Food testing and agriculture Multiresidue determination of 375 organic contaminants including pesticides, polychlorinated biphenyls and polyaromatic hydrocarbons in fruits and vegetables by gas chromatography–triple quadrupole mass spectrometry with introduction of semi-quantification approach

An Agilent Bond Elut QuEChERS kit and ZORBAX Eclipse Plus C18 column were used to extract and analyze hormones and endocrine disruptors. Published by Springer. Multi-residue analysis of emerging pollutants in sediment using QuEChERS-based extraction followed by LC-MS/MS analysis Analytical and Bioanalytical Chemistry, 406, 1259–1266 (2014) Alexandra Berlioz-Barbier et al. Tags Bond Elut QuEChERS, environmental, emerging contaminants, soils, sludges and sediments Abstract Agilent Bond Elut QuEChERS AOAC and EN salts were used to extract emerging pollutants from sediments. Published by Springer.Agilent Bond Elut QuEChERS AOAC and EN salts were used to extract emerging pollutants from sediments. Published by Springer. Food testing and agriculture Multiresidue determination of 375 organic contaminants including pesticides, polychlorinated biphenyls and polyaromatic hydrocarbons in fruits and vegetables by gas chromatography–triple quadrupole mass spectrometry with introduction of semi-quantification approach Journal of Chromatography A, 1270, 283-295 (2012) Kaushik Banerjee et al. Tags Bond Elut QuEChERS extraction kit, HP-5ms, 7890A GC, 7000B Triple Quadrupole GC/MS, food testing and agriculture, pesticides Abstract Agilent Bond Elut QuEChERS sample preparation combined with Agilent GC (7890A) and MS (7000B Triple Quadrupole), with Agilent J&W; HP-5ms analytical columns and PTV were used for the analysis of 375 pesticide residues in a variety of produce samples. Published by Elsevier B. V.Agilent Bond Elut QuEChERS sample preparation combined with Agilent GC (7890A) and MS (7000B Triple Quadrupole), with Agilent J&W; HP-5ms analytical columns and PTV were used for the analysis of 375 pesticide residues in a variety of produce samples. Published by Elsevier B. V. Doxycycline and sulfadimethoxine transfer from cross-contaminated feed to chicken tissues Food Additives & Contaminants, 28, 860-868 (2011) G. Segato et al. Tags SampliQ EN, Bond Elut QuEChERS extraction kit, food testing and agriculture, veterinary drugs Abstract During feed preparation at feed mills or during feed mixing in bins at farms, the accidental contamination of feed at trace levels by veterinary drug residues, commonly known as carry-over, can accidentally but frequently occur. To evaluate the concentrations of residual antimicrobials in poultry edible tissues, due to contaminated feed, sulfadimethoxine and doxycycline were administered for 10 days to chickens in poultry feed incurred at the contamination levels frequently found during national feed monitoring programmes (1–5 mg kg−1). Sulfadimethoxine and doxycycline residual concentrations detected in muscle ( 0.99) across a concentration range of 0.2–400 ng/mL for the majority of the 236 pesticides evaluated in the three botanical matrices. Mean recoveries (average %RSD, n = 4) were 91 (6), 93 (4), 96 (3), and 99 (3)% for ginseng, 101 (9), 98 (6), 99 (4), and 102 (3)% for gingko biloba, and 100 (9), 98 (6), 96 (4), and 96 (3)% for saw palmetto at fortification concentrations of 25, 100, 250, and 500 μg/kg, respectively. The geometric mean matrix-dependent instrument detection limits were 0.17, 0.09, and 0.14 μg/kg on the basis of the studies of 236 pesticides tested in ginseng roots, gingko biloba leaves, and saw palmetto berries, respectively. The method was used to analyze incurred ginseng samples that contained thermally labile pesticides with a concentration range of 2–200 μg/kg, indicating different classes of pesticides are being applied to these botanicals other than the traditional pesticides that are commonly used and analyzed by gas chromatography techniques. The method demonstrates the use of an automated cleanup procedure and the LC-MS/MS detection of multiple pesticide residues in dried, powdered botanical dietary supplements. Reprinted with permission from the Journal of Agricultural and Food Chemistry. ©2012 American Chemical Society.An automated dispersive solid phase extraction (dSPE) cleanup procedure as part of the Quick, Easy, Cheap, Effective, Rugged, and Safe (QuEChERS) method, coupled with liquid chromatography–tandem mass spectrometry