中华人民共和国国家标准
NATIONAL
STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 20931.9-2007
Methods for chemical analysis of lithium - Determination of nitrogen content - Mercuric potassium iodide spectrophotometric method 锂化学分析方法 氮量的测定 碘化汞钾分光光度法
Issued Date:2007-04-30
Implemented Date:2007-11-01
Issued by:
The Standardization Administration of the People's Republic of China