Determination of Sulfide in Source Water by Ion Chromatography-Pulsed Amperometric Detector / 环境与健康杂志

ABSTRACT

Objective To develop a new method for the determination of inorganic sulfide in source water by ion chromatography combined with pulsed amperometric detector.Methods The source water samples were injected into ion chromatography system after being filtrated with 0.22 ?m nylon membrane.100 mmol/L of NaOH-250 mmol/L of the NaOAc-0.5% (V/V) ethylenediamine was used as the eluent,special polarizable anions separation column IonPac 3AS7 was selected and sulfide was separated from other anions by isocratic eluent following by three-waveform pulsed amperometric detection.Results The liner range of determination for sulfide was 5-1 000 ?g/L,the equation of linear regression was y=0.325 4x-1.305 3.The detection limit was 0.5 ?g/L,the recovery rates were in the range of 90.8%-96.7%,and the relative standard deviation was 1.32%.Conclusion The method is simple with good selectivity,high sensitivity and good reproducibility and is applicable to the determination of inorganic sulfide in source water.