高压密闭消解ICP-AES法测定石墨矿中多元素的含量  

DETERMINATION OF MULTI-ELEMENT CONTENT IN GRAPHITE DEPOSITS BY HIGH-PRESSURE SEALED DIGESTION ICP-AES METHOD

作　　者：李玲娜 苏凌云 王晓星 谭伟 LI Ling-na;SU Ling-yun;WANG Xiao-xing;TAN Wei(No.209 Geological Brigade of Yunnan Nuclear Industry,Kunming 650000)

机构地区：[1]云南省核工业二〇九地质大队,云南昆明650000

出　　处：《云南地质》2025年第1期162-166,共5页Yunnan Geology

摘　　要：快速准确测定石墨矿中多元素含量对石墨矿选冶具有重要的指导意义。实验采用硝酸-氢氟酸酸溶体系,在190℃时采用高压密闭消解石墨矿样品,使样品完全消解;以K766.490nm、Na589.592nm、Al396.152nm、Ca422.673nm、Mg285.213nm、Fe259.940nm、Ti323.452nm、Mn257.610nm、P213.618nm作为分析线,建立电感耦合等离子体原子发射光谱法(ICP-AES)测定石墨矿中多元素含量的方法。结果表明:标准曲线线性关系良好,相关系数均大于0.9994。用国家标准物质进行验证,方法精密度(RSD,n=12)0.39%~4.44%,相对误差(RE,n=12)在-2.98%~2.80%;实际样品的测定结果与传统方法一致,方法适合大批量、多成分分析。A method for determining multi-element content in graphite deposits was established using ICP-AES after high-pressure sealed digestion of samples by HNO_(3)-HF acid system at 190°C.Standard curves exhibited good linearity(correlation coefficients>0.9994).Validation with certified reference materials showed good precision(RSD:0.39%-4.44%,n=12)and accuracy(relative error:-2.98%-2.80%,n=12),consistent with traditional methods,proving suitability for large-scale multi-component analysis.

关 键 词：石墨矿 多元素检测 高压密闭 电感耦合等离子体发射光谱法 云南牟定 

分 类 号：O657.31[理学—分析化学]