长程紫外分光光度法快速鉴别地沟油、煎炸油、火锅红油

Application research on rapid identification of gutter oil,frying oil and hot pot red oil by long-range UV spectrophotometry

目的验证长程紫外分光光度法对不同品质的油脂快速检测和鉴别的效果。方法利用自行研发的快速检测仪器,采用紫外吸光值的测定方法,对苏州市区餐饮单位食品安全监督中采集到的65份煎炸油、37份火锅红油、3份涉嫌非法回收食用油及111份地沟油盲样进行快速检测和分析,并与实验室检测结果进行比对。结果该方法能有效地检测地沟油、煎炸油、火锅红油,在盲样考核中准确率达79.28%,检测混合油品时假阴性率较高。结论该仪器能适用于基层食品安全监管部门开展食用油粗筛。

Objective To verify the effect of long-range UV spectrophotometry in detection and identification of oils of different quality. Methods Rapid detection equipment was developed and ultraviolet absorption method was used for the detection. Samples were collected during food safety supervision in Suzhou, including 65 frying oil, 37 hot pot red oil, 3 suspected recycled cooking oil from catering units and 111 gutter oil blind samples. All samples were subjected to rapid detection and analysis, and compared with laboratory test results. Results The method could effectively detect gutter oil, frying oil and hot pot red oil, and the rate of accuracy was up to 79.28% in the blind sample test. Conclusion The instrument could be applied in food safety supervision at the local level for edible oil.