采用硫酸钡比浊法法测定叶片中的硫化物。植物样品经强酸的消解和氧化产生硫酸根离子,加起浊剂(BaCl2)硫酸根与钡离子生成微细的硫酸钡胶体(BaSO4)微粒悬浮于溶液中,然后用分光光度计测定其浊度。该法是经典方法,简单实用。 Sulfide in leaves was determined by barium sulfate turbidimetry. Plant samples were digested with strong acids and oxidized to produce sulfate ions, and the precipitated BaSO4 sulfate and barium ions were used to form fine barium sulfate (BaSO4) particles suspended in the solution. The turbidity was then measured by spectrophotometer. The law is a classic method, simple and practical.