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Showing 1-30 of 93 results for "55174-U" within Papers
Guo-Fang Pang et al.
Journal of AOAC International, 96(4), 887-896 (2013-09-05)
A comparative study was conducted over three stages on the cleanup efficiency of SPE cartridge Cleanert TPT, newly developed for multigroups of pesticide residues in tea. In Stage I, different SPE cartridges C18, graphite carbon black (GCB), primary secondary amine
Zhaoyun Cao et al.
Se pu = Chinese journal of chromatography, 32(12), 1390-1399 (2015-04-24)
An analytical method was developed for the simultaneous determination of 32 pesticides including organophosphorus, organochlorine, pyrethroid and carbamate pesticides in fruits and vegetables using gas chromatography-mass spectrometry (GC-MS). The sample was extracted with acetonitrile, and the organic layer was cleaned
Yong Yu et al.
Talanta, 89, 258-263 (2012-01-31)
Endocrine disrupting compounds (EDCs) and pharmaceuticals and personal care products (PPCPs) have been acknowledged as emerging pollutants due to widespread contamination in environment. A rapid and reliable analytical method, based on ultrasonic extraction, clean up on Envi-carb cartridge, derivatized with
Sachiyo Ibuki et al.
Shokuhin eiseigaku zasshi. Journal of the Food Hygienic Society of Japan, 48(5), 139-143 (2007-11-22)
A method for simultaneous determination of Dichlorvos (DDVP), Trichlorfon (DEP) and Naled (BRP) in fruits and vegetables by liquid chromatography with tandem mass spectrometry (LC/MS/MS) was developed. Pesticides were extracted with ethyl acetate together with phosphoric acid and anhydrous sodium
J García-Lavandeira et al.
Analytical and bioanalytical chemistry, 397(2), 751-763 (2010-03-10)
A highly sensitive procedure for the efficient routine control of aromatic amines derived from banned azo dyes in textile and leather products was developed and optimized. The procedure involves the extraction and reduction of azo dyes from solid samples following
Pingzhong Yu et al.
Journal of the science of food and agriculture, 97(10), 3294-3299 (2016-12-16)
The residue concentrations and dissipation rate of a new oxathiapiprolin fungicide in grapes and soil were investigated to provide an evaluation for the safe use of oxathiapiprolin in grapes. Pesticide residue was extracted by acetonitrile, then purified by solid-phase extraction
Maki Kobayashi et al.
Shokuhin eiseigaku zasshi. Journal of the Food Hygienic Society of Japan, 43(3), 133-143 (2002-09-20)
We investigated the determination of N-methylcarbamate pesticides and their metabolites in agricultural products by HPLC with post-column fluorescence detection after clean-up with an SPE cartridge. The homogenate of agricultural products was extracted with acetone. The crude extract was partitioned between
Yoshihisa Kakimoto et al.
Shokuhin eiseigaku zasshi. Journal of the Food Hygienic Society of Japan, 44(5), 253-262 (2004-01-22)
A method was developed for simultaneous determination of pesticide residues in fruits and vegetables. Residues were extracted from samples with acetonitrile, followed by a salting-out step and a partitioning step with n-hexane at the same time. Co-extractives were removed with
Hongna Zhang et al.
Journal of chromatography. A, 1404, 72-80 (2015-06-14)
Degradation of fluorotelomer alcohols (FTOHs) was recognized as an additional source of perfluorocarboxylic acids (PFCAs). Quantification of FTOHs and their degradation products can help shed light on the sources and fates of PFCAs in the environment. In this study, an
K Martínez et al.
Journal of chromatography. A, 879(1), 27-37 (2000-06-28)
A new method for the simultaneous determination of antifouling pesticides and some of their byproducts such as dichlofluanid, diuron and its byproducts [demethyldiuron and 1-(3,4-dichlorophenyl)urea], (2-thiocyanomethylthio)ben: zothiazole, chlorothalonil, Sea-nine 211, Irgarol 1051 and one of its byproducts (2-methylthio-4-tert.-butylamino-s-triazine) in seawater
Jing Ha et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 1017-1018, 187-194 (2016-03-19)
A new method using solid phase extraction (SPE) combined with liquid chromatography-tandem mass spectrometry (LC-MS/MS) has been developed for the determination of six polyether antibiotics, including lasalocid, salinomycin, monensin, narasin, madubamycin and nigericin residues, in foods of animal origin. The
X Yang et al.
