A hybrid method combining discharge-assisted laser induced breakdown spectroscopy with wavelet transform for trace elemental analysis in liquid targets

Abstract

Laser-induced breakdown spectroscopy (LIBS) represents a highly promising detection technology in quantitative determination of trace elements in liquid. However, due to the plasma fast quenching, liquid level instability, and limited...

Improving the Laser-Induced Breakdown Spectroscopy for Highly Efficient Trace Measurement of Hazardous Components in Waste Oils

“…Therefore, the LOD for Ca is ultimately decreased from 1.9 mg/L in SP-LIBS-SWS to 86 μg/L in DA-LIBS-FPS, thereby resulting in a 22-fold improvement in quantitative analytical performance. It was reported that the LODs of Ba and Ca in the liquid targets were located at the level of several ppm for SP-LIBS and at subppm for other enhanced LIBS techniques. ,,, In contrast, compared with the reported detection levels, the LOD in DA-LIBS-FPS is reduced by 1–2 orders of magnitude, as shown in Table .…”

“…It was reported that the LODs of Ba and Ca in the liquid targets were located at the level of several ppm for SP-LIBS and at subppm for other enhanced LIBS techniques. 7,14,21,22 In contrast, compared with the reported detection levels, the LOD in DA-LIBS-FPS is reduced by 1−2 orders of magnitude, as shown in Table 1.…”

“…In our previous work, 14 we introduced DA-LIBS to enhance the detection sensitivity of metal elements in liquid samples, where the samples were coated on a silica wafer. This approach allowed us to achieve LODs for some typical elements, such as Ca, at a several hundreds of ppb level.…”

Atomic spectrometry update: review of advances in atomic spectrometry and related techniques

“…The authors developed the device as a miniaturised, low-cost and low-power consumption instrument. Xu et al 140 developed a hybrid method that combined discharge-assisted LIBS with wavelet transform de-noising, for trace elemental analysis in liquid samples ( e.g. , oil pollutants).…”

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

“…The last paper in this section was by Xu et al and described a hybrid method combining discharge assisted LIBS with wavelet transform for trace elemental analysis in liquid targets . 95 Although LIBS is a highly promising detection technology for the quantitative determination of trace elements in liquids, there are several challenges to overcome. This is because of the fast plasma quenching, liquid level instability and limited laser-energy absorption making rapid real-time quantitative detection of trace elements with high-sensitivity in liquid targets very difficult.…”