Abstract：The water-soluble fluoride (F-) in silver concentrate can enter into biosphere with rainwash and directly cause harm to the soil, water system, atmosphere and human being. The determination of water-soluble fluoride in silver concentrate by ultrasonic extraction-ion chromatography was proposed. It provided important technical support for the detection of water-soluble fluoride in silver concentrate and subsequent environmental impact assessment. 0.2g of sample (passing through 150-mesh sieve) was added into 30mL of water. After ultrasonic extraction at 40℃ for 20min, the anion exchange column was employed for separation. The mixture solution of sodium carbonate-sodium bicarbonate was used as leacheate for elution. The elution time was 25min. The content of water-soluble fluoride was detected by electrical conductivity detector. The mass concentration of F- in range of 0.5-10mg/L was linear to the corresponding peak area. The linear correlation coefficient of calibration curve was 0.9998. The detection limit was 0.062mg/L and the low limit of determination was 0.21mg/L. The content of water-soluble fluoride in two silver concentrate samples was determined according to the experimental method. The relative standard deviation (RSD, n=6) of determination results was 3.8% and 4.3%, respectively. The recoveries were between 92% and 102%.
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