title: [Residual levels of acetochlor in source water and drinking water of China's major cities].
abstract: The concentration levels of acetochlor were investigated in source water and drinking water from 36 major cities in China by solid phase extraction (SPE) combined with gas chromatography - mass spectrometry (GC-MS). Acetochlor detection rate was 66.9% in all the 145 source water samples collected with an average concentration of 33.9 ng L-1. The average removal rate of acetochlor was limited through the drinking water treatment process. The detection concentration of the northeast region was the highest. The concentrations of acetochlor detected in lake were higher than those in river and groundwater as source water. The detection rate and concentration of Liaohe river watershed and the coastal watershed were the highest.
authors: Zhi-Yong
authors: ZY
authors: Yu
authors: Fen
authors: F
authors: Jin
authors: Hong-Yan
authors: HY
authors: Li
authors: Wei
authors: W
authors: An
authors: Min
authors: M
authors: Yang
mesh_terms: D002681:China; D002947:Cities; D060766:Drinking Water / Q000032:analysis*; D004784:Environmental Monitoring; D008401:Gas Chromatography-Mass Spectrometry; D060587:Groundwater / Q000737:chemistry; D060106:Lakes / Q000737:chemistry; D045483:Rivers / Q000737:chemistry; D052616:Solid Phase Extraction; D014052:Toluidines / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification; D014881:Water Supply / Q000032:analysis*
chemical_list: D060766:Drinking Water; D014052:Toluidines; D014874:Water Pollutants, Chemical; C043377:acetochlor