Organo-mineral compound fertilizers are digested withsulfuric acid-hydrogen peroxide and nitric acid-perchloric acid, respec-tively, and then their total potassium content is determined.

• 用硫酸－过氧化氢和硝酸－高氯酸分别对有机－无机复混肥料进行消化处理，然后进行总钾含量的测定。