岩矿测试2018，Vol.37Issue(1)：30-35,6.DOI:10.15898/j.cnki.11-2131/td.201704240065
过氧化钠碱熔-电感耦合等离子体发射光谱法测定钛铝合金中的铬铁钼硅
Determination of Chromium,Iron,Molybdenum and Silicon in Ti-Al Alloy by Inductively Coupled Plasma-Optical Emission Spectrometry with Sodium Peroxide Alkali Fusion
摘要
Abstract
Single acid cannot completely dissolve Ti-Al alloy with high Ti content when determining chromium, iron,molybdenum and silicon by Inductively Coupled Plasma-Optical Emission Spectrometry(ICP-OES).A small amount of impurity remains after dissolving the samples by mixed acid.Furthermore,the precipitation occurs readily during re-dissolution,even if using concentrated aqua regia.In this study,the Ti-Al alloys were fused with sodium peroxide for 20 min at 700℃ and were acidified by hydrochloric acid.The method for the determination of chromium,iron,molybdenum and silicon in Ti-Al alloy by ICP-OES was established.The interference from the titanium matrix in samples was improved by the titanium matrix matching method when the concentration of titanium was greater than 200 μg/mL.Additionally,the amount of salt content in solution was controlled by sodium peroxide to ensure the stability of determination.The detection limits and lower determination limits are 0.02-0.05 μg/mL and 0.07-0.17 μg/mL,respectively.The method has been verified by analyzing the national standard material (GBW02501).The relative standard deviations(RSDs)are 0.90%-4.89%,the relative errors are 1.2%-3.6% and the recoveries are 91.6%-103.8%.Compared with acid solution,the dissolution of the samples is complete using the proposed method.Moreover,the method is accurate,reliable,and suitable for multi-element determination of Ti-Al alloy with high titanium content.关键词
钛铝合金/钛基体干扰/过氧化钠碱熔/电感耦合等离子体发射光谱法Key words
Ti-Al alloy/interference from titanium matrix/sodium peroxide fusion/Inductively Coupled Plasma-Optical Emission Spectrometry分类
化学化工引用本文复制引用
黄超冠,蒙义舒,郭焕花,林凌宇,杨春涛..过氧化钠碱熔-电感耦合等离子体发射光谱法测定钛铝合金中的铬铁钼硅[J].岩矿测试,2018,37(1):30-35,6.基金项目
广西科技基地和人才专项(桂科AD16450041) （桂科AD16450041）
