Ion chromatography was used to determine the halogen-free quality control sample EC-681K in the electronics industry. The Metrosep A Supp4-250 anion analysis column was used. 1.8mmol / L Na2CO3 + 1.7mmol / L NaHCO3 eluent Oxygen bomb combustion method is used to process the sample, and then it is absorbed by the absorption liquid, and then filtered to be measured after constant volume. In the range of 0.5 ~ 2.5mg / L, the Cl- and Br- concentrations have a good linear relationship with the chromatographic peak area, and the correlation coefficients are 0.9999 and 0.9998, respectively. The recovery rates of Cl- and Br- in EC-681K are 94.1% and 91.9%, and the precision is 2.5% and 2.1% respectively, which meet the requirements of EN 14582. This method can be used for halogen-free analysis of electronic products.
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