Abstract: Objective To develop a method for simultaneous determination of six anions in aquatic products by ion chromatography. Methods Food samples were pre-treated by ultrasonic extraction, high speed centrifugation and solid phase extract clean up, and the resulting supernatants were injected into a high-capacity anion exchange column for separation and detected by suppressed conductivity. Results The linearity of F- and NO2- were satisfying in the range of 0.1~10.0 mg/L. The linearity of Cl-, NO3-, PO3-4, and SO2-4 were good in the range of 1.0~50.0 mg/L. The recovery of the method was 89.8~103.0% and relative standard deviation (RSD) was 3.5~5.7%. The detection limits were F-: 0.6 mg/kg; Cl-: 1.0 mg/kg; NO2-: 2.0 mg/kg; NO3-: 1.6 mg/kg; PO3-4: 4.0 mg/kg; SO2-4: 1.4 mg/kg. Conclusion The method could simultaneously and completely separate all anions in 15 minutes with good accuracy, sensitivity, simplicity and could be applied for inspection of F-, Cl-, NO2-, NO3-, PO3-4 and SO2-4 in aquatic products.
