Dissolved ratio of mineral drugs sulphur and preparation drugs in acidmedium and alkli medium and neutral mJium is determined by the method ofcombustion iodometry.

• 采用燃烧碘量法测定了矿物药硫黄及其炮制品在酸性（人工胃液）、碱性和中性介质中的溶出率，结果表明炮制后的硫黄溶出率均高于天然硫黄的溶出率。