Food chemistry, 127(2), 855-865 (2011-07-15)
A method using solid phase extraction (SPE) cleanup followed by gas chromatography-mass spectrometry (GC-MS) has been established for quantitative determination of 88 pesticide residues in berry fruits including raspberry, strawberry, blueberry and grape. Based on an appraisal of the characteristics
Runzeng Liu et al.
Talanta, 111, 170-177 (2013-04-30)
A new method using ultrasonic extraction and solid phase extraction (SPE) clean-up pretreatments was developed for the analysis of mono-, di- and tri-substituted polyfluoroalkyl phosphates (abbreviated as mono-PAPs, di-PAPs and tri-PAPs) and perfluorinated phosphonic acids (PFPAs) in sludge from wastewater
L Mijangos et al.
Journal of chromatography. A, 1389, 8-18 (2015-03-10)
The present study is focused on the development of an analytical method based on focused ultrasonic solid-liquid extraction (FUSLE) followed by dispersive solid-phase extraction (dSPE) clean-up and liquid chromatography-triple quadrupole tandem mass spectrometry (LC-MS/MS) optimised for the simultaneous analysis of
Itsaso Zabaleta et al.
Food chemistry, 230, 497-506 (2017-04-15)
Liquid chromatography coupled to quadrupole time-of-flight mass spectrometry (LC-QToF-MS) was used for the accurate identification (<10ppm) of different polyfluoroalkylphosphates (PAPs) and their intermediate and end degradation products in popcorn bags. Up to 46 per- and polyfluoroalkyl substances (PFASs) and precursors
D Martínez et al.
Journal of chromatography. A, 827(1), 105-112 (1999-01-23)
This study compares four different commercial sorbents, LC-SAX (a quaternary ammonium anion exchanger), LiChrolut EN (a highly crosslinked styrene-divinylbenzene), Envi-Carb (a graphitized carbon black) and Oasis HLB [a macroporous poly(divinylbenzene-co-N-vinylpyrrolidone) copolymer], for the solid-phase extraction (SPE) of various haloacetic compounds
Ondrej Lacina et al.
Journal of chromatography. A, 1218(28), 4312-4321 (2011-05-31)
The present study documents development and validation of a novel approach for determination of 23 perfluorinated alkylated substances (PFASs) in food of animal origin represented by milk and fish. The list of target analytes comprises four classes of PFASs, both
Ana Ballesteros-Gómez et al.
Journal of chromatography. A, 1217(38), 5913-5921 (2010-08-17)
A new solvent extraction system was developed for extraction of PFCs from food. The extraction is carried out with 75:25 (v/v) tetrahydrofuran:water, a solvent mixture that provides an appropriate balance of hydrogen bonding, dispersion and dipole-dipole interactions to efficiently extract
Yuchen Pan et al.
Se pu = Chinese journal of chromatography, 30(11), 1159-1165 (2013-03-05)
A gas chromatography-tandem mass spectrometry (GC-MS/MS) method with subcritical water extraction was developed for the determination of 21 organochlorine and pyrethroid pesticides in black tea. Under the extraction pressure of 5 MPa, the target compounds were extracted with subcritical water
Andrew Seen et al.
Chemosphere, 103, 306-312 (2014-02-04)
The graphitised carbon solid phase extraction (SPE) sorbent Envi-Carb has been used to fabricate glass fibre filter- Envi-Carb "sandwich" disks for use as a passive sampler for acid herbicides. Passive sampler uptake of a suite of herbicides, including the phenoxyacetic
U Führer et al.
