Determination of seven anions in selenium rich mineral water by ion chromatography
The method was established for the simultaneous determination of F-、BrO3-、NO2-、NO3-、SO42-、SeO32-、SeO42-in seleni-um rich mineral water by ion chromatography.Metrosep A Supp 5-250/4.0 anion exchange chromatography column was used as the analytical column,the sample can be determined after through 0.22 µm water filtration membrane,3.2 mmol/L Na2CO3-1.0 mmol/L NaHCO3 was used as the mobile phase,the flow rate was 0.7 mL/min,then by inhibitory conductance detection,the seven kinds of inorganic anions were linearly related in the mass concentration range of 0.025-0.500 mg/L and 0.05-1.00 mg/L,respectively,the correlation coefficients were not less than 0.999,and the detection limits of the method were 0.001 2-0.005 2 mg/L.The standard addition recoveries were 90.9％-107.0％.The relative standard deviations of the measurement results were less than 10％(n=6).The method has low detection limit,simplicity and speed,it can be used for the simultaneous determination of various anions in selenium rich mineral water and other drinking water.
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