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https://www.readbyqxmd.com/read/27905857/recent-development-in-sample-preparation-and-analytical-techniques-for-determination-of-quinolone-residues-in-food-products
#1
Zhichao Zhang, Hefa Cheng
Used heavily in food animal production, quinolones occur widely in food products of animal origin. Development of highly sensitive and selective analytical techniques for the detection of quinolone residues, often at trace levels, in food samples is necessary to ensure food safety and understand their public health risk. With complex matrices, food samples typically require a series of pretreatment steps, such as powdering, homogenization, deproteinization, and filtration. This review summarizes the recent advances in extraction, concentration, and detection techniques for quinolones in food product samples, and briefly compares the advantages and limitations of major techniques...
December 1, 2016: Critical Reviews in Analytical Chemistry
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
#2
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/27891751/simultaneous-determination-of-pyrifluquinazon-and-its-main-metabolite-in-fruits-and-vegetables-by-using-quechers-hplc-ms-ms
#3
Xiangwei You, Chengcheng Sui, Yiqiang Li, Xiuguo Wang
A rapid, reliable and sensitive method is reported for the simultaneous analysis of pyrifluquinazon and its main metabolite NNI-0101-1H in fruits (strawberry and cherry) and vegetables (cucumber and tomato) using high-performance liquid chromatography coupled with tandem mass spectrometry. A modified quick, easy, cheap, effective, rugged and safe procedure was used for the sample pre-preparation. The target analytes were extracted with acetonitrile and then cleaned up using dispersive solid phase extraction procedure with primary secondary amine...
November 28, 2016: Journal of Separation Science
https://www.readbyqxmd.com/read/27886770/multiresidue-method-for-trace-pesticide-analysis-in-honeybee-wax-comb-by-gc-qqq-ms
#4
M D Gil García, S Uclés Duque, A B Lozano Fernández, A Sosa, A R Fernández-Alba
The aim of this analytical study is to develop an improved multi-residue methodology of high sensitivity and expanded scope for pesticide residue analysis in honeybee wax combs. The method was validated for 160 pesticide residues (including acaricides, insecticides, fungicides and herbicides) gas chromatography amenable and covering a wide variety of polarity and chemical structure. This method of analysis applied gas chromatography coupled to a triple quadrupole mass spectrometer for the quantitative analysis of pesticide residues...
January 15, 2017: Talanta
https://www.readbyqxmd.com/read/27886757/different-sample-treatments-for-the-determination-of-icm-xr-in-fish-samples-followed-by-lc-hrms
#5
Mireia Núñez, Francesc Borrull, Núria Fontanals, Eva Pocurull
Iodinated X-ray contrast media (ICM-XR) are a group of pharmaceuticals widely used in medicine. Due to their low biodegradation rate, which makes their removal at wastewater treatment plants difficult, and the high doses at which they are administered, they have been detected in aquatic environments. In the present paper, a method for the quantitative determination of a group of ICM-XR in different fish species was developed and validated for the first time. Two extraction techniques were compared: pressurised liquid extraction (PLE) and QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe), with PLE being selected, followed by liquid chromatography-high resolution mass spectrometry...
January 15, 2017: Talanta
https://www.readbyqxmd.com/read/27885791/simple-and-fast-analysis-of-tetrabromobisphenol-a-hexabromocyclododecane-isomers-and-polybrominated-diphenyl-ethers-in-serum-using-solid-phase-extraction-or-quechers-extraction-followed-by-tandem-mass-spectrometry-coupled-to-hplc-and-gc
#6
Jian Li, Tian Chen, Yuwei Wang, Zhixiong Shi, Xianqing Zhou, Zhiwei Sun, Dejun Wang, Yongning Wu
Two simplified sample preparation procedures for simultaneous extraction and clean-up of tetrabromobisphenol A, α-, β- and γ-hexabromocyclododecane and polybrominated diphenyl ethers in human serum were developed and validated. The first procedure was based on solid-phase extraction. Sample extraction, purification and lipid removal were carried out directly on an Oasis HLB cartridge. The second procedure was a quick, easy, cheap, effective, rugged and safe based approach using octadecyl-modified silica particles as a sorbent...
