朱砂主含硫化汞(Hgs)。85年版《药典》规定本品含硫化汞不得少于96％。最近我们发现一批掺伪朱砂,系县医药公司从湖南辰州购进,硫化汞含量测定结果大大低于《药典》标准。此批掺伪朱砂性状与正品极为相似,唯色深而晦暗。含量测定过程中,加硫酸与硝酸钾,加热溶解不完全,继加硫酸铁铵指示液,溶液呈乳白色混浊。测定结果:含 Cinnamon contains mercury sulphide (Hgs). The 85th Edition “Pharmacopoeia” stipulates that the product contains not less than 96% mercury sulfide. Recently, we discovered a batch of adulterated cinnabar, which was purchased by Chenxian Pharmaceutical Company from Chenzhou, Hunan. Mercury sulfide content was found to be much lower than the “Pharmacopoeia” standard. This batch of adulterated cinnabar traits is very similar to genuine ones, with dark and dark colors. During the determination of the content, sulfuric acid and potassium nitrate were added, and the heating and dissolving were incomplete. After adding the ammonium ammonium sulfate indicator solution, the solution was milky and cloudy. Measurement result: including