摘要
铝土矿中主次量组分的准确测定对其资源综合利用具有重要意义。熔融制样-X射线荧光光谱法已广泛应用于铝土矿中主次量组分的测定中。而马达加斯加红土型铝土矿基体与常用的铝土矿标准物质有很大的不同,现有的标准物质不能满足该类型铝土矿主次量组分的测定需要。将部分铝土矿标准物质分别与锆矿石标准物质、氧化铁基准物质混合,制成校准样片,加入校准系列,扩大了氧化锆和氧化铁的测定范围,建立了熔融制样-波长色散X射线荧光光谱法测定马达加斯加红土型铝土矿中主次量元素的方法。对该样品的熔融方法进行了研究,对基体干扰的校正进行了探索,实现了对铝土矿中SiO_(2)、Al_(2)O_(3)、Fe_(2)O_(3)、TiO_(2)、CaO、MgO、K_(2)O、Na_(2)O、MnO、P_(2)O_(5)、ZrO_(2)、Ga_(2)O_(3)、V_(2)O_(5)、Cr_(2)O_(3)共14种组分的快速准确测定。将实验方法应用于其他铝土矿标准物质中主次量组分的测定,结果的相对误差(RE)为-8.64%~8.33%,相对标准偏差(RSD,n=12)不大于9.2%。采用实验方法对马达加斯加红土型铝土矿样品进行测定,测定结果的相对标准偏差(n=6)不大于7.4%,测定值和其他分析方法的结果进行了比对,结果一致。
The determination of major and minor components in laterite-type bauxite is of great significance for the utilization of bauxite ores.X-ray fluorescence spectrometry(XRF) with fusion sample preparation has been applied for the determination of major and minor components in bauxite.However,Malagasy laterite bauxite has higher levels of iron(Ⅲ) oxide,silicon dioxide and zirconia.The existing standard materials can hardly meet the requirements.To establish a rapid and accurate method for the analysis of major and minor components in laterite-type bauxite,this study mixed zirconium ore reference material(GBW07157),ferric oxide reference material and the bauxite standard materials to make calibration samples,and expanded the determination rang of iron(Ⅲ) oxide and zirconia.The melting method of the sample was investigated and the correction of matrix interference was explored.The proposed method was applied for the determination of major and minor components in certified reference materials of bauxite.The relative errors(RE) of results were between-8.64% and 8.33%.The relative standard deviations(RSD,n=12) were less than 9.2%.The laterite-type bauxite samples from Madagascar were determined according to the experimental method,and the RSD of results were less than 7.4%.The proposed method satisfies the determination of Malagasy laterite-type bauxite,and provides the results of 14 major and minor components.
作者
杜天军
乔丽君
赵亚男
赵华
田彩芳
DU Tianjun;QIAO Lijun;ZHAO Ya′nan;ZHAO Hua;TIAN Caifang(Henan Academy of Geology,Zhengzhou,Henan 450052,China;Key Laboratory of Deep Ore-prospecting Technology Research for Non-ferrous Metals of Henan Province,Zhengzhou,Henan 450052,China)
出处
《中国无机分析化学》
CAS
北大核心
2023年第10期1083-1089,共7页
Chinese Journal of Inorganic Analytical Chemistry
基金
河南省2016年度“两权价款”地质科研项目(2015199203)。
关键词
熔融制样
红土型铝土矿
主次量组分
X射线荧光光谱法
fusion sample preparation
laterite-type bauxite
major and minor components
X-ray fluorescence spectrometry
