Methods for chemical analysis of copper - chromium - zirconium alloys . the determination of magnesium by chromotrope 2r photometric method 铜铬锆合金化学分析方法.铜试剂分离?铬变酸2r光度法测定镁
Textiles - determination of formaldehyde - method for the determination of total and free water extraction method formaldehyde using chromotropic acid 纺织品.甲醛的测定.使用铬变酸法测定甲醛的总含量和游离部分