Feasibility Study on Remote Quality Control of VOCs Online Monitoring System
The automatic monitoring of surface water quality requires the main monitoring indicators to have remote quality control function,while there is no clear requirement for online monitoring of VOCs.This article conducted remote standard solution testing on 19 VOCs components in water using a self-designed standard solution storage device and an online monitoring system consisting of a purge capture gas chromatography-hydrogen flame ionization detector/electron capture detector(P&T-GC-FID/ECD).The experimental results show that the online spiked recovery rates of 19 VOCs components are 88.8％～103.8％,and the correlation coefficient range of online multi-point linear testing is 0.995 9～0.999 7.The error range of standard solution testing for 16 consecutive days is-18.91％～21.91％.The results show that the remote quality control of the VOCs online monitoring system is feasible,which can achieve real-time monitoring of instrument performance and effective warning and prediction of water quality.
Volatile organic compoundsGas chromatographyAutomatic monitoringRemote quality control
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