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首页> 外文期刊>Analytical chemistry >An Electrothermal Atomic Absorption Spectrometer Using Semiconductor Diode Lasers and a Tungsten Coil Atomizer: Design and First Applications <页码215a>=p.3525-3532
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An Electrothermal Atomic Absorption Spectrometer Using Semiconductor Diode Lasers and a Tungsten Coil Atomizer: Design and First Applications <页码215a>=p.3525-3532

机译：使用半导体二极管激光器和钨丝雾化器的电热原子吸收光谱仪：设计和首次应用<页码215a> = p.3525-3532

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摘要

A new type of atomic absorption spectrometer using a laser diode as light source and a tungsten coil as atomizer is described. Compared to established atomic absorption spectrometers, it is much simpler in construction, smaller in size, and less expensive and it provides inherent background correction and high detection power. The performance of this concept is demonstrated by the determination of aluminum and chromium in water, blood serim and, using the slurry sampling technique, in powdered high-purity graphite and titanium dioxide samples. For calibration, the standard addition method was used. Possible interferences by impurities originating from the tungsten coils are discussed. Applying aqueous solutions of A1 and Cr, detection limits of 0.9 and 0.03 ng/mL, respectively, were obtained, and for serum they were 2.5 and 0.3 ng/mL, respectively. For these elements in graphite and titanium dioxide applied as slurry, the detection limits are between 0.02 (Cr in TiO↓(2) and 0.6 #g/g (Al in graphite). The accuracy was checked by comparison of the results with those of other methods. The described system is especially suitable for on-site and on-line analysis.
机译：描述了一种新型的原子吸收光谱仪，其使用激光二极管作为光源并且使用钨线圈作为雾化器。与已建立的原子吸收光谱仪相比，它的结构更简单，尺寸更小，成本更低，并且具有固有的背景校正和高检测能力。通过测定水，血丝中的铝和铬，以及使用浆液采样技术，对粉末状高纯石墨和二氧化钛样品中的铝和铬进行测定，证明了这一概念的有效性。为了进行校准，使用了标准添加方法。讨论了来自钨线圈的杂质可能产生的干扰。使用A1和Cr水溶液，检出限分别为0.9和0.03 ng / mL，血清的检出限分别为2.5和0.3 ng / mL。对于作为浆料的石墨和二氧化钛中的这些元素，检出限在0.02（TiO↓（2）中的Cr和0.6＃g / g（石墨中的Al）之间，并通过比较结果与所描述的系统特别适合于现场和在线分析。

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