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  • Title: [Determination of diethyl phthalate in the air of workplace by gas chromatography].
    Author: Zhang B, Li SS, Li L, Wei HY, Zhang MP, Zou W, Zhang ZH.
    Journal: Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi; 2018 Aug 20; 36(8):630-633. PubMed ID: 30317819.
    Abstract:
    Objective: To establish a method for the determination of diethyl phthalate by gas chromatography in the air of workplaces. Methods: Diethyl phthalate in the air of workplace was collected throμgh glass fiber filter, eluted with methylbenzene, and detected by gas chromatography coupled with FID detectors. Results: The linear range of diethyl phthalate determined by this method was 14.0~1 400 μg/ml, y=2.09801x-3.66229, and the coefficient correlation was 0.999 99. The detection limit was 1.10 μg/ml, and the minimum detection concentration was 0.18mg/m(3) (collected sample volume was 30 L) . The within-run precisions were 1.04%~2.75%, and the between-run precisions were 0.34%~1.30%. The recovery rates were 98.72%~103.21%, and sampling efficiency was 97.2%~100.0%. The elution efficiencies were 97.25%~98.68%. The samples could be stored at room temperature for 15 days. Conclusion: The indicators established in this study were conformed with the requirements of GBZ/T210.4-2008, "The Guidelines for the Development of Occupational Hygiene Standards Methods Part 4: Determination of Chemical Substances in the Air of Workplaces" . Diethyl phthalate in the workplace air could be rapidly collected, accurate separated and determinated. This method is applicable to the determination of diethyl phthalate in the workplace air. 目的： 建立工作场所空气中邻苯二甲酸二乙酯测定的气相色谱法。 方法： 工作场所空气中的邻苯二甲酸二乙酯通过玻璃纤维滤膜采集，经甲苯洗脱后以气相色谱结合FID检测器分离测定分析。 结果： 该方法所测定的邻苯二甲酸二乙酯线性范围为14.0~1400 μg/ml，y=2.098 01x-3.662 29，相关系数为0.999 99，检测限为1.10 μg/ml，最低检出浓度为0.18 mg/m(3)（采集空气样品体积以30 L计算），批内精密度为1.04%~2.75%，批间精密度为0.34%~1.30%，加标回收率为98.72%~103.21%，采样效率为97.2%~100.0%，洗脱效率为97.25%~98.68%，样品在常温下可保存15 d。 结论： 本次研究所建立的测定方法中各项指标均符合GBZ/T210.4-2008《职业卫生标准制定指南第4部分工作场所空气中化学物质测定方法》中相关要求，分离测定准确，适用于工作场所空气中邻苯二甲酸二乙酯浓度的测定。.
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