硝石化学成分研究  

Study on Chemical Composition of Niter

作　　者：邵江娟[1] 吕翔[1] 路长珍[1] 刘幸平[1] 

机构地区：[1]南京中医药大学药学院,江苏南京210046

出　　处：《南京中医药大学学报》2010年第4期306-307,I0004,共3页Journal of Nanjing University of Traditional Chinese Medicine

基　　金：国家药典委员会项目(YS-138)

摘　　要：目的研究硝石的化学成分。方法采用X射线粉末衍射法对硝石进行了定性物相分析,采用四苯硼钠沉淀法对主要成分硝酸钾进行了含量测定,采用电感耦合等离子体发射质谱法对重金属元素进行了检测。结果硝石中主要化学成分为硝酸钾,含量达80%以上;砷是硝石中的主要重金属元素,各类重金属含量均低于百万分之二。结论方法稳定、可靠,可为建立硝石质量标准提供依据。OBJECTIVE To study the chemical composition of Niter METHOD X-ray Powder Diffraction Method was used in the qualitative phase analysis of Niter,with Sodium tetraphenylborate precipitation used in the measurement of potassium nitrate＇s concentration and Inductive Coupled Plasma Mass Spectrometry used in the detection of heavy metal elements.RESULT The major chemical component of Niter is potassium nitrate for a concentration over 80%.The concentration of all kinds of heavy metals is lower than 2 millionths,with which Arsenic is the major component.CONCLUSION Methods used in the study prove to be stable and reliable,which is helpful in the setting of quality standards of Niter.

关 键 词：硝石 含量测定 重金属检测 

分 类 号：R284.2[医药卫生—中药学]