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研究了用中性柠檬酸铵一次性地提取过磷酸钙样品中有效磷 ,较现行化工行业标准节约时间 1～ 1.5h ,操作简便 ,提取完全 ,本方法测试结果与标准法测试结果相差小于± 0 .15%。
The method of using neutral ammonium citrate to extract the available phosphorus in the sample of the superphosphate once was compared with the current chemical industry standard to save the time by 1 to 1.5 hours. The operation is simple and the extraction is complete. The difference between the method and the standard method is less than ± 0 .15%.