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Abstract In this paper, an accurate and rapid detection and analysis technology for six inorganic anions of F-, Cl-, NO3-,Br-, SO42-, PO43- in the discharge water of coalbed methane pipeline by ion chromatography was studied and determined. The detection limit of F-, Cl-, Br-, NO3-, PO43-, SO42-was 0.006,0.004,0.056,0.004,0.048 and 0.006 mg / L, respectively. The recovery rate was 94%～103%, and the relative standard deviation ( RSD ) was less than 2%. All meet the national standard HJ84-2016 ' Determination of inorganic anions (F-, Cl-, NO2-,Br-, NO3-, PO43-, SO32-, SO42-) in water by ion chromatography '. By analyzing the composition of anions in water, it is found that the main limited ions can meet the requirements of the national class II drinking water standard, and can be collected and discharged to the coal mine sewage treatment plant for treatment.
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