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投稿时间:2014-10-13
投稿时间:2014-10-13
中文摘要: 乳由于热损伤而发生美拉德反应,产生羧甲基赖氨酸(CML)。研究显示,CML 与糖尿病、动脉粥样硬化、人体细 胞老化等均呈正相关。本文建立了 HPLC 方法对婴幼儿乳粉中羧甲基赖氨酸的测定方法。样品经预处理,采用高效液相 色谱仪(HPLC)进行测定,色谱柱为 C18 柱,柱温为 35 ℃,流动相为甲醇和醋酸钠缓冲液(pH 6.50,0.048 mol/L)(96 ∶ 4,体 积比),流速为 0.8 mL/min,荧光检测器,激发波长 340 nm,发射波长 455 nm,外标法定量。结果显示,CML 在 0.2 μg/mL~35.0 μg/mL 范围内呈良好线性关系,相关系数(r)为 0.999 1。最低检出浓度为 0.16 μg/mL。选择市售 2 种品牌奶粉进行加 标回收试验,回收率分别为 92 %和 107 %。
中文关键词: HPLC 婴幼儿乳粉 羧甲基赖氨酸(CML)
Abstract:Maillard reaction produced carboxymethyl lysine (CML) when milk had been heat injury. Research showed that positive correlation between CML and diabetes mellitus, atherosclerosis and aging cells of people. This paper established high performance liquid chromatography (HPLC) method for determination of carboxymethyl lysine in infant formula products. After pre -treating the sample was quantified with external standard method used C18 chromatographic column with the temperature 35 ℃ and methanol-Sodium acetate buffer(pH 6.50,0.048 mol/L)(96 ∶ 4,volume ratio)as mobile phase at a flow rate of 0.8 mL/min by FLD detector at 340 nm and 455 nm as excitation and emission wavelength. The result showed that CML had a good linearity in the range of 0.2 μg/mL-35.0 μg/mL, and the correlation coefficient was 0.999 1. The limit concentration of detection was 0.16 μg/mL. The recovery rate were 92 % and 107 % in standard recovery test which choosed two brands of milk powder.
文章编号:201603044 中图分类号: 文献标志码:A
基金项目:辽宁省农业科技攻关计划(2015202013)
作者 | 单位 |
黄娟1,2,杨俊青1,2,陈松润1,2,仇凯3 | 1. 国家青少年食品质量监督检验中心,广东 东莞 520808;2. 中食检测研究院有限公司,广东 东莞 520808;3. 中国食品发酵工业研究院,北京 100027 |
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