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采用过量的Ｆｅ（Ⅲ）使植酸完全络合为植酸铁而沉淀，剩余Ｆｅ（Ⅲ）再用磺基水杨酸（ＳＳＡ）显色法来测量，通过建立吸光度—浓度曲线以求得植酸的含量。
Excess Fe (Ⅲ) was used to complete the complexation of phytic acid with phytate and precipitate, and the remaining Fe (Ⅲ) was measured with sulfosalicylic acid (SSA) colorimetric method. The absorbance-concentration curve was used to obtain Phytic acid content.