研究论文
李灵军,蒋可.13C同位素稀释法测定国产多氯联苯的2,3,7,8－TCDD毒性当量[J].环境科学学报,1995,15(4):433-439
13C同位素稀释法测定国产多氯联苯的2,3,7,8－TCDD毒性当量
- DETERMINATION OF TOXIC EQUIVALENTS OF PCDD /Fs IN TWO CHINESE COMMERCIAL PCBs BY C ISOTOPE DILUTION METHOD
- 基金项目：国家“八五”科技攻关项目;国家自然科学基金
- 作者
- 单位
- 李灵军
- 中国科学院生态环境研究中心,北京 100085
- 蒋可
- 中国科学院生态环境研究中心,北京 100085
- 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13C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-P5CDF.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
- Abstract：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 13C-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-P5CDF 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.
- Key words：?13)C isotope dilution method 2 3 7 8-TCDD TEQ quality control and assurance Chinese commercial PCBs
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