摘要
利用氢氟酸-硝酸体系溶解钛白粉样品,以磷酸二氢铵为基体改进剂,用石墨炉原子吸收分光光度法测定钛白粉中有害金属元素铅含量。结果显示,该方法的检出限为0.79ng/ml,加标回收率为97.0%～103.0%,相对标准偏差2.6%～5.2%。该方法用于钛白粉中微量铅的测定,简便快捷,效果理想。
A method has been developed for the determination of micro lead in titanium dioxide by graphite furnace atomic absorption spectrometry（GF-AAS）.Titanium dioxide was completely dissolved by HF-HNO3 and determined with ammonium dihydrogen phosphate as matrix modifier.The detection limit was 0.79 ng/ml.The recoveries for spiking samples were 97.0 %～103.0% with the relative standard deviation of 2.6%～5.2%.The proposed method has been applied in the analysis of titanium dioxide and the results are ideal.
出处
《广西科学院学报》
2010年第3期289-290,294,共3页
Journal of Guangxi Academy of Sciences
关键词
石墨炉原子吸收
铅
钛白粉
磷酸二氢铵
GF-AAS
lead
titanium dioxide
ammonium dihydrogen phosphate
