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定量的FeCl_3加入到待分析的植酸钙溶液中,在1/6N HC1中于100℃加热15分,产生植酸铁沉淀。滤去沉淀后,过量的Fe~(3+)用硫氰酸铁比色法测定。由沉淀的Fe~(3+)量算出植酸钙的含量。
Quantitative FeCl_3 was added to the phytate solution to be analyzed and heated in 1/6 N HC1 at 100 ° C for 15 minutes to produce a phytate precipitate. After the precipitate was filtered off, the excess Fe 3+ was measured by the thiocyanate colorimetric method. Calcium phytate content was calculated from the amount of precipitated Fe 3+.