EVALUATION THE PRECISION OF DOCTORE TEST FOR MERCAPTANS DETECTION IN PETROLEUM PRODUCTS BY SULPHIDE ION-SELECTIVE ELECTRODE

Mercaptan sulphur in petroleum products ( motor fuel, kerosene, aviation fuel ,….etc) were detected with standard test method of british institute of petroleum ( ip) that marked by the number ip-30 . the detection of this method was qualitatively and the precision has not been established. in this research a précised results were tabulated for the ip-30 test method, using sulphide ion selective electrode. a comparable results of quantitative value for mercaptans of ip-30 test method now are available