衍生气相色谱法在环境监测中的应用探究

Exploration of the Application of Derivative Gas Chromatography in Environmental Monitoring

在当前的环境监测中,以硫酸二甲酯污染物的测定为例,常用方法为硅胶管采样-衍生-液相色谱法检测。不过结合实际的测定看,该方法存在反应时间长、样品损失、方法复杂等问题,不利于提高环境监测作业的质量。为此,本文在了解硫酸二甲酯后,提出了柱前衍生-气相色谱-氢火焰离子检测器的测定方法,并对测定原理、具体方案及准备工作进行分析。最后,从工作曲线、测定范围、检出限、最低检出浓度、精密度、加标回收率等方面分析新测定方法的有效性,并在方法实际应用验证后,新方法能减少操作步骤和提高检测精度。

In current environmental monitoring,taking the determination of dimethyl sulfate pollutant as an example,the commonly used method is silicone tube sampling derivatization liquid chromatography detection.However,based on actual measurements,this method has problems such as long reaction time,sample loss,and complex methods,which are not conducive to improving the quality of environmental monitoring operations.Therefore,after understanding dimethyl sulfate,this article proposes a determination method of pre column derivatization gas chromatography hydrogen flame ionization detector,and analyzes the determination principle,specific scheme,and preparation work.Finally,the effectiveness of the new measurement method is analyzed from the aspects of working curve,measurement range,detection limit,minimum detectable concentration,precision,and spiked recovery rate.After practical application verification,the new method can reduce operational steps and improve detection accuracy.