【摘要】 目的 建立工作场所空气中矿物油雾测定的红外分光光度法。方法 工作场所空气中的矿物油雾以玻璃纤维滤膜采样，用四氯化碳洗脱，以四氯化碳中石油类标样为标准溶液，采用红外分光测油仪定量测定。结果 玻璃纤维滤膜采样效率为94.8%～99.2%，洗脱效率为95.6%～104.2%。矿物油雾在质量浓度为1.00～120.00 mg/L时线性关系良好，相关系数为0.999 4；检出限为0.52 mg/L，定量下限为1.74 mg/L；平均加标回收率为98.8%～104.1%，批内、批间相对标准偏差分别为2.2%～6.4%和2.3%～5.2%；样品在常温下可保存7 d，适用于所有使用矿物油的工作场所空气采样。结论 本方法灵敏高、结果准确、操作简便，适用于工作场所空气中矿物油雾浓度测定。更多还原

【Abstract】 Objective To establish an infrared spectrophotometric method for determination of mineral oil mist in workplace air. Methods The mineral oil mist in workplace air was sampled with glass fiber filter membrane and eluted with carbon tetrachloride. Petroleum-like standard solution of carbon tetrachloride was used as the calibration standard, and quantitative analysis was performed using infrared spectrophotometric oil analyzer. Results The sampling efficiency of the glass fiber filter membrane ranged from 94.8% to 99.2%, and the extraction efficiency ranged from 95.6% to 104.2%. The linear range of mineral oil mist was 1.00-120.00 mg/L, with a correlation coefficient of 0.999 4. The detection limit was 0.52 mg/L, and the quantification limit was 1.74 mg/L. The average recovery rate ranged from 98.8% to 104.1%. The within-and between-run relative standard deviations were 2.2%-6.4% and 2.3%-5.2%, respectively. The samples were stable at room temperature for seven days. This method could be used for air sampling of mineral oil mist in workplaces where mineral oil is used.Conclusion The method is sensitive, accurate, and efficient, which is suitable for determining the concentration of mineral oil mist in workplace air.更多还原