摘要
采用硝酸活化后的碳纳米管吸附柱来富集饮用水中的镉,用火焰原子吸收光谱法测定洗脱液中的镉。对碳纳米管吸附与洗脱镉的有关实验条件进行了详细的研究与优化,确定了碳纳米管富集饮用水中镉的最佳条件。实验结果表明,用0.50mol/LHNO3活化的碳纳米管吸附柱能定量吸附饮用水中的镉,并用0.50mol/LHNO3能完全洗脱碳纳米管所吸附的镉。本法的加标回收率为102.1%～106.4%,结果准确可靠,可应用于实际水样中微量镉的测定。
Cadmium in drinking water was enriched by adsorption column packed with nitric acid active carbon nanotubes and the content of cadmium in eluent was measured by flame atomic Absorption spectrometry.Experimental conditions related to the adsorption ability of carbon nanotubes and the elution of cadmium was optimized and the optimal conditions for the enrichment of cadmium in drinking water with carbon nanotubes were finally established.Experimental results indicated that carbon nanotubes active by 0.50mol/L HNO3 could adsorb quantitatively cadmium in drinking water and the adsorbed cadmium could be totally eluted by 0.50mol/L HNO3.Spiked recoveries of this method ranged from 102.1% to 106.4% demonstrated the accuracy and reliability of the test results.The proposed method could be applied to determine trace cadmium in real water samples.
出处
《食品工业科技》
CAS
CSCD
北大核心
2011年第6期401-403,406,共4页
Science and Technology of Food Industry
基金
浙江省分析测试科技计划项目(2009F7002)
关键词
碳纳米管
富集
镉
原子吸收光谱法
carbon nanotubes
preconcentration
cadmium
flame atomic Absorption spectrometry
