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微波消解-石墨炉原子吸收光谱法测定钛白粉中钒

Metallurgical Analysis(2014)

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Abstract
以3 mL硫酸-2 mL氢氟酸-2 mL过氧化氢为溶剂,采用4步升温微波消解技术对样品进行消解,设定灰化温度为1 500℃,原子化温度为2 700℃,建立了石墨炉原子吸收光谱法测定钛白粉中钒的分析方法.实验表明:试液中加入10 mL0.5 g/L硝酸镁溶液作为基体改进剂可有效增强待测液的吸光度;方法线性范围为0~50 μg/L,方法检出限为0.01 μg/g.采用方法对钛白粉样品中的钒进行测定,结果与常规湿法消解电感耦合等离子体质谱法一致,相对标准偏差(RSD,n=11)为1.9%~3.2%,回收率为98%~100%.
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Key words
graphite furnace atomic absorption spectrometry,titanium dioxide,vanadium,microwave digestion
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