摘要
提出了同位素稀释-气相色谱-高分辨质谱法测定土壤样品中3种指示性毒杀芬Parlar26(P26)、Parlar50(P50)和Parlar62(P62)。以二氯甲烷-丙酮(1+1)混合液为提取溶剂对土壤样品进行微波萃取,提取液经活化硅胶柱净化分离,洗脱液经氮气吹扫浓缩至100μL后,以13C12-PCB153为同位素内标,在DB-5MS色谱柱上分离,质谱中采用电子轰击离子源。P26、P50和P62的检出限(3.143S)分别为1,3,5pg,测定值的相对标准偏差(n=5)小于6%。方法用于某地区表层土壤中3种指示性毒杀芬的检测,测得P26,P50,P62的含量分别为0.08,0.04,0.03ng·g-1。
A novel method for the determination of 3 indicative toxaphenes comprised of Parlar26 （P26）. Parlar50 （P50） and Parlar62 （P62） in soil was proposed, based on high-resolution double-focusing magnetic MS combined with isotope dilution and （K2. The sample was treated by microwave assisted extraction with a mixture （1 ＋ 1） of dichloromethane and acetone as solvent. The extract was then purified on an activated silica gel column. The eluate was concentrated to 100 pd. by N2-blowing, 13C12- PCB153 was added as internal standard, and the solution was separated on a DISkSMS column. EI was adopted in MS. The detection limits （3. 143S） of P26, PS0 and P62 were 1, 3, 5 pg, respectively. RSI）s （n=5） were all less than 6%. The method was used to determine P26, P50 and P62 in a top soil sample, giving results of 0. 08,0.04 ,0. 03 ng . g -1 , respectively.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2016年第1期7-10,共4页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
江苏省环境监测科研基金项目(1415)
