Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Arany Janos 11, 400028 Cluj-Napoca, Romania.
Food Chem. 2012 Oct 15;134(4):2447-52. doi: 10.1016/j.foodchem.2012.04.044. Epub 2012 Apr 17.
A method for multielemental (Ca, Cr, Cu, Fe, K, Mg, Mn, Na, P and Zn) determination in multimineral/multivitamins by atomic emission spectrometry in a medium power radiofrequency capacitively coupled plasma (275 W) and low Ar consumption (0.4 L min(-1)) is proposed. Determinations were performed on commercially available tablets and a standard reference material after acidic high-pressure microwave assisted digestion and using the standard additions procedure. The detection limits (mg g(-1)) were in the range 0.003 (Na)-1.5 (P) and were not depreciated by the non-spectral interference of mineral matrices of K, Ca, Mg and Na excepting Zn and P. Found concentrations corresponded generally to the labelled contents with recovery in the range of 90-107% and 1.0-13.0% repeatability. The proposed technique could be an advantageous alternative to the more expensive inductively coupled plasma atomic emission spectrometry in the quality control of multimineral/multivitamin preparations.
本文提出了一种在中功率射频电容耦合等离子体（275 W）和低 Ar 消耗（0.4 L min(-1)) 条件下，通过原子发射光谱法同时测定多种矿物质/多种维生素中 Ca、Cr、Cu、Fe、K、Mg、Mn、Na、P 和 Zn 等多种元素的方法。采用酸性高压微波辅助消解后，采用标准加入法，对市售片剂和标准参考物质进行了测定。检测限（mg g(-1)) 范围为 0.003（Na）-1.5（P），除 Zn 和 P 外，矿物质基质 K、Ca、Mg 和 Na 的非光谱干扰并不降低检测限。发现的浓度通常与标签含量相对应，回收率在 90-107%之间，重复性为 1.0-13.0%。与更昂贵的电感耦合等离子体原子发射光谱法相比，该技术可能是矿物质/多种维生素制剂质量控制的有利替代方法。
