Analysis and Comparison of VOCs Monitoring Technology

Analysis and Comparison of VOCs Monitoring Technology

Sensor technology: Common sensors for PID, FID; PID sensor response to low alkanes; FID sensor sensitive to hydrocarbon; Both monitoring accuracy up to PPb, but can not distinguish between VOCs species; Commonly used in hazardous area alarm, indoor air monitoring ;

Chromatography: The total amount of VOCs and characteristic components can be measured by column separation; however, the analysis cycle is long; it is generally used for on-line monitoring of fixed pollution sources;

Mass spectrometry technology: high sensitivity (ppt), short response time, measurement of many components, no calibration; but the price is relatively expensive; generally used in laboratories, hospitals, environmental emergency / traceability monitoring;

Spectral Technology: Commonly used technologies are FTIR, DOAS, TDLAS; fast response, generally used for regional ambient air monitoring / pollution source monitoring.

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