使用便携式浊度计测定油脂透明度的方法研究  

Determination of oil transparency using portable turbidimeter

作　　者：曾小坪 祝婷婷 苏沛 曾裕 ZENG Xiaoping;ZHU Tingting;SU Pei;ZENG Yu(Sinograin Oils &Fats Industrial Dongguan Co.,Ltd.,Dongguan 523147,Guangdong,China)

机构地区：[1]中储粮油脂工业东莞有限公司,广东东莞523147

出　　处：《中国油脂》2018年第12期149-151,共3页China Oils and Fats

摘　　要：在油脂冷冻试验观察时,结果一般用"澄清""析出""发朦"等术语来表达,依赖人的主观性,重复性和再现性不佳。建立了一种利用浊度计读取常温或低温下油脂不同状态的浊度值,对油脂透明度进行量化分析的方法。采用色泽接近的样品,并且避免样品在有气泡的情况下测定浊度值。结果表明:常温下,棕榈油浊度值越大,样品外观越浑浊;低温下,棕榈油及含棕榈油调和油浊度值随时间的延长逐渐增加,同时出现析出、发朦、浑浊等现象。该方法简便、检测时间短、结果可靠,可有效减少人员主观判断差异,效果良好。When observing oil freezing test,the results generally use such as ‘clarification'‘precipitation'‘haze'terms to express,which depends on the person's subjectivity and has poor repeatability and reproducibility.A method of quantitative analysis of oil transparency through determination of turbidity value in different oil states in oil freezing test by turbidimeter was established.Using samples with similar color and avoiding samples bubbling,the turbidity value was determined.The results showed that at normal temperature,the greater the turbidity value of palm oil,the more turbidity sample appearance.At low temperature,the turbidity values of palm oil and blend oil containing palm oil increased with time prolonging,at the same time,phenomenon of precipitation,haze and turbidity occurred.The method had advantages of simple,short detection time and reliable result,which could effectively reduce the subjective judgment difference,and had a good effect.

关 键 词：油脂 结晶 冷冻试验 浊度计 透明度 

分 类 号：TS227[轻工技术与工程—粮食、油脂及植物蛋白工程] TQ646[轻工技术与工程—食品科学与工程]