Detection of trace amount of arsenic in groundwater by laser-induced breakdown spectroscopy and adsorption

A critical review of recent progress in analytical laser-induced breakdown spectroscopy

“…The typical approach is not direct liquid analysis, but instead to soak up the water sample using sorbents (e.g. wood or paper) to convert the liquid matrix to a solid one and enhance sensitivity [162,163]. Unfortunately, the limit of detection achieved in these studies is still only in the 0.1-1 ppm range, which may enable the monitoring of wastewater but is not sufficiently low for general environmental monitoring of water quality.…”

Good practices in LIBS analysis: Review and advices

“…At the end, two relevant parameters, namely the limit of detection and the limit of quantification can be calculated in order to describe the lower limits of a quantitative model [74]. In the case of a linear regression described by equation , where describes the values of the LIBS data and the values of concentrations, the definition of the limit of detection the most frequently used is [70,74,80]:…”

“…In this latter case, some figures of merit such as R², S, and the confident limits have to be revisited [74]. Table 3 In a study dedicated to the analysis of arsenic [80], the experimental parameters were optimized in order to get the best signal-to-noise ratio and the As I line at 228.812 nm was normalized by the Al I line at 235.1256 nm since aluminum was considered as internal standard. Then, a calibration curve was built but in a reduced range of concentrations (here 0-50 ppm) in order to avoid any risk nonlinear behavior due to possible saturation effects.…”

Monitoring As and Hg variation in An-Gong-Niu-Huang Wan (AGNH) intermediates in a pilot scale blending process using laser-induced breakdown spectroscopy

“…The emission lines of 228.81 nm (As) and 253.63 nm (Hg) were assigned according to the NIST spectral database and previous works [27][28][29]. From 225 to 260 nm, the two selected emission lines were absolutely isolated with no overlapping peaks (Fig.…”