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用价廉、易得的二甲酚橙作显色剂，分光光度法测定了赖氨酸锌糖浆、硫酸锌糖浆和赖氨酸锌含量，并与PAN法和锌试剂法进行了比较。结果表明，本法与PAN法和锌试剂法结果基本一致，回收率高，精密度较好，灵敏度较高。说明可用本法代替PAN法或锌试剂测定锌糖浆剂及锌化合物的含量。
The cheap and readily available xylenol orange as a chromogenic reagent, spectrophotometric determination of lysine zinc syrup, zinc sulfate syrup and lysine zinc content, and with the PAN method and the zinc reagent method were compared. The results show that this method is basically consistent with the results of the PAN method and the zinc reagent method, and the recovery rate is high, the precision is good, and the sensitivity is high. This method can be used instead of PAN method or zinc reagent determination of zinc syrup and zinc compound content.