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在pH =8 .8的硼砂缓冲溶液中 ,三氯偶氮氯膦分别与Ca2 + 和Mg2 + 形成稳定的配合物。用多波长线性回归光度法同时测定钙、镁。合成样品中钙和镁的回收率分别为 94%～ 10 5 %和 95 %～ 10 4%。该方法应用于食品中钙、镁含量的测定 ,结果满意
In pH = 8. 8 borax buffer solution, trichloro-chlorophosphine respectively with Ca2 + and Mg2 + to form a stable complex. Simultaneous Determination of Calcium and Magnesium by Multiwavelength Linear Regression Spectrophotometry. The recoveries of calcium and magnesium in the synthetic samples were 94% -105% and 95% -104%, respectively. The method is applied to the determination of calcium and magnesium in food with satisfactory results