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LC-UV Column-Switching for Quantitation of Vitamin K1 in Infant Formula

机译：LC-UV色谱柱切换定量婴儿配方奶粉中的维生素K 1

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摘要

This study was undertaken in order to develop an analytical method for vitamin K1 in infant formula. The content of vitamin K1 was investigated by using a column-switching LC-UV method. A Certified Reference Material sample of infant formula containing 0.94 ± 0.04 mg kg−1 of vitamin K1 was extracted with hexane followed by enzymatic digestion of fat and precipitation of the fatty acids. The linearity of this method was calculated using five consecutive standard curves, and the coefficient of determination (r 2) was found to be 0.9995. The limit of detection (LOD) and the limit of quantitation (LOQ) was 3.31 and 11.12 μg L−1, respectively. The accuracy of intra- and inter-day measurements was in the range from 96.67 to 108.67%, and the precision of intra- and inter-day measurements was less than 5.13%. The recoveries were 109.27 ± 5.92%, and the recoveries of inter-laboratory results were in the range from 97.59 ± 1.29 to 109.27 ± 5.92%. The newly developed method uses the optimum conditions required to determine the content of vitamin K1 in infant formula.
机译：进行这项研究是为了开发婴儿配方食品中维生素K 1 的分析方法。采用柱切换LC-UV法研究了维生素K 1 的含量。用己烷提取含有0.94±0.04 mg kg -1 维生素K 1 的婴儿配方奶粉的标准参考物质样品，然后通过酶促消化脂肪和沉淀脂肪酸。使用五个连续的标准曲线计算该方法的线性，测定系数（r 2 ）为0.9995。检测限（LOD）和定量限（LOQ）分别为3.31和11.12μgL -1 。日内和日间测量的准确性在96.67至108.67％的范围内，日内和日间测量的准确性小于5.13％。回收率为109.27±5.92％，实验室间结果的回收率为97.59±1.29至109.27±5.92％。新开发的方法使用确定婴儿配方食品中维生素K 1 含量所需的最佳条件。

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