrus fruits, apples, strawberries and grapes) and juices (apple juice and orange juice) in order to determine dietary exposure among the Chinese population. A total of 732 fruit and juice samples were collected during 2015-2016, which covered major foods in China...
January 16, 2019: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/30650025/discovery-of-potential-transcriptional-biomarkers-in-broiler-chicken-for-detection-of-amantadine-abuse-based-on-rna-sequencing-technology
#6
Xinyong You, Meijuan Xu, Qiong Li, Kunpeng Zhang, Guizeng Hao, Huaide Xu
The aim of this study was to identify candidate transcriptional biomarkers so as to provide a new method for monitoring amantadine residues during the feeding of broiler chicken. RNA sequencing (RNA-seq) and bioinformatic analyses were conducted to examine the transcriptomic changes and screen differentially expressed genes (DEGs) in broiler chicken breast muscle and liver tissues treated with amantadine. The results indicated that a total of 170 DEGs were screened from broiler chicken breast muscle tissues after amantadine was fed...
January 16, 2019: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/30650020/dietary-exposure-to-acrylamide-in-a-group-of-japanese-adults-based-on-24-hour-duplicate-diet-samples
#7
Junko Kawahara, Yazhi Zheng, Miho Terui, Akiko Shinohara, Kaori Uyama, Miyuki Yoneyama, Daisuke Nakajima, Yasuyuki Shibata, Shuichi Adachi
Acrylamide is a probable human carcinogen and known human neurotoxin that can be generated in food through heating. Using a mathematical modelling approach, our previous study estimated long-term average dietary exposure to acrylamide in the Japanese people; however, the validity of these estimates remained unknown. Here, we aimed to obtain a more accurate estimate of acrylamide exposure that would reflect the usual practice of heat processing and consumption of foods in the population. We collected duplicate diet samples and dietary records during 24 h from a group of Japanese adults...
January 16, 2019: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/30638440/influence-of-storage-environment-on-maize-grain-co-2-production-dry-matter-losses-and-aflatoxins-contamination
#8
E Garcia-Cela, E Kiaitsi, M Sulyok, R Krska, A Medina, I Petit Damico, N Magan
Poor storage of cereals, such as maize can lead to both nutritional losses and mycotoxin contamination. The aim of this study was to examine the respiration of maize either naturally contaminated or inoculated with Aspergillus flavus to examine whether this might be an early and sensitive indicator of aflatoxin (AF) contamination and relative storability risk. We thus examined the relationship between different interacting storage environmental conditions (0.80-0.99 water activity (aw ) and 15-35°C) in naturally contaminated and irradiated maize grain + A...
January 14, 2019: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/30633651/nuclear-dna-barcodes-for-cod-identification-in-mildly-treated-and-processed-food-products
#9
Valentina Paracchini, Mauro Petrillo, Antoon Lievens, Dafni-Maria Kagkli, Alexandre Angers-Loustau
Gadoids are a group of fish with historical importance in the fishing industry. The high demand for cod is one of the reasons why cod products are often mislabelled, and numerous observations have been made on the replacement of Atlantic cod (Gadus morhua) by cheaper species or its illegal capture in contravention of fish quotas. Fish species identification is traditionally based on morphological features, but this may be difficult in case of heat-treated or processed products, or where the species look similar, as in the Gadoid group...
January 11, 2019: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/30632947/hijiki-seaweed-consumption-elevates-levels-of-inorganic-arsenic-intake-in-japanese-children-and-pregnant-women
#10
Nathan Mise, Mayumi Ohtsu, Akihiko Ikegami, Atsuko Mizuno, Xiaoyi Cui, Yayoi Kobayashi, Yoshihiko Nakagi, Keiko Nohara, Takahiko Yoshida, Fujio Kayama
Although exposure to inorganic arsenic is a health concern, especially in developing foetuses and children, dietary exposure levels among pregnant women and children have not been extensively studied in Japan. To address this shortcoming, we completed a 3-day duplicate diet study for 104 children and 101 pregnant women in two cities, Shimotsuke, Tochigi and Asahikawa, Hokkaido. The levels of intake of total and inorganic arsenic were estimated using the concentrations of total and inorganic arsenic in food and drinking water measured by inductively coupled plasma-mass spectrometry...
