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首页> 美国卫生研究院文献>International Journal of Analytical Chemistry >Determination of Formaldehyde by HPLC with Stable Precolumn Derivatization in Egyptian Dairy Products
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Determination of Formaldehyde by HPLC with Stable Precolumn Derivatization in Egyptian Dairy Products

机译：稳定乳前柱衍生化高效液相色谱法测定埃及乳制品中的甲醛

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摘要

Formaldehyde is one of the most dangerous chemical compounds affecting the human health; exposure to it from food may occur naturally or by intentional addition. In this study a high performance liquid chromatography method for determination of formaldehyde in dairy products was described. The dairy samples were reacted and extracted with a warmed organic solvent in the presence of derivatizing agent 2,4-dinitrophenylhydrazine (DNPH) and formaldehyde; the mixture was centrifuged and followed by diode array detection. The method is validated and gives average recovery of formaldehyde at the three different levels 0.1, 5.0, and 10.0 mg/kg varied between 89% and 96%. The method is linear from the limit of quantification 0.1 mg/kg up to 10 mg/kg levels. This method is intended for formaldehyde analyses in dairy products simply with stable derivatization, minimum residue loss, excellent recovery, and accurate results with a sensitive limit of detection 0.01 mg/kg. 90 dairy samples from milk, cheese, and yogurt were investigated from seven Egyptian governorates and all samples were free from formaldehyde.
机译：甲醛是影响人体健康的最危险的化学物质之一。从食物中暴露可能是自然的，也可能是有意添加的。在这项研究中，描述了一种高效液相色谱法测定乳制品中的甲醛。使乳制品样品反应，并在衍生剂2,4-二硝基苯肼（DNPH）和甲醛存在下，用温热的有机溶剂萃取；离心混合物，然后检测二极管阵列。该方法得到了验证，并给出了三​​种不同水平的甲醛平均回收率：0.1、5.0和10.0mg / kg，变化范围为89％至96％。该方法是线性的，定量范围从0.1µmg / kg到10µmg / kg。该方法仅用于乳制品中的甲醛分析，具有稳定的衍生作用，最小的残留物损失，优异的回收率和准确的结果，检测极限为0.01 sensitivemg / kg。从七个埃及省份调查了90个来自牛奶，奶酪和酸奶的乳制品样品，所有样品均不含甲醛。

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