November 25, 2016: Journal of Separation Science
https://www.readbyqxmd.com/read/27878481/field-investigations-of-dissipations-and-residues-of-cyazofamid-in-soil-and-tomato-risk-assessment-of-human-exposure-to-cyazofamid-via-tomato-intake
#7
Zhenlan Xu, Changpeng Zhang, Jianzhong Yu, Chunrong Zhang, Min Wu, Hongmei He, Yahong Zhu, Fangyuan Lou, Yuanyuan Wu, Yanhua Wang, Liezhong Chen, Hua Zhao, Qiang Wang, Leiming Cai
Cyazofamid, as a fungicide of the novel cyanoimidazole chemical class, has been widely used to control tomato late blight. Understanding of cyazofamid residues in environment and crops is an essential prerequisite for its risk assessment. In this study, field investigations in four typical tomato-producing areas were conducted to explore the dissipation kinetics and residues of cyazofamid and its primary metabolite 4-chloro-5-p-tolylimidazole-2-carbonitrile (CCIM) in soil and tomato. A robust method using QuEChERS coupled with liquid chromatography-tandem mass spectrometry (LC-MS/MS) was developed for simultaneous analysis of cyazofamid and CCIM, with limits of quantification of 0...
November 22, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27863002/development-of-a-single-run-analytical-method-for-the-detection-of-ten-multi-class-emerging-contaminants-in-agricultural-soil-using-an-acetate-buffered-quechers-method-coupled-with-lc-ms-ms
#8
Young-Jun Lee, Jeong-Heui Choi, A M Abd El-Aty, Hyung Suk Chung, Han Sol Lee, Sung-Woo Kim, Md Musfiqur Rahman, Byung-Jun Park, Jang-Eok Kim, Ho-Chul Shin, Jae-Han Shim
This study was undertaken to develop and validate a single multiresidue method for the monitoring of ten multi-class emerging contaminants, viz. ceftiofur, clopidol, florfenicol, monensin, salinomycin, sulfamethazine, sulfathiazole, sulfamethoxazole, tiamulin, and tylosin in agricultural soil. Samples were extracted using acetate-buffered modified quick, easy, cheap, effective, rugged, and safe method followed by liquid chromatography with tandem mass spectrometric analysis in positive ion mode. Separation on an Eclipse Plus C18 column was conducted in gradient elution mode using a mobile phase of methanol (A) and distilled water (B), each containing 0...
November 10, 2016: Journal of Separation Science
https://www.readbyqxmd.com/read/27860351/evaluation-of-a-new-modified-quechers-method-for-the-monitoring-of-carbamate-residues-in-high-fat-cheeses-by-using-uhplc-ms-ms
#9
Ahmed M Hamed, David Moreno-González, Laura Gámiz-Gracia, Ana M García-Campaña
A simple and efficient method for the determination of 28 carbamates in high-fat cheeses is proposed. The methodology is based on a modified quick, easy, cheap, effective, rugged, and safe procedure as sample treatment using a new sorbent (Z-Sep(+) ) followed by ultra high performance liquid chromatography with tandem mass spectrometry determination. The method has been validated in different kinds of cheese (Gorgonzola, Roquefort and Camembert), achieving recoveries of 70-115%, relative standard deviations lower than 13% and limits of quantification lower than 5...
November 18, 2016: Journal of Separation Science
https://www.readbyqxmd.com/read/27854062/determination-of-pesticide-and-phthalate-residues-in-tea-by-quechers-method-and-their-fate-in-processing
#10
Sapna Yadav, Satyajeet Rai, Ashutosh K Srivastava, Smita Panchal, D K Patel, V P Sharma, Sudha Jain, L P Srivastava
In this study, the quick, easy, cheap, effective, rugged, and safe (QuEChERS) method was applied for the analysis of the multiclass pesticide residues of 12 organochlorines (OCs), 9 organophosphates (OPs), 11 synthetic pyrethroids (SPs), 4 herbicides, 6 phthalates in raw tea (loose tea, branded tea and herbal tea), and tea infusion in 4 different containers (glass cup, earthen cup, plastic bag and disposal cup). In loose tea and branded tea residues, malathion (0.257 and 0.118 mg kg(-1)), cypermethrin (0...
