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1四苯硼酸钾重量法测定钾的原理四苯硼酸钾重量法是目前土壤、肥料中钾养分测试应用最广的一种分析方法。其原理是:四苯硼酸钠与待测液中的钾离子反应,生成四苯硼酸钾白色微细沉淀(沉淀剂用量大于理论值1.5～2倍)。
1 potassium tetraphenyl borate gravimetric method to determine the principle of potassium tetraphenylborate gravimetric method is currently the soil, fertilizers, potassium nutrient test is the most widely used an analytical method. The principle is: sodium tetraphenylborate and potassium ions in the test solution reaction to produce potassium tetraphenylborate fine white precipitate (precipitant dosage greater than the theoretical value of 1.5 to 2 times).