植物油不溶性杂质含量测定方法的改进  

Soxtec system applied in the determination of the content of vegetable oil insoluble impurities

作　　者：张春娥 张蕊[2] 张丽 

机构地区：[1]宁夏粮油产品质量检测中心,宁夏银川750001 [2]国家粮食局科学研究院,北京100037

出　　处：《粮油食品科技》2014年第4期61-62,共2页Science and Technology of Cereals,Oils and Foods

摘　　要：针对现有国标GB/T 15688—2008方法在测定植物油不溶性杂质含量时,滤纸表面油渍洗涤步骤耗时长,测定效率低的缺点,研究用Soxtec索氏浸提装置的淋洗方式替代国标规定的滤纸表面油渍冲洗方法,并对两种方法进行比较。结果表明:采用Soxtec淋洗方式结果准确,与标准方法相比,连续处理6个样品可节省操作时间至少5 h,且具有重现性好,节约试剂和减少试剂污染等优点。对于未经脱色的深色油脂,Soxtec淋洗也能充分洗掉滤纸上残留的色素。因此,同时分析多个油脂样品不溶性杂质含量时,采用Soxtec索氏浸提装置淋洗方式效率更高。In order to improve the efficiency of determination of insoluble impurities content, and to save washing time of oil splotch on the surface of filter paper, Soxtec Soxlet leaching apparatus was researched to substitute the method of washing splotch on the filter paper surface prescribed in GB/T 15688 - 2008, and the results obtained with the two different methods were compared. The result showed that the result from Soxtec leaching test was precise and had good reproducibility, and at least 5 h shorter with continuous treat- ment of 6 samples, less reagents amount and pollution. For dark grease without decoloration, the pigment on filter paper can be washed off completely by Soxtec leaching. Therefore, Soxtec Soxhlet leaching apparatus will achieve the higher efficiency when analyzing the content of insoluble impurities in several oil samples.

关 键 词：植物油 不溶性杂质 索氏抽提装置 

分 类 号：TS227[轻工技术与工程—粮食、油脂及植物蛋白工程]