November 17, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27805312/selective-solid-phase-extraction-using-a-molecularly-imprinted-polymer-for-the-analysis-of-patulin-in-apple-based-foods
#11
Paolo Lucci, Sabrina Moret, Sara Bettin, Lanfranco Conte
The aim of this work was to evaluate the use of a molecularly imprinted polymer as selective solid-phase extraction sorbent for the clean-up and pre-concentration of patulin from apple-based food products. Ultra high pressure liquid chromatography coupled to ultraviolet absorbance detection was used for the analysis of patulin. The molecularly imprinted polymer was applied, for the first time, to the determination of patulin in apple juice, puree and jam samples spiked within the maximum levels specified by the European Commission No...
November 2, 2016: Journal of Separation Science
https://www.readbyqxmd.com/read/27796456/development-of-quechers-based-extraction-and-liquid-chromatography-tandem-mass-spectrometry-method-for-simultaneous-quantification-of-bisphenol-a-and-tetrabromobisphenol-a-in-seafood-fish-bivalves-and-seaweeds
#12
Sara C Cunha, Cátia Oliveira, José O Fernandes
A liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the simultaneous determination of bisphenol A (BPA) and tetrabromobisphenol A (TBBPA) in different seafood samples was developed and validated. Sample preparation was based on a quick, easy, cheap, effective, rugged, and safe (QuEChERS)-based procedure through an extraction of target analytes with acidified acetonitrile (MeCN) added with inorganic salts (MgSO4, NaCl) followed by a liquid-liquid extraction (LLE) using hexane-tertbutylmethyl ether/hexane-benzene to eliminate matrix co-extracts...
October 29, 2016: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/27786469/effective-monitoring-of-fluxapyroxad-and-its-three-biologically-active-metabolites-in-vegetables-fruits-and-cereals-by-optimized-quechers-treatment-based-on-uplc-ms-ms
#13
Xixi Chen, Fengshou Dong, Jun Xu, Xingang Liu, Xiaohu Wu, Yongquan Zheng
Qualitative analysis and quantification of pesticide residue in foodstuff are essential to our health in daily life, especially aimed at their metabolites, which may be more toxic and persistent. Thus, a valid analytical measure for detection of fluxapyroxad and its three metabolites (M700F002 (C-2), M700F008 (C-8), M700F048 (C-48)) in vegetables (cucumber, tomato, and pepper), fruits (grape, apple), (and cereals (wheat, rice) was developed by UPLC-MS/MS with negative ion mode. Among, targets compounds were extracted by acetonitrile contain 0...
October 27, 2016: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/27776329/amphetamine-and-derivatives-in-natural-weight-loss-pills-and-dietary-supplements-by-capillary-electrophoresis-tandem-mass-spectrometry
#14
Vagner Bezerra Dos Santos, Daniela Daniel, Melina Singh, Claudimir Lucio do Lago
A capillary electrophoresis-tandem mass spectrometry (CE-MS/MS) method for amphetamine (AM), phentermine (PTM), methamphetamine (MAM), methylenedioxyamphetamine (MDA), methylenedioxymethamphetamine (MDMA), and methylenedioxyethylamphetamine (MDEA) in commercial samples of homeopathic and phytotherapic medicines and dietary supplements is presented. The samples were submitted to a modified QuEChERS extraction procedure (at apparent pH 13) followed by electrophoretic separation in 0.1molL(-1) formic acid electrolyte (pH 2...
October 17, 2016: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/27773388/enantiomeric-determination-and-evaluation-of-the-racemization-process-of-atropine-in-solanaceae-seeds-and-contaminated-samples-by-high-performance-liquid-chromatography-tandem-mass-spectrometry
#15
Jesús Marín-Sáez, Roberto Romero-González, Antonia Garrido Frenich
A new method has been developed for the enantioselective separation of (-) and (+) hyoscyamine in Solanaceaes seeds and contaminated buckwheat. Chromatographic separation was optimized, evaluating two chiral columns, Chirobiotic V and Chiralpal-AY3. Better resolution was obtained using a Chiralpak-AY3 column, utilizing as mobile phase ethanol (0.1% diethanolamine). An extraction procedure based on a modified QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) was applied, using water and acetonitrile containing 1% of acetic acid, and a clean-up step utilizing primary secondary amine (PSA) and graphitized carbon black (GCB) as sorbents...
