Chemical reagent . potassium pyrosulfate 化学试剂.焦硫酸钾
2.
Methods for chemical analysis of copper - chromium - zirconium alloys . the determination of zinconium by arsenazo photometric method after fuse with potassium phrosuifate 铜铬锆合金化学分析方法.焦硫酸钾熔融?偶氮胂光度法测定锆