January 11, 2019: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/30632927/risk-characterisation-from-the-presence-of-environmental-contaminants-and-antibiotic-residues-in-wild-and-farmed-salmon-from-different-fao-zones
#11
Luca Maria Chiesa, Maria Nobile, Federica Ceriani, Renato Malandra, Francesco Arioli, Sara Panseri
Salmon consumption is increasing year by year. Salmon aquaculture is the fastest growing food production system in the world, and often uses feed mixed with antibiotics or other drugs. Feed can be also contaminated by environmental contaminants like persistent organic pollutants and organophosphorus pesticides that usually accumulate in fatty tissue, or emerging contaminants such as perfluoroalkyl substances (PFASs), that instead bioaccumulate in protein tissues. Therefore, there is the need to investigate the presence of antibiotics and environmental contaminants, with multi-class and multi-residue liquid chromatography-high resolution mass spectrometry and gas chromatography tandem mass spectrometry methods to monitor a broad spectrum of residues comparing between wild and farmed salmons...
January 11, 2019: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/30632916/determination-residue-analysis-risk-assessment-and-processing-factor-of-pymetrozine-and-its-metabolites-in-chinese-kale-under-field-conditions
#12
Jin Gong, Kunming Zheng, Guoqiang Yang, Shan Zhao, Kankan Zhang, Deyu Hu
A simple determination method for pymetrozine and its metabolites in Chinese kale was developed using liquid chromatography with tandem mass spectrometry. The method had good linearity (R2  > 0.99), accuracy (recoveries of 73.2-94.1%) and precision (relative standard deviation of 2.5-9.8%). Field results showed that half-lives of pymetrozine were 3.0-4.1 d in Chinese kale, and terminal residue concentrations were all below the United States Environmental Protection Agency's maximum residue limit (250 μg/kg) at harvest...
January 11, 2019: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/30632907/the-false-positive-effect-of-residue-of-sulphur-sources-on-dithiocarbamate-analysis-based-on-cs-2-measurement
#13
Sinan Arslan, Ilkem Demirkesen Mert, Sema Yiğitkaya, Ozlem Dagaşan, Feridun Nihat Sakallı, Selma Oztürk
Turkey plays an important role in the international trade of apricots as it has the largest production rate in the world. Since the sulphurisation process is allowed to be used for different products, the effect of residual sulphur and its compounds (which can be found in products as pesticide residues or additive residues) on the positive detection of carbon disulphide (CS2 ) still creates a big challenge in international trade. Therefore, the main objective of the present study was to investigate the effects of residues of sulphur or sulphur compounds on dithiocarbamate analysis methods based on CS2 measurement...
January 11, 2019: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/30620682/detection-of-chloramphenicol-in-chicken-pork-and-fish-with-a-molecularly-imprinted-polymer-based-microtiter-chemiluminescence-method
#14
Bing-Jie Jia, Jun Huang, Ju-Xiang Liu, Jian-Ping Wang
In this study, 4-nitrotoluene (NT) was used as dummy template to synthesize a molecularly imprinted polymer that was highly specific for chloramphenicol. The polymer was coated in the wells of 96-well microplates as recognition reagent to develop a chemiluminescence method. The analyte solution and an enzyme-labelled hapten were added into the wells to perform competition, and the light signal was induced with a highly efficient luminol-H2 O2 -4-(imidazol-1-yl)phenol system. Then, the optimized method was used to determine chloramphenicol in meat (chicken, pork and fish), and the limit of detection (LOD) was 5...
January 8, 2019: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/30608892/bridging-legal-requirements-and-analytical-methods-a-review-of-monitoring-opportunities-of-animal-proteins-in-feed
#15
Leo W D van Raamsdonk, Theo W Prins, Nathan Meijer, Ingrid M J Scholtens, Monique G E G Bremer, Jacob de Jong
Availability and safety of food ranks among the basic requirements for human beings. The importance of the food producing sector, inclusive of feed manufacturing, demands a high level of regulation and control. This paper will present and discuss the relationships in the triangle of legislation, the background of hazards with a biological nature, and opportunities for monitoring methods, most notable for prion-based diseases as primary issue. The European Union legislation for prevention of prion-based diseases since 2000 is presented and discussed...
