Comparison Between the Determination Methods of 1,2-Dichlorobenzene and 1,4-Dichlorobenzene in the Water by P&T-GC and by Liquid Extraction-GC
In this experiment,two methods,purge trap-GC and liquid-liquid extraction-GC,were established to compare the determination of 1,2-dichlorobenzene and 1,4-dichlorobenzene in the water.The experimental results showed that both methods had good linearity,and the correlation coefficients were greater than 0.995.The accuracy of the recovery rate was high and the precision was good,so two methods were suitable to be used to the determination of 1,2-dichlorobenzene and 1,4-dichlorobenzene in water from the environment.In daily testing,clean water such as surface water,and it was more suitable to choose the method of purge trap-GC.This method was simple to operate,no need to use organic reagents,and didn't cause secondary pollution to the environment.When determination waste water,the method of liquid-liquid extraction-GC was better,because it can reduce the matrix effect and improve the recovery rate.
1,2-dichlorobenzene1,4-dichlorobenzenepurge and trapliquid-liquid extractiongas chromatography
NETL
NSTL
万方数据
