CAJ | 학술논문

油脂与韦氏液发生加成反应后，加入碘化钾溶液，析出的碘以50%冰醋酸的水溶液作参比，在630 nm处测定碘吸光度值Ae，同时作空白，测定其A0，间接找到油脂消耗氯化碘的量，其消耗的量与油脂碘值成正比，由此可以计算出油脂的碘值。结果表明，与韦氏法比较，结果基本相同，相对误差小于2%。
유지여위씨액발생가성반응후，가입전화갑용액，석출적전이50%빙작산적수용액작삼비，재630 nm처측정전흡광도치Ae，동시작공백，측정기A0，간접조도유지소모록화전적량，기소모적량여유지전치성정비，유차가이계산출유지적전치。결과표명，여위씨법비교，결과기본상동，상대오차소우2%。
After completion of addition reaction between oil and Wijs solution,potassium iodide was added into the solution. The 50%acetic acid aqueous solution was set as reference to the yield iodine, then the absorbance values Ac of iodide was measured at the point of 630 nm. Meanwhile,the value A0 was evaluated through reagent blank. The consumption of oil reacted with iodine chloride was indirectly determined. The results indicate that the consumption of oil was proportional to the amount of oil IV, the oil IV was then determined. The outcomes also show that the value was approximately the same as that measure by Wij’s method. The relative error was less than 2%by visible spectrometry.