Production of Bauxite Certified Reference Material (BARC‐B1201) for Nine Property Values (Al₂O₃, Fe₂O₃, SiO₂, TiO₂, V₂O_5,MnO, Cr₂O₃, MgO and LOI) Traceable to SI Units

Abstract

The National Centre for Compositional Characterisation of Materials (NCCCM) / Bhabha Atomic Research Centre (BARC) and National Aluminium Company Limited (NALCO), India have produced an Indian origin bauxite certified reference material (CRM), referred to as BARC‐B1201, certified for major (Al2O3, Fe2O3, SiO2, TiO2, loss on ignition ‐ LOI) and trace contents (V2O5, MnO, Cr2O3, MgO). Characterisation was undertaken by strict adherence to ISO Guides. A method previously developed and validated in our laboratory, using single step bauxite dissolution and subsequent quantitation (of Al2O3, Fe2O3, SiO2, TiO2, V2O5, MnO, Cr2O3 and MgO) by ICP‐AES (SSBD ICP‐AES) was used for homogeneity studies and an inter‐laboratory comparison exercise (ILCE) of the candidate CRM. LOI was determined by thermo‐gravimetric analysis. Property values were assigned after an ILCE with participation from seventeen reputed government and private sector laboratories in India. The CRM was certified for nine property values: Al2O3, Fe2O3, SiO2, TiO2, V2O5, MnO, Cr2O3, MgO and LOI, which are traceable to SI units.

Atomic spectrometry update – a review of advances in environmental analysis

“…Recommended values for major oxides (Al 2 O 3 , Cr 2 O 3 , FeO and MgO) and trace elements (Co, Ga, Mn, Ni, Sc, Ti, V and Zn) were derived from solution ICP-MS data and the homogeneities of the major and trace elements were checked by EPMA and LA-ICP-MS, respectively. Prasad et al 185 described the production of a bauxite CRM (BARC-B1201) and its certification for 8 major and minor elements and loss on ignition (LOI) following an inter-laboratory comparison exercise involving 17 laboratories in India.…”