【摘要】 <正> 痕量锂在人体内已成为不可缺少的元素,对疾病的控制或临床上的诊断以及对环境、医学及生物的研究都有明显的意义。由于一般分析方法灵敏度不高,对锂的检测比较困难。Ottaway等采用石墨炉原子发射法以标准石墨管测定锂和其它某些元素,检出限比火焰发射法和石墨炉原子吸收法有明显的改善,并应用于纯铜中痕量锂的测定。Matousek等研究了锂的石墨炉原子发射方法,在入口狭缝处使用档光技术降低背景发射,提高了更多还原

【Abstract】 Graphite furnace atomic emission spectroscopy has been used to determine trace levels of Li. The atomization temperature, time and slit width were selected and the instrumental parameters and experimental conditionswere optimized. A comparison is made between standard graphite tubes and pyrolytically coated graphite tubes. It is shown that there is a difference between these types of tubes with regard to the sensitivity and the optimum atomizationtemperature. The atomization mechanism of lithium on both tubes are discussed. The detection limit and relative standard deviation of the determination are 5×10^-13 g and 2.3%, respectively.更多还原