摘要
研究了纯化学物质校准-高频燃烧红外吸收法测定钛及钛合金中碳含量的分析方法。对钛及钛合金、校准样品(蔗糖)在高频燃烧红外吸收法测定碳量中所使用的助熔剂进行了条件试验,确定二元助熔剂(0.50g Sn+1.50g Cu)能为钛及钛合金提供最佳释放条件。在钛及钛合金助熔剂(0.50g Sn+1.50g Cu)的基础上,加入0.500g纯铁有助于纯化学物质(蔗糖)中碳的释放,测定结果与加入0.500g纯钛的结果一致。采用不同碳含量的蔗糖标准溶液建立了校准曲线,测定范围为0.004%～0.060%(碳质量分数)。采用该校准曲线测定了10个钛及钛合金标准样品中的碳含量,测定结果与认定值吻合。方法用于实际样品分析,分析结果与重量法一致,相对标准偏差(RSD,n=8)为0.8%～5.1%。
A method for the determination of carbon in titanium and titanium alloy was proposed by pure chemical substance calibration-high frequency combustion infrared absorption method. The con- dition experiment of flux was carried out for the determination of carbon in titanium and titanium alloy and calibration sample （sucrose） by high frequency combustion infrared absorption method. It was found that the binary flux （0.50 g Sn＋1.50 g Cu） could provide optimal release conditions for titani- um and titanium alloy. Based on the flux for titanium and titanium alloy （0.50 g Sn＋1. 50 g Cu）, the addition of 0. 500 g of pure iron was helpful for the release of carbon in pure chemical substance （su- crose） , and the determination results were consistent with that after addition of 0. 500 g of pure tita- nium. The calibration curve was established using sucrose standard solutions with different carbon content. The linear range was 0. 004%-0. 060 % （mass fraction for carbon）. The calibration curve was used to the determination of carbon content in ten certified reference materials of titanium and ti- tanium alloy, and the results were consistent with the certified values. This method was applied to de- termination of actual samples. The results were consistent with those obtained by gravimetric method with relative standard deviation （RSD, n=8） of 0.8 %-5.1%.
出处
《冶金分析》
CAS
CSCD
北大核心
2012年第3期30-34,共5页
Metallurgical Analysis
关键词
蔗糖
高频燃烧红外吸收法
钛
钛合金
碳
sucrose
high frequency combustion infrared absorption method
titanium
titanium alloy
carbon
