title: [Application of Stir Bar Sorptive Extraction and Gas Chromatograph Mass Spectrometer to the Phthalic Acid Esters Analysis in Seawater].
abstract: For the determination of trace amounts of phthalic acid esters (PAEs) in complex seawater matrix, a stir bar sorptive extraction gas chromatography mass spectrometry (SBSE-GC-MS) method was established. Dimethyl phthalate (DMP), diethyl phthalate (DEP), dibutyl phthalate (DBP), butyl benzyl phthalate (BBP), dibutyl phthalate (2-ethylhexyl) phthalate (DEHP) and dioctyl phthalate (DOP) were selected as study objects. The effects of extraction time, amount of methanol, amount of sodium chloride, desorption time and desorption solvent were optimized. The method of SBSE-GC-MS was validated through recoveries and relative standard deviation. The optimal extraction time was 2 h. The optimal methanol content was 10%. The optimal sodium chloride content was 5% . The optimal desorption time was 50 min. The optimal desorption solvent was the mixture of methanol to acetonitrile (4:1, volume: volume). The linear relationship between the peak area and the concentration of PAEs was relevant. The correlation coefficients were greater than 0.997. The detection limits were between 0.25 and 174.42 ng x L(-1). The recoveries of different concentrations were between 56.97% and 124.22% . The relative standard deviations were between 0.41% and 14.39%. On the basis of the method, several estuaries water sample of Jiaozhou Bay were detected. DEP was detected in all samples, and the concentration of BBP, DEHP and DOP were much higher than the rest.
authors: Chen-chen
authors: CC
authors: Gao
authors: Feng-min
authors: FM
authors: Li
authors: Lun
authors: L
authors: Lu
authors: Yue
authors: Y
authors: Sun
mesh_terms: D003993:Dibutyl Phthalate; D004051:Diethylhexyl Phthalate; D004952:Esters / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D000432:Methanol; D010795:Phthalic Acids / Q000032:analysis*; D012623:Seawater / Q000737:chemistry*; D012997:Solvents
chemical_list: D004952:Esters; D010795:Phthalic Acids; D012997:Solvents; C024629:dimethyl phthalate; D003993:Dibutyl Phthalate; C032279:phthalic acid; D004051:Diethylhexyl Phthalate; C007379:diethyl phthalate; D000432:Methanol; C027561:butylbenzyl phthalate