using electrospray ionization in positive mode, was used for the simultaneous analysis of 236 pesticides in three dried powdered botanical dietary supplements (ginseng, saw palmetto, and gingko biloba). The procedure involved extraction of the dried powdered botanical samples with salt-out acetonitrile/water extraction using anhydrous magnesium sulfate and sodium chloride, followed by an automated dSPE cleanup using a mixture of octadodecyl(C18) and primary–secondary amine (PSA)-linked silica sorbents and anhydrous MgSO4 and online LC-MS/MS analysis. Dynamic multiple-reaction monitoring (DMRM) based on the collection of two precursor-to-product ion transitions with their retention time windows was used for all of the targeted pesticides and the internal standard. Matrix-matched calibration standards were used for quantitation, and standard calibration curves showed linearity (r2 > 0.99) across a concentration range of 0.2–400 ng/mL for the majority of the 236 pesticides evaluated in the three botanical matrices. Mean recoveries (average %RSD, n = 4) were 91 (6), 93 (4), 96 (3), and 99 (3)% for ginseng, 101 (9), 98 (6), 99 (4), and 102 (3)% for gingko biloba, and 100 (9), 98 (6), 96 (4), and 96 (3)% for saw palmetto at fortification concentrations of 25, 100, 250, and 500 μg/kg, respectively. The geometric mean matrix-dependent instrument detection limits were 0.17, 0.09, and 0.14 μg/kg on the basis of the studies of 236 pesticides tested in ginseng roots, gingko biloba leaves, and saw palmetto berries, respectively. The method was used to analyze incurred ginseng samples that contained thermally labile pesticides with a concentration range of 2–200 μg/kg, indicating different classes of pesticides are being applied to these botanicals other than the traditional pesticides that are commonly used and analyzed by gas chromatography techniques. The method demonstrates the use of an automated cleanup procedure and the LC-MS/MS detection of multiple pesticide residues in dried, powdered botanical dietary supplements. Reprinted with permission from the Journal of Agricultural and Food Chemistry. ©2012 American Chemical Society. Alternative sample treatments for the determination of sulfonamides in milk by HPLC with fluorescence detection Food Chemistry, 143, 459-464 (2014) Natalia Arroyo-Manzanares, Laura GámizGracia, Ana M. García-Campaña Tags Bond Elut QuEChERS, SampliQ, food testing and agriculture, veterinary drugs Abstract Agilent Bond Elut QuEChERS salts and d-SPE were compared to dispersive liquid–liquid microextraction. Both gave good recovery and RSD. However, Bond Elut QuEChERS was easier to use and yielded an extract amenable to LC with fluorescence detection. Published by Elsevier B. V.Agilent Bond Elut QuEChERS salts and d-SPE were compared to dispersive liquid–liquid microextraction. Both gave good recovery and RSD. However, Bond Elut QuEChERS was easier to use and yielded an extract amenable to LC with fluorescence detection. Published by Elsevier B. V. A novel method for determination of patulin in apple juices by GC–MS Food Chemistry, 141, 1619-1623 (2013) Niloofar Kharandi. Mehran Babri, Jila Azad Tags Bond Elut QuEChERS, HP-5ms, 6890/5973N GC/MS, food testing and agriculture, mycotoxins and biotoxins Abstract Agilent Bond Elut PSA in bulk was used to extract patulin from apples. Analysis was then accomplished with an Agilent J&W; HP-5ms GC column fitted to an Agilent 6890 GC with detection provided by an Agilent 5973N mass selective detector. Published by Elsevier B. V.Agilent Bond Elut PSA in bulk was used to extract patulin from apples. Analysis was then accomplished with an Agilent J&W; HP-5ms GC column fitted to an Agilent 6890 GC with detection provided by an Agilent 5973N mass selective detector. Published by Elsevier B. V. Multiclass mycotoxin analysis in Silybum marianum by ultra high performance liquid chromatography–tandem mass spectrometry using a procedure based on QuEChERS and dispersive liquid-liquid microextraction Journal of Chromatography A, 1282, 11-19 (2013) Natalia Arroyo-Manzanares, Ana M. GarcíaCampaña, Laura Gámiz-Gracia, Tags Bond Elut QuEChERS, ZORBAX Eclipse Plus, food testing and agriculture, mycotoxins and biotoxins, dietary supplements, natural compounds and additives Abstract A method was developed using Agilent Bond Elut QuEChERS salts and d-SPE EN to extract mycotoxins from milk thistle. An Agilent ZORBAX Eclipse Plus LC