Analytical and bioanalytical chemistry, 354(3), 333-343 (1996-01-01)
Halogenated anisoles (methyl-phenyl ethers) appear to be ubiquitous organic trace compounds in the environment. An analytical method is presented for analyzing the altogether 134 congeners of chloro-, bromo- and mixed bromochloro-anisoles on an isomer-specific basis in air. High volume sampling
Olalla López-Fernández et al.
Analytical and bioanalytical chemistry, 407(23), 7101-7110 (2015-07-29)
The aim of this work is the development of a simple, fast, quantitative, and economic method for the determination of neonicotinoid insecticide residues in dietary bee pollen. Several parameters of the method, such as extraction solvent, extraction time, and solid-phase
Zhengyun Lou et al.
Se pu = Chinese journal of chromatography, 26(5), 568-576 (2009-01-24)
A multiresidue analytical method was developed for the determination of ninety-two pesticides in tea using solid-phase extraction (SPE) and gas chromatographic determination. Tea samples were extracted with acetonitrile, organophosphorus pesticides were clean-up by an Envi-Carb SPE cartridge, eluted with 10
Mercedes Barriada-Pereira et al.
Journal of AOAC International, 93(3), 992-998 (2010-07-16)
A method based on matrix solid-phase dispersion (MSPD) and SPE to determine 20 organochlorine pesticides (OCPs) in fish tissues (muscle and liver) was optimized in terms of the sorbents and elution solvents used for the analysis. The following analytical components
Jerzy Falandysz et al.
Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering, 47(3), 428-434 (2012-02-11)
Perfluorinated alkylated substances (PFAS) have been determined in surface sediments and sediment core from Gulf of Gdańsk, Baltic Sea. Perfluorooctanesulphonate (PFOS), perfluorohexanesulphonate (PFHxS), perfluorodecanoate (PFDA), perfluoronanoate (PFNA), perfluorooctanoate (PFOA), perfluoroheptanoate (PFHpA), perfluoroundecanote (PFUnDA), perfluorododecanoate (PFDoDA) and perfluorohexanoate (PFHxA) were quantified
J Slobodník et al.
Journal of chromatography. A, 750(1-2), 227-238 (1996-10-25)
The suitability of Empore-activated carbon disks (EACD), Envi-Carb graphitized carbon black (GCB) and CPP-50 graphitized carbon for the trace enrichment of polar pesticides from water samples was studied by means of off-line and on-line solid-phase extraction (SPE). In the off-line
Ronald E Hunter et al.
Journal of agricultural and food chemistry, 58(3), 1396-1402 (2010-01-16)
We have developed a rapid, high-throughput, accurate, multiresidue method for the analysis of selected organophosphorus and pyrethroid pesticides in a variety of food samples suitable for use in public health and epidemiologic investigations of high-use pesticides using modifications of existing
Bing Shao et al.
Journal of AOAC International, 92(2), 604-611 (2009-06-03)
A sensitive analytical method has been developed and validated for simultaneous determination of 16 glucocorticoid (fluorometholone, flumethasone, triamcinolone, aldosterone, clobetasol propionate, methylprednisolone, fluocinolone acetonide, hydrocortisone, prednisone, dexamethasone, beclomethasone, prednisolone, budesonide, triamcinolone acetonide, fludrocortisone acetate, and cortisone) residues in pig tissues
Li Li et al.
Se pu = Chinese journal of chromatography, 28(3), 301-304 (2010-06-17)
A high performance liquid chromatography-tandem mass spectrometry method (HPLC-MS/MS) was developed for the analysis of amitrole residues in agricultural products. The samples were extracted by 25% acetone for wheat, fish, pork and liver samples, 1% acetic acid-25% acetone for maize
Xia Li et al.
Journal of separation science, 38(11), 1998-2005 (2015-04-03)
A highly sensitive method based on solid-phase extraction and ultra high performance liquid chromatography with electrospray tandem mass spectrometry has been developed for simultaneous determination of five iodinated X-ray contrast media in environmental water samples. Various solid-phase extraction cartridges have
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