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A number of parameters that may affect the recovery of pesticides, such as the type of solid\u2010phase extraction cartridge, eluting solvent in single or combination and their volumes, and water pH value were investigated. It showed that three solid\u2010phase extraction cartridges (Strata\u2010X, Oasis HLB, and ENVI\u201018) produced the greatest recovery while ethyl acetate\/dichloromethane\/acetone (45:10:45, 12 mL) followed by dichloromethane (6 mL) was efficient in eluting target pesticides from solid\u2010phase extraction cartridges. Different water pH values (4\u20139) did not show a significant effect on the pesticides recovery. The optimized method was verified by performing spiking experiments with a series of concentrations (0.002\u201310 \u03bcg\/L) in waters, with good linearity, recovery, and reproducibility for most compounds. The limit of detection and limit of quantification of this optimized method were 0.01\u20132.01 and 0.02\u20136.71 ng\/L, respectively, much lower than the European Union environmental quality standard for the pesticides (0.1 \u03bcg\/L) in waters. The proposed method was further validated by participation in an interlaboratory trial. It was then subsequently applied to river waters from north\u2010east Scotland, UK, for the determination of the target pesticides.<\/jats:p>","DOI":"10.1002\/jssc.201400855","type":"journal-article","created":{"date-parts":[[2014,10,1]],"date-time":"2014-10-01T06:25:24Z","timestamp":1412144724000},"page":"3699-3705","source":"Crossref","is-referenced-by-count":11,"title":["Simultaneous extraction and determination of various pesticides in environmental waters"],"prefix":"10.1002","volume":"37","author":[{"given":"Zulin","family":"Zhang","sequence":"first","affiliation":[{"name":"The James Hutton Institute  Craigiebuckler Aberdeen UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Thibault","family":"Lefebvre","sequence":"additional","affiliation":[{"name":"The James Hutton Institute  Craigiebuckler Aberdeen UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christine","family":"Kerr","sequence":"additional","affiliation":[{"name":"The James Hutton Institute  Craigiebuckler Aberdeen UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mark","family":"Osprey","sequence":"additional","affiliation":[{"name":"The James Hutton Institute  Craigiebuckler Aberdeen UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2014,11,4]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.bios.2013.07.003"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.chroma.2003.12.009"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.chroma.2007.07.061"},{"key":"e_1_2_7_5_1","first-page":"L330","author":"EU Council","year":"1998","journal-title":"Off. 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