NDLI: Exploration of a 3D nano-channel porous membrane material combined with laser-induced breakdown spectrometry for fast and sensitive heavy metal detection of solution samples

Content Provider	Royal Society of Chemistry (RSC)
Author	Niu, Guanghui Wang, Xu Bian, Fang Duan, Yixiang Shi, Qi Lin, Qingyu Wang, Jie
Copyright Year	2014
Abstract	In this paper, a nano-channel material was combined with laser induced breakdown spectroscopy (LIBS) to achieve sensitive and quick detection of metal ions in liquid samples. A 3D anodic aluminum oxide porous membrane (AAOPM) was selected as a novel substrate for the first time, which showed excellent potential for liquid analysis. It is worth mentioning that the LIBS signal of the target elements in aqueous solution dropped on the 3D AAOPM was increased by up to 19 times in comparison with that on the tablet sample made of aluminium oxide powder. The attractive results are mainly attributed to the peculiar structure of the 3D AAOPM. Firstly, an abundant strong coordination metal–oxygen bond between hydroxyl groups and metal ions existed on the surface of the novel substrate. Secondly, the extremely high aspect ratio of the 3D AAOPM could supply a much larger contact area between the matrix and analytes. Thirdly, the special nano-channel distribution could make efficient coupling of a laser beam with the materials. Finally, the sample pervasion and volatilization could be finished within a very short time because of the micrometer level thickness and porosity of the 3D AAOPM. The calibration curves with linearity ranges (1–100 μg mL−1) and good linearity (R squared better than 0.983 for all of the four target elements) were established, and the limits of detection (LODs) obtained were 0.18 μg mL−1, 0.12 μg mL−1, 0.081 μg mL−1, and 0.11 μg mL−1 for Cu2+, Ag+, Pb2+, and Cr3+, respectively. In real sample analyses, the recoveries of three elements at different concentration levels were all in the range of 92.5–107.4%, with the relative standard deviations of parallel samples around 10.0%. This novel method showed a fast, simple and super sensitive monitoring tool for liquid sample analysis compared with the traditional LIBS method.
Starting Page	2302
Ending Page	2308
Page Count	7
File Format	HTM / HTML PDF
ISSN	02679477
Volume Number	29
Issue Number	12
Journal	Journal of Analytical Atomic Spectrometry
DOI	10.1039/c4ja00220b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	LIBS Laser-induced breakdown spectroscopy Three-dimensional space Aluminium oxide Chemical bond Hydroxide Photolithography Composite material Laser Short Time Microfluidics Porosity
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Analytical Chemistry

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