The sensitivity of detection of trace heavy metal elements in water samples by inductively coupled plasma (ICP) spectrometry has been improved applying a 10.6 μm infrared laser to irradiate the aqueous solution. With optimal laser power density and irradiation time, the surface tension and viscosity of the aqueous solution were reduced by 38.09 and 11.35%, respectively. The nebulization efficiency of the processed solution in ICP was increased by 47.14%. The spectral intensity and signal-to-noise ratio (SNR) of the trace heavy metal elements including As, Cd, Cr, Cu, Hg, and Pb in the treated aqueous solution were both increased. Our experiment demonstrated that irradiation using an infrared laser at 10.6 μm is a simple and effective method to improve the detection sensitivity of ICP spectrometry for trace heavy metal elements.
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Abstract of article is published in Zhurnal Prikladnoi Spektroskopii, Vol. 82, No. 6, p. 967, November–December, 2015.
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Su, H., Xu, L., Chen, J. et al. Laser Irradiation of Aqueous Solutions for Application in Inductively Coupled Plasma Spectrometry. J Appl Spectrosc 82, 1046–1051 (2016). https://doi.org/10.1007/s10812-016-0227-z
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DOI: https://doi.org/10.1007/s10812-016-0227-z