Protein Information

Name C18
Synonyms B1; D1; BBS 9; BBS9; BBS9 GENE; Bardet Biedl syndrome 9 protein; C18; PTH responsive osteosarcoma B1 protein…

Compound Information

Name chlorpyrifos
CAS

Reference List

PubMed Abstract RScore(About this table)
16915825 Cobb JM, Mattice JD, Senseman SA, Dumas JA, Mersie W, Riley MB, Potter TL, Mueller TC, Watson EB: Stability of pesticides on solid-phase extraction disks after incubation at various temperatures and for various time intervals: interlaboratory study. J AOAC Int. 2006 Jul-Aug;89(4):903-12.

Deionized water fortified with selected pesticides was extracted by using 2 types of SPE filtration disks (Empore C18 and Speedisk C18XF), and after extraction, the disks were incubated at 3 temperatures (25, 40, and 55 degrees C) and for 2 time intervals (4 and 14 days).
Deionized water was fortified with atrazine, carbofuran, and chlorpyrifos by all participating laboratories.
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9299730 Torres CM, Pico Y, Manes J: Comparison of octadecylsilica and graphitized carbon black as materials for solid-phase extraction of fungicide and insecticide residues from fruit and vegetables. J Chromatogr A. 1997 Aug 22;778(1-2):127-37.

Methods for the determination of thirteen fungicide and insecticide residues by solid-phase extraction with C18 and graphitized carbon black (GCB) were evaluated.
The recoveries were determined by fortifying six different crops (apples, oranges, pears, tomatoes, lettuces and paprikas) with the pesticides studied (bromopropylate, chlorpyrifos methyl, cypermethryn, deltamethryn, fenarimol, fenvalerate, imazalil, lindane, permethryn, phentoate, procymidone, propiconazole and vinclozoline).
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11339298 Abu-Qare AW, Abou-Donia MB: Development of a high-performance liquid chromatographic method for the quantification of chlorpyrifos, pyridostigmine bromide, N,N-diethyl-m-toluamide and their metabolites in rat plasma and urine. J Chromatogr B Biomed Sci Appl. 2001 Apr 25;754(2):533-8.

The method is based on using solid-phase extraction and high-performance liquid chromatography (HPLC) with reversed-phase C18 column, and gradient UV detection ranging between 210 and 280 nm.
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10931542 Sancho JV, Pozo OJ, Hernandez F: Direct determination of chlorpyrifos and its main metabolite 3,5, 6-trichloro-2-pyridinol in human serum and urine by coupled-column liquid chromatography/electrospray-tandem mass spectrometry. Rapid Commun Mass Spectrom. 2000;14(16):1485-90.

A 10 microL aliquot was then analyzed using as first separation column a Discovery C18 5 microm 50 x 2.1 mm; the fraction containing the analyte was transferred on-line to the second column consisting of a ABZ+ 5 microm 100 x 2.1 mm, which was connected to the electrospray source (Z-spray) of a Quattro LC triple-quadrupole instrument.
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12967120 LeBlanc CJ, Stallard WM, Green PG, Schroeder ED: Passive sampling screening method using thin-layer chromatography plates. Environ Sci Technol. 2003 Sep 1;37(17):3966-71.

Two organophosphorus pesticides, diazinon and chlorpyrifos, were used as a model for the development and as a potential application of the TLC passive sampling method.
In field applications, TLC passive sampling was conducted in natural and engineered systems with two silica gel extraction media, C2 and C18.
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11348030 Abu-Qare AW, Abou-Donia MB: Determination of diazinon, chlorpyrifos, and their metabolites in rat plasma and urine by high-performance liquid chromatography. J Chromatogr Sci. 2001 May;39(5):200-4.

The method is based on using C18 Sep-Pak cartridges for solid-phase extraction and HPLC with a reversed-phase C18 column and programmed UV detection ranging between 254 and 280 nm.
1(0,0,0,1) Details
11048846 Gil Garcia MD, Martinez Galera M, Pablos Espada MD, Garrido Frenich A, Martinez Vidal JL: Determination of binary and ternary mixtures of pesticides in wetland waters by gas chromatography using partial least-squares analysis. J AOAC Int. 2000 Sep-Oct;83(5):1068-75.

Three different mixtures of pesticides were resolved with satisfactory results: parathion-methyl, chlorpyrifos-methyl, and vinclozolin; parathion-ethyl, chlorpyrifos, and triadimefon; and endosulfan sulfate and carbophenothion.
The proposed models were applied to the determination of 3 mixtures of pesticides at levels of 0.02-1.00 ng/mL in wetland water samples after a preconcentration step with C18 cartridges, with recoveries ranging from 82.7 to 117.4%.
1(0,0,0,1) Details
18969198 Tan BL, Ali Mohd M: Analysis of selected pesticides and alkylphenols in human cord blood by gas chromatograph-mass spectrometer. Talanta. 2003 Nov 4;61(3):385-91.

