Kaminski J, Atwal A S, Mahadevan S
Agriculture Canada, Research Branch, Centre for Food and Animal Research, Ottawa, ON.
J AOAC Int. 1993 Sep-Oct;76(5):1010-3.
A quantitative method is described for the determination of formaldehyde (CH2O) in milk by liquid chromatography. Aldehyde derivatization-extraction was carried out in situ with 2,4-dinitrophenylhydrazine in 2-phase reaction medium. Average recovery of added CH2O (0.1 microgram/mL) was 89.9 +/- 3.9% with an estimated detection limit of 0.009 mg/kg. The technique was used for the determination of CH2O in commercial 2% milk and in fresh milk of cows fed on a typical North American dairy diet. The average concentrations of CH2O in fresh and commercial milk were 0.027 and 0.164 mg/kg, respectively. Several methods for CH2O determination in milk are compared.
描述了一种通过液相色谱法测定牛奶中甲醛（CH₂O）的定量方法。在两相反应介质中，用2,4-二硝基苯肼原位进行醛衍生化萃取。添加的CH₂O（0.1微克/毫升）的平均回收率为89.9±3.9%，估计检测限为0.009毫克/千克。该技术用于测定市售2%牛奶和以典型北美奶牛日粮喂养的奶牛的新鲜牛奶中的CH₂O。新鲜牛奶和市售牛奶中CH₂O的平均浓度分别为0.027毫克/千克和0.164毫克/千克。比较了几种测定牛奶中CH₂O的方法。
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