This paper suggested am-cresol purple, which could determine quantitatively the content of total acid in vinegar.
利用间甲酚紫作指示剂定量地测定食醋中总酸的含量。
Colors and total anthocyanins of the tubers of 17 varieties of purple sweet potatoes, also pigmental components of the 4 varieties were analyzed.
分析了17个紫甘薯品种块根的颜色、总花色甙含量和4个品种的组分。
Using rutin as the standard sample, total flavonoid content in purple sweet potato for food packaging paper dying was determined by Vis-and UV-spectrophotometry.
以芦丁为标准样品，比较了可见光及紫外光分光光度法测定食品包装纸用色素紫甘薯总黄酮的方法。
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