DIN 51086-3-2007 陶瓷、玻璃和釉料的氧化原料和基本材料的試驗.第3部分:分光光度法測定三價鉻中的二苯肼基羰的六價鉻
Testing of oxidic raw and basic materials for ceramics, glass and glazes - Part 3: Spectrophotometric determination of chrome(VI) with diphenyl carbazide in the presence of chrome(III)