Perring L, Andrey D, Basic-Dvorzak M, Blanc J
Department of Quality and Safety Assurance, Nestlé Research Centre, Vers-Chez-les Blanc, CH-1000 Lausanne 26, Switzerland.
J Agric Food Chem. 2005 Jun 15;53(12):4696-700. doi: 10.1021/jf047895+.
A rapid and simple method for the determination of a series of macroelements (sodium, magnesium, phosphorus, chlorine, potassium, and calcium) and trace elements (manganese, iron, and zinc) by wavelength dispersive X-ray fluorescence has been developed and validated for infant cereal matrices. Reference values were obtained by inductively coupled plasma optical emission spectroscopy and by potentiometry. The 88 investigated samples were commercially available products. Pellets of 4 g were prepared under 10 tonnes of pressure. For each sample, 3 pellets were prepared and analyzed. Limits of quantification and repeatabilities were evaluated. Calibrations were established with 43 samples, and method validation was made using a second set of 45 samples. An evaluation of this alternative method was done by comparison with data obtained from the reference methods. The results show the good performances of the alternative method to routine infant cereals analysis.
已经开发出一种通过波长色散X射线荧光法快速、简单地测定一系列常量元素（钠、镁、磷、氯、钾和钙）和微量元素（锰、铁和锌）的方法，并在婴儿谷物基质中进行了验证。参考值通过电感耦合等离子体发射光谱法和电位滴定法获得。所研究的88个样品为市售产品。在10吨压力下制备4克的颗粒。每个样品制备3个颗粒并进行分析。评估了定量限和重复性。用43个样品建立校准曲线，并使用另外45个样品进行方法验证。通过与参考方法获得的数据进行比较，对这种替代方法进行了评估。结果表明，该替代方法在常规婴儿谷物分析中具有良好的性能。
