地表水在线VOCs监测仪不同校准曲线的适用性探讨

Applicability of Different Calibration Curves of Surface Water Online VOCs Monitor Discuss

为研究气相色谱在线监测仪监测水中不同浓度VOCs的适用性,本研究新建了0~100μg/L校准曲线,并同时使用0~20μg/L、0~100μg/L校准曲线对5~90μg/L浓度的样品进行准确性测试。结果表明0~20μg/L校准曲线对30μg/L以下的痕量VOCs测试具有较高准确度,而0~100μg/L校准曲线对40~90μg/L的高浓度VOCs测试具有较高准确度。由此可以看出,通过调整分析条件,在线气相色谱自动监测仪可适用不同浓度VOCs的监测。

In order to study the applicability of gas chromatography on-line monitor for detecting VOCs at different concentrations in water,a new calibration curve of 0~100 μg/L was created in this study,and at the same time calibration curves of 0~20 μg/L、0~100 μg/L were used for the 5~90 μg/L calibration curve concentration samples were tested for accuracy.The results show that the 0~20 μg/L calibration curve has higher accuracy for the measurement of trace VOCs below 30 μg/L,but the 0~100 μg/L calibration curve has higher accuracy for the measurement of 40~90 μg/L high concentration VOCs Accuracy.So you can see that,by adjusting the analysis conditions,the online gas chromatography automatic monitor can be applied to the monitoring of different concentrations of VOCs.