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有机物中磷的含量,一般是将样品經过适当的破坏处理后,采用磷酸銨鎂重量法、磷钼酸銨重量法或容量法等进行測定。Stanley测定卵磷脂的磷时,曾采用硝酸鈾酰滴定法、比色法、分光光度法等。近年来随着分析化学的迅速发展,許多新的分析方法如离子交換法、络合滴定法被应用来测定磷的含量已获得了相当的进展。Flaschka及Frank将磷作成磷酸銨鎂沉淀,再用EDTA滴定鎂,从而求得磷的含量。此法虽較經典的重量法改进了一步,但仍免不了沉淀、过滤、洗滌等操作手續。最近
The content of phosphorus in organic matter is generally determined by appropriate destructive treatment of the sample, using ammonium magnesium phosphate gravimetric method, ammonium phosphomolybdate gravimetric method or volumetric method. Stanley determination of lecithin phosphorus, uranyl nitrate titration, colorimetry, spectrophotometry and so on. In recent years, with the rapid development of analytical chemistry, many new analytical methods such as ion exchange, complexometric titration have been applied to determine the phosphorus content has made considerable progress. Flaschka and Frank make phosphorus ammonium phosphate precipitation, and then EDTA titration magnesium, so as to obtain the phosphorus content. This method is better than the classic gravimetric method one step, but still inevitably sedimentation, filtration, washing and other procedures. recent