The pesticides are lindane, diazinon, alpha-endosulfan, beta-endosulfan, endosulfan sulfate, chlorpyrifos and endrin; while the alkylphenols are 4-n-butylphenol, 4-n-pentylphenol, 4-n-hexylphenol, 4-t-octylphenol, 4-n-heptylphenol, nonylphenol, 4-n-octylphenol and bisphenol A.
The pesticides and alkylphenols in the cord blood samples were extracted with solid phase extraction IST C18 cartridges and analyzed by selected ion monitoring mode using quadrapole detector in Shimadzu QP-5000 gas chromatograph-mass spectrometer.
1(0,0,0,1) Details
9145509 Cho Y, Matsuoka N, Kamiya A: Determination of organophosphorous pesticides in biological samples of acute poisoning by HPLC with diode-array detector. Chem Pharm Bull. 1997 Apr;45(4):737-40.

We have developed a simple and rapid method for measuring 11 organophosphorous pesticides (dichlorvos, methidathion, salithion, malathion, fenitrothion, fenthion, parathion, diazinon, ethylthiometon, O-ethyl O-(4-nitrophenyl) phenylphosphonothioate (EPN) and chlorpyrifos) and one metabolite (3-methyl-4-nitrophenol) of fenitrothion in serum and urine of acute poisoning patients by HPLC with a diode-array detector.
An aliquot of the biological sample after deproteinization by acetonitrile was injected into C18 column using acetonitrile-water as a mobile phase.
1(0,0,0,1) Details
9709254 Bushway RJ, Fan Z: Complementation of GC-AED and ELISA for the determination of diazinon and chlorpyrifos in fruits and vegetables. J Food Prot. 1998 Jun;61(6):708-11.

Produce was extracted in methanol by Polytron homogenization and cleaned up and concentrated using Sep-Pak C18 cartridges.
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12698228 Pitarch E, Serrano R, Lopez FJ, Hernandez F: Rapid multiresidue determination of organochlorine and organophosphorus compounds in human serum by solid-phase extraction and gas chromatography coupled to tandem mass spectrometry. Anal Bioanal Chem. 2003 May;376(2):189-97. Epub 2003 Apr 16.

Analytes were isolated by solid-phase extraction using C18 cartridges with subsequent analysis by GC-MS/MS using a glass liner packed with CarboFrit in the GC injection port.
Chlorpyrifos, HCB, p, p'-DDE and the higher chlorinated PCBs (153, 138 and 180) were the most frequently detected compounds.
1(0,0,0,1) Details
11386641 Abu-Qare AW, Abou-Donia MB: Simultaneous determination of chlorpyrifos, permethrin, and their metabolites in rat plasma and urine by high-performance liquid chromatography. J Anal Toxicol. 2001 May-Jun;25(4):275-9.

The method is based on using C18 Sep-Pak cartridges for solid-phase extraction and reversed-phase HPLC.
1(0,0,0,1) Details
8556144 Lacorte S, Barcelo D: Determination of organophosphorus pesticides and their transformation products in river waters by automated on-line solid-phase extraction followed by thermospray liquid chromatography-mass spectrometry. J Chromatogr A. 1995 Sep 29;712(1):103-12.

The trace-level determination of ten priority organophosphorus (OP) pesticides (e.g., chlorpyrifos-methyl, diazinon, disulfoton, fenthion, fenamiphos) and various transformation products (TPs; e.g., disulfoton sulfoxide, fenthion sulfoxide etc.) using automated on-line solid-phase extraction (SPE) with C18 precolumns followed by LC-MS and thermospray interface with time-scheduled selected-ion monitoring (SIM) was developed.
81(1,1,1,1) Details
12477195 Mersie W, Clegg C, Wauchope RD, Dumas JA, Leidy RB, Riley MB, Young RW, Mattice JD, Mueller TC, Senseman SA: Interlaboratory comparison of pesticide recovery from water using solid-phase extraction disks and gas chromatography. J AOAC Int. 2002 Nov-Dec;85(6):1324-30.

From in-house eluted disks, bifenthrin and chlorpyrifos were recovered at 118 and 105%, whereas chlorothalonil showed 71% recovery, indicating that poor recovery from surface water was due to loss during shipping rather than low retention by the C18 disks.
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11128134 Mueller TC, Senseman SA, Wauchope RD, Clegg C, Young RW, Southwick LM, Riley MB, Moye HA, Dumas JA, Mersie W, Mattice JD, Leidy RB: Recovery of atrazine, bromacil, chlorpyrifos, and metolachlor from water samples after concentration on solid-phase extraction disks: interlaboratory study. J AOAC Int. 2000 Nov-Dec;83(6):1327-33.

An interlaboratory comparison was conducted in 1997 and 1998 to examine the feasibility of using C18 solid-phase extraction disks (Empore) to simultaneously determine the herbicides atrazine, bromacil, and metolachlor and the insecticide chlorpyrifos in water samples.
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