摘要
研究了天津污灌区严重污染土壤中 1 6种多环芳烃的提取和测定方法 .考察了加速溶剂提取的提取条件、样品净化方法和GC MS测定条件 .结果表明 ,在 1 4 0℃用1∶1二氯甲烷和丙酮提取 5min ,硅胶柱净化后用GC MS测定可以得到很好的效果 .方法回收率在 5 7%— 1 4 0 %之间 ,检测限为 3 5× 1 0 - 4— 1 1× 1 0 - 3 mg·l- 1,且重现性较好 .天津代表性污灌水稻土中 1 6种PAHs的实测浓度为 0 0 7— 1 2 7mg·kg- 1.
A procedure for determination of 16 PAHs in heavily contaminated paddy soil from the waste- water irrigated farmland of Tianjin was developed.The sample was distilled with accelerated solvent extraction(ASE),purified by silica gel column and measured with GC/MS.The optimal condition for the distillation is 140℃ with a mixture of dichloromethane and acetone for 5 min.The recovery rates for the 16 PAHs was in a range of 57%-140% and the detection limits were between 3.5×10 -4 and 1.1×10 -3 mg·l -1.The levels of the PAHs in a composed sample collected from wastewater irrigated farmland is 0.07-1.27mg·kg -1.
出处
《环境化学》
CAS
CSCD
北大核心
2002年第4期392-396,共5页
Environmental Chemistry
基金
国家自然科学基金 ( 4 9971 0 70
4 0 0 31 0 1 0
4 0 0 2 4 1 0 1 )资助项目
