Study on the Ion Flotation Spectrophotometric Determination of Trace Amount Sulfide Ion in Water——Application of Computer Simplex Optimization

This paper deals with ion flotation spectrophotomtric detrmination of trace amount sulfide ion in water with modified simplex method (MSM) of multifactor optimiztion control by means of IBM-PC computer. The optimization condition of enrichment and determination can be obtained. The determining range of linearity of sulfide ion concentration was 0.002-0.04mg/L. The recovery ratio of this method was 92%-99%, the relative standard deviation was less than 1.3%, and the limit of detection was 0.0005 mg/L. This method has a good feasibility. reproducibility, precision and satisfactory recovery ratio.