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对36名苯作业者终末呼出气(Ca),尿液中苯浓度(Cu)及其环境空气浓度(TWA)作了测定,结果显示:TWA 与 Ca、Cu 有较好的线性相关,并由此提出了终末呼出气(班末、第二天班前)及尿液中(班末)苯的生物暴露限值的建议值分别为6.5mg/m~3,1.0mg/m~3和0.14μmol/L.
The end-to-end expiration (Ca), benzene concentration (Cu) and ambient air concentration (TWA) in 36 benzene workers were measured. The results showed that there was a good linear correlation between TWA and Ca and Cu The proposed bio-exposure limits for end-expired air (at the end of the shift, before the second shift) and in the urine (shift) benzene were 6.5 mg / m 3 and 1.0 mg / m 3, respectively And 0.14 μmol / L.