土壤中多氯联苯成分分析标准物质的研制与定值

Preparation,Testing and Certification of Soil Reference Materials for Polychlorinated Biphenyls

介绍了土壤中多氯联苯成分分析标准物质研制与定值方法。土壤采自我国东部某变压器油污染地区,经过风干、研磨、筛分、烘干和混匀后加工处理并装1000瓶。随机抽取20瓶做瓶间均匀性检验;随机抽取两瓶,每瓶取5份,做瓶内均匀性检验。分析测试结果经过F检验和t检验,在95%置信区间内。经过一年时间-18℃和20℃稳定性检验,分析测试结果经过t检验在95%置信区间内。标准物质利用同位素稀释质谱法对14种共平面和指示性多氯联苯同类物定值,并经过4个实验室进行试用,进一步验证了定值的准确性。此标准物质于2006年3月通过国家一级标准物质的终审。本实验所提出的有机污染物标准物质的制备方法,对在我国开展环境分析质控产品的研制具有参考和借鉴价值。

A methodology for preparing the reference material of polychlorinated biphenyls （PCBs） in soil is described. The soil sample collected from a polluted area in east of China was dried, ground, homogenized, packed and tested on stability and homogeneity. The materials were analyzed by isotope-dilution mass spectrometry. And then the analysis results were validated by four laboratories. The contents of six indicator congeners （CB28, CB52, CB101, CB138, CB153 and CB180） and eight dioxin-like congeners （CB77, CB81, CB105, CB114, CB118, CB156, CB157, CB167） were certified for this material. The material was intended for use in the method validation and quality control for congener-specific of PCBs in soil or sediments.