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目的建立工作场所空气中二乙撑三胺(DETA)的测定方法。方法按照《工作场所空气中有毒物质检测方法研究规范》的要求,对空气中DETA通过用浸渍异硫氰酸-1-萘酯(NTIC)的XAD-2树脂吸附,二甲基甲酰胺(DMF)解吸,用氰基柱分离后,高压液相色谱紫外检测器检测,以保留时间定性,峰面积定量。结果该方法在0-12μg/ml范围呈线性关系,样品在吸附管中可保存7 d,方法重现性好,不同浓度的相对标准偏差(RSD)为1.01%～6.67%,方法检出限为0.051μg/ml,平均解吸效率为100.3%,平均采样效率为98.8%,120 mg吸附管对DETA的穿透容量是0.607 mg,空气中与DETA共存的乙二胺在该方法条件下不干扰测定。结论该方法各项指标均达到《工作场所空气中有毒物质检测方法研究规范》的要求,适用于工作场所空气中DETA的现场监测。
Objective To establish a method for the determination of DETA in workplace air. Methods According to the requirements of the “Study Methods for Determination of Toxic Substances in Workplace Air”, DETA in air was adsorbed on XAD-2 resin impregnated with 1-naphthyl isothiocyanate (NTIC), dimethylformamide (DMF ) Desorption, with a cyano-column separation, high-pressure liquid chromatography UV detector detection, retention time qualitative, peak area quantitative. Results The method was linear in the range of 0-12μg / ml. The sample was stored in an adsorption tube for 7 days. The method was reproducible. The relative standard deviations (RSDs) of different concentrations were 1.01% ~ 6.67% Was 0.051μg / ml, the average desorption efficiency was 100.3%, the average sampling efficiency was 98.8%, the penetrating capacity of 120 mg adsorbent tube for DETA was 0.607 mg, ethylenediamine coexisted with DETA in the air did not interfere Determination. Conclusion The method of the indicators have reached the “workplace air toxic substances testing methods research” requirements, applicable to the workplace air DETA on-site monitoring.