摘要
应用质量控制方法测定了２种国产商品多氯联苯（ＰＣＢｓ）中１７个２，３，７，８位有氯取代的二 同族体，获得准确的定量结果，加入￣（１３）Ｃ标记物的ＰＣＢｓ样品用多级酸碱硅胶柱和氧化铝柱提取分离，用毛细管色谱／高分辨质谱定量，２种样品中都含有较多的２，３，７，８－ＴＣＤＦ和２，３，７，８－Ｐ＿５ＣＤＦ。１￣＃ＰＣＢ的２，３，７，８－ＴＣＤＤ毒性当量值为２１７ｎｇ／ｇ，２￣＃ＰＣＢ为４１７ｎｇ／ｇ，毒性主要来自ＰＣＤＦｓ，并与国外同类商品ＰＣＢｓ作了比较。
Seventeen 2,3,7,8-substituted PCDD/Fs congeners in Chinese commercial PCBswere determined by HRGC/HRMS.PCRs samples spiked with the surrogate standard mix-ture of￣(13)C-labelled PCDD/Fs were applied to multilayer acid/base silica column and basic a-lumina column to remove the inteferences. Quantitative analysis was carried out by HRGC/HRMS. Absolutely no PCDDs was founded in two Chines commercial PCBs,whereas thecontent of PCDFs were found in PCBs preducts,Acute toxic 2,3,7,8-TCDF and 2,3,4,7,8-P_5CDF congeners were detected in both samples,The comparison with commercialPCBs from other countries was conducted as well.In addition , quality control and qualityassurance requirements for quantitative analysis of seventeen toxic PCDD /Fs congeners byHRGC/HRMS were addressed.
出处
《环境科学学报》
CAS
CSSCI
CSCD
北大核心
1995年第4期433-439,共7页
Acta Scientiae Circumstantiae
基金
国家"八五"科技攻关项目
国家自然科学基金项目
