过氧化氢法测定魔芋凝胶食品中二氧化钛的研究  

Study on determination of titanium dioxide in konjac products by hydrogen peroxide method

作　　者：薄晓菲[1] 王洪伟[1] 李佳[1] 张盛林[2] 

机构地区：[1]西南大学食品科学学院,重庆400716 [2]西南大学园艺园林学院,重庆400716

出　　处：《食品工业科技》2010年第3期357-359,共3页Science and Technology of Food Industry

基　　金：国家科技支撑项目(2007BAD73B04)

摘　　要：建立过氧化氢法测定魔芋凝胶食品中二氧化钛含量的检测方法。样品经硫酸—硝酸—硝酸铵消化完全后,以过氧化氢作为显色剂,在410nm波长下测定吸光度,二氧化钛含量和吸光度呈正比例关系。结果表明,该方法平均回收率为102.76%,相对标准偏差为1.55%。该方法重复性好,准确度高,操作简单。The method of determination of titanium dioxide in konjac products by hydrogen peroxide process was established.The sample was completely digested by sulfuric acid-nitric acid- ammonium nitrate.It was determinated with hydrogen peroxide as a reagent at 410nm wavelength.The content of titanium dioxide and absorbance was direct proportion relationship.The results showed that the average recovery of the method was 102.76%, relative standard deviation was 1.55% .This method was reproducible, high accurate and easy for operation.

关 键 词：魔芋凝胶食品 二氧化钛 过氧化氢 二安替比林甲烷 

分 类 号：TS207.3[轻工技术与工程—食品科学]