Multielemental inductively coupled plasma optical emission spectrometry analysis of nickeliferous minerals

TALANTA

卷:124

Article

Abad-Pena, Elizabet¹  Teresa Larrea-Marin, Maria²  Edelia Villanueva-Tagle, Margarita³  Simeon Pomares-Alfonso, Mario⁴ 

[1] Univ Oriente, Fac Nat Sci, Dept Chem, Santiago De Cuba 90500, Cuba

[2] Natl Ctr Met Res CENIM CSIC, Madrid 28040, Spain

[3] Univ Havana, Fac Chem, Havana 10400, Cuba

[4] Univ Havana, IMRE, Havana 10400, Cuba

关键词: Nickeliferous mineral;    Matrix effect;    ICP OES;    Microwave-assisted digestion;    Robust plasma;    Matrix-matching calibration;   

DOI  :  10.1016/j.talanta.2014.01.066

来源: Elsevier

【 摘 要 】

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. (C) 2014 Elsevier B.V. All rights reserved.

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