provided the analysis. Published by Elsevier B. V.A method was developed using Agilent Bond Elut QuEChERS salts and d-SPE EN to extract mycotoxins from milk thistle. An Agilent ZORBAX Eclipse Plus LC provided the analysis. Published by Elsevier B. V. Determination of thyreostats in muscle and thyroid tissues by QuEChERS extraction and ultraperformance liquid chromatography tandem mass spectrometry Food Additives & Contaminants: Part A, 30, 949957 (2012) Francesca Lega et al. Tags Bond Elut QuEChERS, food testing and agriculture, veterinary drugs Abstract The use of thyreostats as veterinary drugs is banned in the European Union since 1981 because of their carcinogenic and teratogenic properties. Controlling their illegal use in breeding animals is quite difficult because of their low molecular weight, high polarity and the presence of tautomeric forms. To harmonise the performance of analytical methods, the recommended concentration for thyreostats such as thiouracil, methylthiouracil, propylthiouracil and tapazole established by the Community Reference Laboratory in 2007 is 10 ng g−1. The majority of the currently available analytical methods require a time-consuming derivatisation step and/or an SPE clean-up step. In this study, a rapid confirmatory method for the determination of six thyreostatic drugs – thiouracil, methylthiouracil, propylthiouracil, phenylthiouracil, tapazole and 2-mercaptobenzoimidazole – in thyroid and muscle at recommended concentration is presented. Quick sample extraction has been achieved by QuEChERS with ethyl acetate without further clean-up or derivatisation steps. Analysis has been carried out by using UPLC-ESI-MS/MS. Performance characteristics of the method have been determined in agreement with Commission Decision 2002/657/EC requirements for confirmatory methods and calculated decision limits (CCα) are below the recommended concentration (10 ng g−1). ©2012 Taylor & Francis.The use of thyreostats as veterinary drugs is banned in the European Union since 1981 because of their carcinogenic and teratogenic properties. Controlling their illegal use in breeding animals is quite difficult because of their low molecular weight, high polarity and the presence of tautomeric forms. To harmonise the performance of analytical methods, the recommended concentration for thyreostats such as thiouracil, methylthiouracil, propylthiouracil and tapazole established by the Community Reference Laboratory in 2007 is 10 ng g−1. The majority of the currently available analytical methods require a time-consuming derivatisation step and/or an SPE clean-up step. In this study, a rapid confirmatory method for the determination of six thyreostatic drugs – thiouracil, methylthiouracil, propylthiouracil, phenylthiouracil, tapazole and 2-mercaptobenzoimidazole – in thyroid and muscle at recommended concentration is presented. Quick sample extraction has been achieved by QuEChERS with ethyl acetate without further clean-up or derivatisation steps. Analysis has been carried out by using UPLC-ESI-MS/MS. Performance characteristics of the method have been determined in agreement with Commission Decision 2002/657/EC requirements for confirmatory methods and calculated decision limits (CCα) are below the recommended concentration (10 ng g−1). ©2012 Taylor & Francis. Determination of Some Chemical Contaminants Might Exist in Some Raw Food Materials Used in Some Egyptian Hotels World Journal of Dairy & Food Sciences, 8, 175180 (2013) M.A. Abd Al-Fattah, M. Emam, Z. Ashour Tags Bond Elut QuEChERS, DB-35ms UI, 7890/5975C GC/MS, 7683B Autosampler, food testing and agriculture, pesticides Abstract In an investigation of possible food contaminants in Egyptian catering establishments, Agilent Bond Elut QuEChERS was used for sample prep, followed by separation on an Agilent J&W; DB-35ms Ultra Inert GC column fitted to an Agilent GC/MS system. Published by IDOSI Publications.In an investigation of possible food contaminants in Egyptian catering establishments, Agilent Bond Elut QuEChERS was used for sample prep, followed by separation on an Agilent J&W; DB-35ms Ultra Inert GC column fitted to an Agilent GC/MS system. Published by IDOSI Publications. www.agilent.com/chem Agilent shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material. Information, descriptions, and specifications in this publication are subject to change without notice. © Agilent Technologies, Inc., 2014