纳米二氧化钛中硫酸根的离子色谱法测定

来源期刊：冶金分析2011年第5期

论文作者：黎涛 冯自平 陈金发 于亮

文章页码：53 - 55

关键词：纳米二氧化钛； 硫酸根； 离子色谱法； EDTA； 缓冲溶液

Key words：nano-titanium dioxide； sulfate； ion chromatography； EDTA； buffer solution

摘    要：建立了纳米二氧化钛(TiO₂)中硫酸根(SO₄^2-)的离子色谱检测方法。通过研究纳米二氧化钛研磨、静置、加热、超声波等前处理条件,样品的溶解介质和取样量对样品测定值的影响优化了样品的检测条件。色谱条件为:Metrosep A SUPP5(250 cm)阴离子交换柱,Na₂CO₃/NaHCO3淋洗液,流速为1 mL/min,MSM抑制器和电导检测器。研究结果表明:采用10 g/L EDTA溶液和pH10缓冲溶液在常温静置浸提0.01 g纳米TiO₂,然后在Na₂CO₃/NaHCO₃的淋洗液条件下进行抑制分离检测,获得了理想的检测效果。样品的加标回收率为93%～95%,测定结果的相对标准偏差小于3%(n=8)。

Abstract: The determination method of sulfate(SO₄^2-) in nano-titanium dioxide(TiO₂) by ion chromatography had been established.The detection conditions of sample were optimized by investigating the effect of pretreatment conditions(the grinding,placing,heating and ultrasonic of nano-titanium dioxide),dissolution medium and sampling amount on determination.The ion chromatography conditions were as follows: Metrosep A SUPP5(250 cm) anion exchange column,Na₂CO₃/NaHCO₃ solution as leacheate,flow rate of 1 mL/min,MSM suppressor and conductivity detector.The results showed that the satisfactory results were obtained when 0.01g of nano-titanium dioxide was statically extracted with 10 g/L EDTA solution and buffer solution(pH=10) at room temperature,and then detected after inhibitory separation with Na₂CO₃/NaHCO₃ solution.The recoveries of standard addition were 93%-95%,and the relative standard deviation(RSD,n=8) of determination results was less than 3%.