HG/T 4075-2008 工业用三氯化磷 正磷酸含量的测定 分光光度法

HG/T 4075-2008 The determination of the content of orthophosphoric acid in industrial triphenylphosphine oxide by spectrophotometry. (Note: This text should be accompanied by the context for interpretation, especially since "industrial triphenylphosphine oxide" is a specific chemical compound.)