Simultaneous Determination of Six Inorganic Anions in Tobacco Leaves with Ion Chromatography

Six inorganic anions including F-, Cl-, NO-_2, Br-, SO 2-_4 and NO-_3 in tobacco leaf samples were extracted by ultrasonic wave with deionized water at 60℃ for 30 minutes, separated on Dionex AS18 column, with IonPac AG18 as guard column and ASRS-ULTRA Ⅱ as regenerative depressor, using the solution of 23mmol/L KOH as eluent (flow rate: 1.00mL/min), and detected by conductivity detector. It was found that the recoveries of the method were between 95.0% and 105.0%, the relative standard deviation was ≤ 2.63%, the correlation coefficients of linear regression equations were from 0.9940 to 0.9988 and the detection limits of the anions were in the range of 0.01 to 0.06μg/mL.