Fundamental studies on the determination of nanogram quantities of some metals in natural waters by atomic spectroscopic analysis.

虽然原子光谱法如石墨炉原子吸收光谱法（GF-AAS）或电感耦合等离子体原子发射光谱法（ICP-AES）是最灵敏的分析方法之一，但这些方法的仪器灵敏度低于天然水中元素的水平。相应地，必须采用富集程序。另一方面，我们已经发展了直接分析。粉末样品的AAS使用内微型杯（迷你杯）与杯型石墨炉。因此，认为当使用小杯技术的AAS直接测定应用于通过使用有机络合剂和在灰化步骤中完全灰化的载体离子的复合而获得的共沉淀样品时，分析灵敏度可以增加至少1000倍。我们认为两种螯合剂，即，8-本文介绍了一种用微型内杯和杯式石墨炉固体进样技术测定微量镉、锰、铅等金属元素的原子吸收光谱法。

Although atomic spectrometric method such as graphite furnace atomic absorption spectrometry (GF-AAS) or inductively-coupled plasma stomic emission spectrometry is one of the most sensitive analytical methods, the instrumental sensitivity of these method is less than the level of the element in natural water. Accordingly preconcentration procedures must be applied.On the other hand, we have already developed the direct analysis of. powder samples by AAS using an inner miniature cup (Mini-cup) in conjunction with a cupped type electrothermal graphite furnace. Therefore, it has been considered that the analytical sensitivity may be increased at least 1000-fold when the direct determination by AAS using the mini-cup technique is applied to coprecipitation samples obtained by using a compination of an organic complex agent and a carrier ion which is ashed completely at the ashing step. We have thought that two kinds of chelating agents, i.e., 8-hydroxyquinoline and dimetrylglyoxime, which are typical agents for gravimetric analysis, may be useful.As the result, a new easy, sensitive and accurate atomic absorption spectrometric method using an inner miniature cup in conjunction with a cupped type electrothermal graphite furnace for the solid sampling technique is established for the detarmination of sub-ppb levels of some metals such as Cd, Mn, Pb etc. lake or sea water.