正丁醇常数法快速测定煎炸油脂中羰基价

Rapid determination of carbonyl value in frying oils by 1-butanol constant method

中文关键词:  常数换算  正丁醇  羰基价  煎炸油

英文关键词:conversion constant  1-butanol  carbonyl value  frying oils

中文摘要:

      目的 利用正丁醇常数法快速测定煎炸油脂中羰基价。方法 采用正丁醇为提取溶剂对煎炸油脂进行羰基价测定, 用比色法测得吸光度值, 通过吸光度常数直接算出羰基价。结果 正丁醇常数法比现有国标方法更安全、简便, 方法添加回收率为88%~127%, 相对标准偏差为1.92%~9.82%。结论 该法快速、简便、精密度和准确度高, 适用于煎炸油脂中羰基价的测定。

英文摘要:

      Objective To determine carbonyl value in frying oils quickly and safely. Method A 1-butanol constant method was developed, 1-butanol was used as solvent to replace benzene, converted colorimetric absorbance into carbonyl value directly by measuring constant formula. Results The recovery rates of carbonyl compound were 88% to 127%, and the relative standard deviation were 1.92% to 9.82%. Conclu-sion Compared with the national standard method, this method which is suitable for the determination of carbonyl value in frying oils, is rapid, simple, precise and accurate.