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以某化工总厂生产氯代甲烷的161名工人为观察对象,其中男104人,女57人,工龄1—25年,年龄19—52岁。并以不接触氯代甲烷等有毒物质的该厂74名职工为对照组,其年龄及性别构成与观察组基本相似。采集班后一次尿样用顶空气相色谱法测定尿中甲酸。观察组尿中甲酸含量最大值为52.5mg/L,最小值为1.24mg/L,正常值95％上限值为25.52mg/L。对照组尿中甲酸含量最大值为42.3mg/L,最小值为1.65mg/L,正常值95％上限值为31.
A total of 161 workers producing methyl chloride in a chemical plant were observed, including 104 males and 57 females, aged 1 to 25 years and aged 19-52 years. 74 workers in the plant that did not touch chlorinated methane and other toxic substances were used as the control group, whose age and sex composition were similar to that of the observation group. Urine samples were collected for urinary sodium formate by headspace gas chromatography. In the observation group, the maximum value of formic acid in urine was 52.5mg / L, the minimum was 1.24mg / L, and the upper limit of normal 95% was 25.52mg / L. In the control group, the maximum value of formic acid in urine was 42.3 mg / L, the minimum was 1.65 mg / L, and the upper limit of normal 95% was 31.