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首页> 外文期刊>American Journal of Analytical Chemistry >Determination of Saponification Value in Carnuba Wax by USP/NF Residual Titration Method &541&
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Determination of Saponification Value in Carnuba Wax by USP/NF Residual Titration Method &541&

机译：通过USP / NF残留滴定法＆ 541＆确定巴西棕榈蜡中的皂化值。

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摘要

Saponification value is defined as mg KOH needed to neutralize free acids and saponify esters in 1 g of the test substance. A search of the literature showed that the standard saponification methods of the U.S. Pharmacopeia, alcoholic potassium hydroxide were the only saponification reagent. The sample to investigate is saponified with an excess of ethanolic potassium hydroxide solution. After finished saponification the remaining excess of potassium hydroxide is determined by residual titration under Titrimetry , with aqueous volumetric hydrochloric acid. In this study, a test for saponification value has been successfully determined in carnuba wax. The average result has been found 90.9 mg KOH/g substance and, % RPD was 1.65%. This is in contradistinction to the U.S. Pharmacopeia/National Formulary (USP/ NF) Method.
机译：皂化值定义为中和1 g测试物质中的游离酸和皂化酯所需的mg KOH。文献检索表明，美国药典的标准皂化方法是醇性氢氧化钾，是唯一的皂化剂。将要研究的样品用过量的乙醇氢氧化钾溶液皂化。皂化完成后，通过残留滴定法在滴定法下用含水盐酸水溶液测定剩余的过量氢氧化钾。在这项研究中，已经成功地确定了巴西棕榈蜡中的皂化值测试。发现平均结果为90.9 mg KOH / g物质，％RPD为1.65％。这与美国药典/国家处方（USP / NF）方法不同。

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