Development of High Performace Spectrometry Coupled with On-line Novel Selective Chemical Process.

近年来，原子吸收光谱分析和电感耦合等离子体发射光谱分析等先进的光谱分析方法在痕量元素的测定中得到了广泛的应用。然而，由于灵敏度和选择性的限制，它们仍然无法直接用于材料、环境和生物科学和技术等领域的超痕量分析。最近在流动分析方面的应用使仪器方法的灵敏度和选择性得以提高。在本研究中，在线化学修饰和/或分离技术被证明是非常有用的。我们采取的各种方法如下：(1)低温电热汽化Tl(I)用于加热的石英池-AAS，Al(III)和Zr(Ill)作为8-羟基喹啉络合物，Bi(III)作为甲基铋用于LCP-AES或ICPMS。(2)炉上样品消解系统，采用钨船电热原子发射光谱仪直接测定Cd(II)和Pb(II)。(3)L的VOV平台上快速涂布钨技术及其在电感耦合原子吸收光谱法测定铝合金中镓和铟的应用。(4)抗坏血酸作为化学改进剂的热解条件对金在石墨炉原子吸收光谱分析中挥发的影响。(5)膜固定化酶反应和杂多酸鲁米诺化学发光联用测定三磷酸腺苷。(6)反胶束介导鲁米诺化学发光分别与8-喹啉和乙酰乙酮在线萃取联用测定铁(II)、铁(III)和钒(IV)。

In recent years, advanced spectrometric methods such as atomic absorption spectrometry (AAS) and inductively coupled plasmatomic emission spectrometry (ICP-AES) are most popular for the determination of trace elements. However, sensitivity and selectivity limitations still prevent their direct use for ultra-trace analysis in e.g., material, environmental and biological sciences and technologies. Recent applications for flow analysis enable to enhance the sensitivity and selectivity of the instrumental methods. In this study, on-line in situ chemical modification and/or separation techniques were proved to be extremely useful for this purpose.Various approaches we have undertaken are as follows : (1) Low temperature- electrothermal vaporization (ETV) of T1(I) for heated quartz-cell-AAS, A1(III) and Zr(Ill) as 8-hydroxyquinolinate complexes, and Bi(III) as methyl bismuth for lCP-AES or ICP-MS.(2) On-furnace sample digestion system for the direct determination of Cd(II) and Pb(II) by ICP-AES using tungsten boat furnacesample cuvette technique. (3) A rapid tungusten-coating technique on L'vov platform plate and its application to the determination of Ga and In in aluminum alloys etc. by ETV-AAS.(4) Effects of pyrolysis conditions of ascorbic acid as a chemical modi fier on the vaporization of gold in graphite furnace AAS.(5) Coupling of membrane-immobilized enzyme reaction and heteropoly acidluminol chemiluminescence reaction for the determination of ATP.(6) Reversed micellar mediated luminol chemiluminescence detections of iron(II, III) and V(IV) combined with on-line solvent extraction using 8-quinolinol and acetylacetone, respectively.