方法运用超声技术提取沙枣中的鞣质，用络合滴定法测定其含量。
Methods tannin was extracted by the ultrasonic technology and content of tannin was determined by the method of complex titration.
用甲醇对油样中l -抗坏血酸棕榈酸酯进行提取，对提取物在酸性条件下水解，用水解产物对2,6 -二氯酚靛酚钠溶液进行滴定。
L-ascorbyl palmitate in the methanol extract is hydrolyzed under acid condition, and 2, 6-dichlorophenol indophenol sodium solution is titrated with the hydrolysate.
方法：采用正交实验法对老鹳草总鞣质的提取工艺进行优选，以总鞣质含量为指标，用EDTA络合法滴定。
The content of total tannin was chosen as the assessment index, and the EDTA complexometric titration was used for the measurement.
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