January 4, 2019: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/30605012/high-throughput-residue-analysis-of-paraquat-and-diquat-involving-hydrophilic-interaction-liquid-chromatographic-separation-and-mass-spectrometric-determination
#16
Dasharath Oulkar, Raviraj Shinde, Zareen Khan, Kaushik Banerjee
A selective, sensitive and robust LC-MS/MS method is reported for the determination of the residues of paraquat and diquat in various fruit matrices, including grape, apple and pomegranate. The extraction with acidified water (0.1 M HCl) at 80°C (15 min) offered superior recoveries for both analytes with a significantly lower matrix effects as compared to the extraction with acidified methanol by the methods reported in the existing literature. The optimised HPLC conditions on hydrophilic interaction liquid chromatography (HILIC) columns, when coupled with electrospray ionisation-tandem mass spectrometry, offered their limit of quantification at 0...
January 3, 2019: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/30601713/conclusions-from-a-swiss-official-control-of-the-safety-assessment-for-food-contact-polyolefins-through-the-compliance-documentation-of-the-producers
#17
Jürg Daniel, Karsten Hoetzer, Gregor McCombie, Koni Grob
Swiss control authorities checked the safety assessment of nine major producers of polyolefin granulates for making food contact materials. It was a pilot project to gain experience on the procedure of collecting and evaluating compliance documentation, but also to obtain insight into the quality of compliance work performed by the main plastic producers. It revealed that there are fundamental problems in performing such control. These are reported with proposals for improvement. For most products, the safety assessment made available did not correspond to the requirements, as confirmed by a group of internationally recognised experts, who were asked for their opinion on whether the safety of the migrates was assessed in accordance to 'internationally accepted scientific methods on risk assessment', as required by Art...
January 2, 2019: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/30601712/quantification-of-folpet-and-phthalimide-in-tea-and-herbal-infusions-by-lc-high-resolution-ms-and-gc-ms-ms
#18
José Fernando Huertas-Pérez, Marion Ernest, Flavia Badoud
Two methods based on a modified QuEChERS sample preparation and either LC coupled to atmospheric pressure ionisation and high-resolution MS or GC coupled to electron ionisation and tripled quadrupole MS have been assessed for the quantification of folpet and phthalimide in tea and other dry herbal infusions. Both methods have been fully validated in green tea and further checked in black tea, verbena and rooibos, and they performed according to the SANTE/11813/2017 criteria at the target LOQ concentration level (50 µg/kg)...
January 2, 2019: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/30543487/gas-chromatography-isotope-dilution-mass-spectrometry-method-validation-for-target-pesticides-in-soybeans
#19
J F Huertas-Pérez, B Sejerøe-Olsen, T Gokcen, F Sandor, H Schimmel, M Dabrio
The production of certified reference materials requires the application of highly accurate methods for characterisation. A gas chromatography-isotope dilution mass spectrometry method, setting ambitious performance criteria, was developed for eight selected pesticides in soybeans. Pressurised liquid extraction was followed by automated gel-permeation chromatography and solid-phase extraction clean-up. Pesticides identification respected a Commission Decision and guidelines of the Directorate General for Health and Food Safety (DG SANTE)...
December 13, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/30517832/chemical-and-toxicological-alterations-of-zearalenone-under-ozone-treatment
#20
Yun Xu, Yifan Wang, Jian Ji, Hao Wu, Fuwei Pi, Yinzhi Zhang, Xiulan Sun
Our work mainly studied the elimination of zearalenone (ZEN) from corn flour by ozone treatment. We found four degradation products, after separation and identification by UPLC-ESI-QTOF-MS, named as Compound 1 (m/z 335.18), Compound 2 (m/z 351.19), Compound 3 (m/z 321.19) and Compound 4 (m/z 367.18). Then, one main transformation pathway was predicted on the basis of molecular weight and the reaction mechanism of ozone. We had also detected two of the degradation products by our modified UPLC-MS/MS method in real samples-contaminated corn flour...
December 5, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
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