Sub-parts-per-quadrillion-level graphite furnace atomic absorption spectrophotometry based on laser wave mixing.
Sub-parts-per-quadrillion-level graphite furnace atomic absorption spectrophotometry based on laser wave mixing.
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DOI：
10.1021/ac0348930
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发表时间：
2004-02
影响因子：
7.4
通讯作者：
Fritz K. Mickadeit;Sandrine Berniolles;Helen Kemp;W. Tong
中科院分区：
文献类型：
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作者：
Fritz K. Mickadeit;Sandrine Berniolles;Helen Kemp;W. Tong
本文提出了一种在普通石墨炉原子化器中进行非线性激光波混频的齐摩尔级亚多普勒高分辨原子吸收光谱法。利用非平面三维混波光学装置在其自身空间产生信号光。使用基于模板的光学对准，信号收集是高效且方便的。石墨炉原子化器提供的优点包括快速方便地引入固体、液体或气体分析物、清洁的原子化环境和最小的背景噪声。利用混合光学方法和石墨炉原子化器的独特性，可以获得优异的光谱分辨率和检测灵敏度。一个初步的浓度检测限为0.07份每quadratrium和初步的质量检测限为0.7银或8 zmol的确定为铷使用紧凑型激光二极管作为激发源。
Nonlinear laser wave mixing in a common graphite furnace atomizer is presented as a zeptomole-level, sub-Doppler, high-resolution atomic absorption spectrophotometric method. A nonplanar three-dimensional wave-mixing optical setup is used to generate the signal beam in its own space. Signal collection is efficient and convenient using a template-based optical alignment. The graphite furnace atomizer offers advantages including fast and convenient introduction of solid, liquid, or gas analytes, clean atomization environment, and minimum background noise. Taking advantage of the unique features of the wave-mixing optical method and those of the graphite furnace atomizer, one can obtain both excellent spectral resolution and detection sensitivity. A preliminary concentration detection limit of 0.07 parts-per-quadrillion and a preliminary mass detection limit of 0.7 ag or 8 zmol are determined for rubidium using a compact laser diode as the excitation source.