October 19, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/27769534/rapid-screening-and-quantification-of-residual-pesticides-and-illegal-adulterants-in-red-wine-by-direct-analysis-in-real-time-mass-spectrometry
#16
Tianyang Guo, Pingping Fang, Juanjuan Jiang, Feng Zhang, Wei Yong, Jiahui Liu, Yiyang Dong
A rapid method to screen and quantify multi-class analytic targets in red wine has been developed by direct analysis in real time (DART) coupled with triple quadruple tandem mass spectrometry (QqQ-MS). A modified QuEChERS (Quick, Easy, Cheap, Effective, Rugged, and Safe) procedure was used for increasing analytical speed and reducing matrix effect, and the multiple reaction monitoring (MRM) in DART-MS/MS ensured accurate analysis. One bottle of wine containing 50 pesticides and 12 adulterants, i.e., preservatives, antioxidant, sweeteners, and azo dyes, could be totally determined less than 12min...
October 1, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/27765084/multiresidue-analysis-of-five-neonicotinoid-insecticides-and-their-primary-metabolite-in-cucumbers-and-soil-using-high-performance-liquid-chromatography-with-diode-array-detection
#17
Lobna A Hussein, Noha F El Azab, Maha F Abdel-Ghany
A sensitive, selective, and validated HPLC-diode-array detection method was developed for the simultaneous determination of five neonicotinoid insecticides-acetamiprid, imidacloprid, nitenpyram, flonicamid, and thiacloprid-and their primary metabolite, 6-chloronicotinic acid, in cucumbers and soil based on the quick, easy, cheap, effective, rugged, and safe (QuEChERS) technique as a pretreatment procedure. In the QuEChERS procedure, cucumber samples were extracted with acetonitrile and cleaned using C18, whereas soil samples were extracted with an acetonitrile-dichloromethane mixture (1 + 2)...
October 19, 2016: Journal of AOAC International
https://www.readbyqxmd.com/read/27760024/development-and-validation-of-an-analytical-method-for-determination-of-ergot-alkaloids-in-animal-feedingstuffs-with-high-performance-liquid-chromatography-fluorescence-detection
#18
E Kowalczyk, E Patyra, A Grelik, K Kwiatek
A high performance liquid chromatography combined with fluorescence detection (HPLC-FLD) method was developed for determination of five ergot alkaloids (EA): ergometrine, ergotamine, ergocornine, ergocrypine and ergocristine in animal feedingstuffs. The method was based on the application of QuEChERS salts for extraction and modified QuEChERS dispersive SPE for the cleanup step. Alkaloids separation was performed on a C18, 250 mm x 4.6 mm, 5 μm column with the mobile phase containing ammonium carbonate and acetonitrile...
September 1, 2016: Polish Journal of Veterinary Sciences
https://www.readbyqxmd.com/read/27744690/development-of-a-quechers-based-stable-isotope-dilution-lc-ms-ms-method-to-quantitate-ferulic-acid-and-its-main-microbial-and-hepatic-metabolites-in-milk
#19
Martin Waterstraat, Andreas A Hildebrand, Margit Rosler, Mirko Bunzel
Forage plants of the Poaceae family are grown as pasturage or used for the production of hay, straw, corn stover, etc. Although ferulic acid contents of grasses are generally high, the amount of ingested ferulic acid differs depending on the type of forage resulting in varying contents of ferulic acid and its microbial and hepatic metabolites in milk. Concentrations and patterns of these metabolites may be used as markers to track different forages in livestock feeding. Therefore, we developed a stable isotope dilution assay to quantitate ferulic acid, twelve ferulic acid based metabolites, p coumaric acid, and cinnamic acid in milk...
October 15, 2016: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/27743038/determination-of-synthetic-musks-in-surface-sediment-from-the-bizerte-lagoon-by-quechers-extraction-followed-by-gc-ms
#20
Mouna Necibi, Laurent Lanceleur, Nadia Mzoughi, Mathilde Monperrus
A new analytical method for the simultaneous determination of eight synthetic musks compounds (SMs) including five polycyclic musks (PCMs) and three nitro musks (NMs) was validated for sediment samples based on a simple QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) sample preparation procedure followed by gas chromatography-mass spectrometry (GC-MS). Good analytical performances were obtained for all the target compounds. For the validation of the method, internal calibration (IC) and internal calibration with QuEChERS (ICQ) were compared...
October 14, 2016: Bulletin of Environmental Contamination and Toxicology
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