Citation: WANG Hao-Yu, CHEN Sha, YIN Peng-Kun, LIN Qing-Yu, WANG Xu, DUAN Yi-Xiang. A Novel Laser Ablation Chamber for Microwave Plasma Atomic Emission Spectrometry and Its Application[J]. Chinese Journal of Analytical Chemistry, ;2020, 48(10): 1296-1304. doi: 10.19756/j.issn.0253-3820.201238 shu

A Novel Laser Ablation Chamber for Microwave Plasma Atomic Emission Spectrometry and Its Application

1.
College of Life Sciences, Sichuan University, Chengdu 610065, China;
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School of Mechanical Engineering, Sichuan University, Chengdu 610065, China

Received Date: 27 April 2020
Revised Date: 15 July 2020

Fund Project: This work was supported by the National Major Scientific Instrument and Equipment Special Project (No. 2011YQ030113) and the Chengdu Science and Technology Bureau "Cultural Benefiting Technology R&D Project" (No. 2016-HM01-00337-SF).

Microwave plasma torch atomic emission spectrometry (MPT-AES) is a widely used element detection method. However, MPT-AES requires complex digestion and desolvation treatment when detecting solid samples. After many improvements, a new Z-shaped laser ablation chamber and constructing laser ablation microwave plasma torch atomic emission spectroscopy (LA-MPT-AES) was developed. This method eliminated the complex processing of solid samples. The ablation chamber was sealed with a flat surface of solid sample (>3 mm×2 mm), which did not limit the size of the solid sample. The chamber internal volume was 0.04 cm³, the cleaning time was as low as 0.5 s, and the relative standard deviation (RSD) of the signal when analyzing pure Cu samples was 1.2% (n=11). Under the optimal experimental conditions, 12 elements (Si, Mg, Fe, Al, Mn, Ca, Ba, Sr, Na, Li, K, Rb) in the rock-polyethylene tablet were detected, and the detection limit was 0.00002-362 μg/g, with relative standard deviations of 3.7%-9.1% (n=11). The 10 elements in the 3 igneous rock samples were analyzed, showing good uniformity with the theoretical values, with a relative error of 0.04%-14.32%. The LA-MPT-AES had good stability, and its sensitivity was comparable to laser ablation inductively coupled plasma-atomic emission spectrometry (LA-ICP-AES), and even better for some elements. Otherwise, the cost of using this method was much lower than that of the LA-ICP-AES.
- Ablation chamber,
- Laser ablation sample injection,
- Microwave plasma torch,
- Atomic emission spectrometry
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沈阳化工大学材料科学与工程学院沈阳 110142