Abad-Peña Elizabet, Larrea-Marín María Teresa, Villanueva-Tagle Margarita Edelia, Pomares-Alfonso Mario Simeón
Department of Chemistry, Faculty of Natural Sciences, University of Oriente, Avenida Patricio Lumumba s/n, CP 90500, Santiago de Cuba, Cuba.
National Center of Metallurgical Researches (CENIM, CSIC), Avenida Gregorio del Amo, 8, 28040 Madrid, Spain.
Talanta. 2014 Jun;124:79-88. doi: 10.1016/j.talanta.2014.01.066. Epub 2014 Feb 11.
An inductively coupled plasma optical emission spectrometry method for the quantitative simultaneous determination of Al, Ca, Co, Cu, Cr, Fe, K, Mg, Mn, Na, Ni, P and Zn in Cuban laterite and serpentine minerals has been developed. Additionally, V and Ti can be quantitatively determined in laterite mineral; Li, Sr, and Zr can be detected in both mineral types and Pb can be detected just in laterite mineral. The microwave-assisted total acid digestion of samples was achieved with HCl+HNO3+HF and HNO3+HClO4+HF acid mixtures for laterite and serpentine samples, respectively. In non-robust plasma operating conditions, the matrix effect characteristics of the laterite sample were dictated by the principal component Fe; while the character of the Mg principal component matrix effect was some how modified by the concomitants Fe and Ni in serpentine sample. The selection of robust conditions decreased the matrix effect. Additionally, the simulation of the matrix samples by introducing the principal component Fe or Mg, correspondingly, in calibration dissolutions was needed to overcome completely the matrix effect over the analysis accuracy. Precision of analysis was very near or lower than 10% for most elements, except Sr (15%) in L-1; and K (15%) and Li (15%) in SNi sample. Accuracy of analysis was around or lowers than 10% for most elements, except K (15%), Na (19%), P (19%) and V (19%) in L-1 sample; and Ca (14%) and P (20%) in SNi sample.
建立了一种电感耦合等离子体发射光谱法，用于同时定量测定古巴红土矿和蛇纹石矿中的铝、钙、钴、铜、铬、铁、钾、镁、锰、钠、镍、磷和锌。此外，红土矿中可定量测定钒和钛；两种矿物类型中均可检测到锂、锶和锆，而铅仅在红土矿中可检测到。分别采用HCl+HNO3+HF和HNO3+HClO4+HF酸混合物对红土矿和蛇纹石矿样品进行微波辅助全酸消解。在非稳健的等离子体操作条件下，红土矿样品的基体效应特征由主要成分铁决定；而蛇纹石矿样品中主要成分镁的基体效应特征在一定程度上被共存的铁和镍所改变。选择稳健的条件可降低基体效应。此外，需要通过在校准溶液中相应地引入主要成分铁或镁来模拟基体样品，以完全克服基体效应对分析准确度的影响。除L-1中的锶（15%）以及SNi样品中的钾（15%）和锂（15%）外，大多数元素的分析精密度非常接近或低于10%。除L-1样品中的钾（15%）、钠（19%）、磷（19%）和钒（19%）以及SNi样品中的钙（14%）和磷（20%）外，大多数元素的分析准确度约为或低于10%。
