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为了确定人工合成的铌酸锂和锗锌锂材料的组成,常常需要准确测定其原料及成品中的锂。关于原子吸收测定高含量锂的报导甚少。Willich等用原子吸收示差法测定了铌酸锂中的锂(5—15%Li_2O)。测定的精密度达到1.1%,并认为显著优于重量法(约4%)。我们进一步研究了原子吸收测定锂时的一些重要实验参数的影响。实验发现锂的发射噪声对吸光度测
In order to determine the composition of artificially synthesized lithium niobate and germanium zinc-zinc materials, it is often necessary to accurately determine the lithium in their raw materials and finished products. Very little is reported about the determination of high levels of lithium by atomic absorption. Willich et al. Determined lithium (5-15% Li 2 O) in lithium niobate by atomic absorption spectroscopy. The precision was measured at 1.1% and was found to be significantly better than the gravimetric method (about 4%). We further investigated the influence of some important experimental parameters in the determination of lithium by atomic absorption. The experiment found that the emission of lithium on the absorbance measurement