A Single Step Acid Assisted Microwave Digestion Method for the Complete Dissolution of Bauxite and Quantitation of its Composition (Al2O3, Fe2O3, SiO2, TiO2, Cr2O3, MgO, MnO and V2O5) by ICP-AES

IF 2.7 2区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

Geostandards and Geoanalytical Research Pub Date : 2023-02-05 DOI:10.1111/ggr.12481

Ankam Durga Prasad, Lori Rastogi, Shanmugam Thangavel, Kulamani Dash

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引用次数: 1

Abstract

An acid assisted microwave‐based method for the complete dissolution of bauxite using mixture of H2SO4, H3PO4 and HF acids in a single step was developed for the determination of various analytes (Al2O3, Fe2O3, SiO2, TiO2, Cr2O3, MgO, MnO and V2O5) using ICP‐AES. The method was validated with respect to ruggedness, linearity, trueness, precision, limit of detection (LOD), limit of quantification (LOQ), working range and measurement uncertainties by analysing a bauxite reference material (Alcan BXT‐12) and four certified reference materials (IPT‐131, BXBA‐4, NIST SRM 600, NIST SRM 697). The expanded uncertainties obtained for Al2O3 (40.0%), Fe2O3 (17.0%), SiO2 (20.3%), TiO2 (1.31%), Cr2O3 (0.024%), MgO (0.05), MnO (0.013), and V2O5 (0.60%), were 0.80, 0.40, 0.50, 0.033, 0.0008, 0.002, 0.0007 and 0.002 respectively, which are fit for the intended use to characterise bauxite. The developed method was also evaluated through participation in an interlaboratory comparison exercise organised by the Jawaharlal Nehru Aluminium Research Development and Design Centre (JNARDDC), Nagpur, India, using bauxite sample (BXT‐JNA), with satisfactory z‐scores achieved.

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一步酸辅助微波消解法测定铝土矿的完全溶解及其成分（Al2O3、Fe2O3、SiO2、TiO2、Cr2O3、MgO、MnO和V2O5）的ICP-AES定量

开发了一种基于酸辅助微波的方法，使用H2SO4、H3PO4和HF酸的混合物在一步中完全溶解铝土矿，用于使用ICP-AES测定各种分析物（Al2O3、Fe2O3、SiO2、TiO2、Cr2O3、MgO、MnO和V2O5）。通过分析一种铝土矿标准物质（Alcan BXT-12）和四种认证标准物质（IPT-131、BXBA-4、NIST SRM 600、NIST SRM 697），验证了该方法的耐用性、线性度、真实性、精密度、检测限（LOD）、定量限（LOQ）、工作范围和测量不确定度。Al2O3（40.0%）、Fe2O3（17.0%）、SiO2（20.3%）、TiO2（1.31%）、Cr2O3（0.024%）、MgO（0.05）、MnO（0.013）和V2O5（0.60%）的扩展不确定度分别为0.80、0.40、0.50、0.033、0.0008、0.002、0.0007和0.002，适用于铝土矿的预期用途。还通过参与印度那格浦尔贾瓦哈拉尔·尼赫鲁铝研究开发与设计中心（JNARDDC）组织的实验室间比较活动，使用铝土矿样品（BXT-JNA）对所开发的方法进行了评估，并获得了令人满意的z分数。

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来源期刊

Geostandards and Geoanalytical Research 地学-地球科学综合

CiteScore

7.10

自引率

18.40%

发文量

审稿时长

>12 weeks

期刊介绍： Geostandards & Geoanalytical Research is an international journal dedicated to advancing the science of reference materials, analytical techniques and data quality relevant to the chemical analysis of geological and environmental samples. Papers are accepted for publication following peer review.