摘要
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 。
The reagent trichloro chlorophosphonazo form complex with Ca 2+ and Mg 2+ in borax buffer solution. The calcium and magnesium were determined simultaneously by using multiwavelength linear regression spectrophotometry. The average recovery of calcium and magnesium in synthetic samples were 94～105% and 95～104% respectively. The method has been applied to the determination of calcium and magnesium in food with satisfactory results.
出处
《食品与发酵工业》
CAS
CSCD
北大核心
2002年第1期53-55,共3页
Food and Fermentation Industries
关键词
分光光度法
多波长线性回归法
钙
镁
食品
测定
spectrophotometry, multiwavelength linear regression,calcium, magnesium, food
