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国家化工行业标准过磷酸钙中有效磷含量的测定 ,磷的萃取分两步 ,首先用水萃取水溶性磷 ,然后用碱性柠檬酸铵萃取枸溶性磷 ,操作复杂。EDTA溶液配制简单 ,成本低 ,更加方便的是使用EDTA溶液可一次萃取水溶性磷和枸溶性磷 ,简化了分析检测步骤 ,缩短了检测时间。1 实验部分( 1)
Determination of available phosphorus content in national chemical industry standard superphosphate, phosphorus extraction in two steps, first water-extracted water-soluble phosphorus, and then citric acid with alkaline citric acid soluble phosphorus extraction, complex operation. EDTA solution preparation is simple, low cost, more convenient is the use of EDTA solution can be once extracted water-soluble phosphorus and citric acid soluble phosphorus, simplifying the analysis and detection steps, reducing the detection time. 1 experimental part (1)