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应用气相色谱法对２３６名“正常人”和３７名“化学工人”血中挥发性氯化烃（ＶＣＨ）进行了测定。“正常人”血中挥发性氯化烃检出率分别是：氯仿（ＣＨＬ）８４％，三氯乙烯（ＴＲＩ）６０％，四氯乙烯（ＴＥＴ）６７％，平均水平分别是：ＣＨＬ５３４ｎｇ／Ｌ，ＴＲＩ１３６ｎｇ／Ｌ，ＴＥＴ３７ｎｇ／Ｌ。“化学工人”血中ＶＣＨ水平明显高于“正常人”，其血中水平分别是：ＣＨＬ２５８９．９ｎｇ／Ｌ、ＴＲＩ５１６．０ｎｇ／Ｌ、ＴＥＴ１７２．３ｎｇ／Ｌ。两者之间有显著性差异（Ｐ＜０．０５）。表明“化学工人”的作业环境中存在ＶＣＨ污染。因而在制订正常人群血中ＶＣＨ水平的正常值范围时，应剔除“化学工人”这部分人群。吸烟者与不吸烟者血中ＶＣＨ水平无显著性差异（Ｐ＞０．０５）。
The volatile chlorinated hydrocarbons (VCH) in blood of 236 “normal people” and 37 “chemical workers” were determined by gas chromatography. The detection rates of volatile chlorinated hydrocarbons in normal people were 84% of chloroform, 60% of trichlorethylene and 67% of tetrachlorethylene, the average levels were CHL534ng / L , TRI136ng / L, TET37ng / L. “Chemical workers” blood VCH levels were significantly higher than “normal”, the blood levels were: CHL2589.9ng / L, TRI516.0ng / L, TET172.3ng / L. There was a significant difference between the two (P <0.05). This indicates that there is VCH contamination in the “Chemical Worker” working environment. Thus in the normal population of normal blood VCH levels in the normal range, should be removed “chemical workers” in this part of the population. VCH levels in smokers and non-smokers had no significant difference (P> 0.05).