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作者对14名接触甲醇工人(1女、13男)和10名接触甲酸工人(5女、5男)进行了观察。连续3天,以工时法作环境监测,计算呼吸带空气中毒物的时间加权平均浓度。甲醇用气相色谱仪分析;甲酸衍生成相应的对溴苯酰酮酯后,用液相色谱仪分析。个别浓度较高样本,用红外光度计分析。在第4天下班时收集工人尿样,并在次日晨(下班16小时后)再收集一次。尿中甲酸经甲基化转变成N,N-二甲基酰胺,再用气相色谱分析;尿中甲醇也用气相色谱仪分析。尿中甲酸和甲醇浓度都用肌酐排泄量校正。结果发现,甲醇时间加权平均接触范围是50～227μg/L(40～160 ppm)。次日晨尿样甲
The authors observed 14 workers exposed to methanol (1 woman, 13 men) and 10 workers exposed to formic acid (5 women, 5 men). For 3 consecutive days, the working hour method was used for environmental monitoring to calculate the time-weighted average concentration of air poisoning in the respiratory zone. Methanol was analyzed by gas chromatography; formic acid was derivatized to the corresponding p-bromophenonyl ester and analyzed by liquid chromatography. High concentrations of individual samples, with infrared photometer analysis. Workers’ urine samples were collected on the fourth day of get off work and collected again the next morning (after 16 hours). Formic acid in urine is converted to N, N-dimethylamide by methylation and analyzed by gas chromatography. Urine methanol is also analyzed by gas chromatography. Urinary formic acid and methanol concentrations were corrected for creatinine excretion. As a result, it was found that the time-weighted average exposure range of methanol was 50 to 227 μg / L (40 to 160 ppm). Urine sample the next morning