摘要
水样中两种除草剂，2，4-滴及灭草松，用SPE法经Oasis HLB柱分离富集。用甲醇及甲基叔丁基醚（10＋90）混合溶剂作洗提液将此两种除草剂从SPE小柱上洗脱，所得洗脱液经吹氮蒸干和用碘甲烷-二氯甲烷溶液及四丁基硫酸氢铵氢氧化钠溶液进行柱前衍生化，所得衍生物经干燥后溶于正己烷1．0mL中，所得溶液供GC-MS测定，所测得的峰面积值与2，4-滴或灭草松的浓度在0．1～5．0mg·L^-1范围内呈线性关系。当用200mL水样进行分析时测得此方法的测定下限（10S／N）依次为0．02μg·L^-1及0．10μg·L^-1。
Two herbicidal chemicals, 2,4-D （dichloro-phenoxy acetic acid） and bentazone in water samples were separated and enriched by SPE on Oasis HLB SPE micro-column. Mixed solvent of CH3 OH and methyl-tert. butyl ether （10＋90） was used to elute the 2 herbicidal chemicals from the column and the eluate was dried by N2- blowing, made up to 1.0 mL with hexane and used for GC-MS determination after pre-column derivatization with iodomethane-dichloromethane （10 ＋ 90） solution and tetra-butyl-ammonium hydrogen sulfate-NaOH solution. Linear relationship between values of peak area and concentration of either 2,4-D or bentazone was obtained in the range of 0. 1-5. 0 mg·L^-1. Values of lower limit of determination （10S/N） found were 0. 02μg·L^-1 for 2,4-D and 0. 10 μg·L^-1 for hentazone when 200 mL of water samples were introduced.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2009年第7期791-793,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
