Sensitive analysis of fluorine and chlorine elements in water solution using laser-induced breakdown spectroscopy assisted with molecular synthesis

Fast detection of hazardous chlorinated volatile organic compounds via laser-induced breakdown spectroscopy

“…The intensity of CaO is weak at the wavelength of 593.40 nm, and the CaO signal intensity won't fluctuate largely due to the fixed and high concentration of CaCO 3 in the calcite, which can be taken as the fixed background noise. 19 Thus, the CaCl molecule at 593.40 nm was chosen as the analytical signal in this work.…”

“…17,18 But, the intrinsic molecular spectra in VOCs are weak, which can't meet the requirements for high-precision analysis of Cl. 19 In this work, a novel approach is established to achieve a stable, reliable molecular emission of CaCl with high intensity. Calcite is used as the substrate to realize the controllable formation of molecules in LIBS plasma.…”

“…17,18 But, the intrinsic molecular spectra in VOCs are weak, which can't meet the requirements for high-precision analysis of Cl. 19…”

Application of Molecular Emissions in Laser-Induced Breakdown Spectroscopy: A Review

“…The results showed that LoD = 5 ppm, R2 = 0.9933, and RMSECV = 0.0049 wt.%. In water condition [65], LoDs of F and Cl elements detected by CaF and CaCl molecular emissions were 0.38 mg/L and 1.03 mg/L, respectively. In addition, Br and I amounts were studied by molecular emission [66].…”

Nebulization assisted molecular LIBS for sensitive and fast fluorine determination in aqueous solutions

“…14 More recently, Tang et al demonstrated a different methodology based on the drop coating deposition of the liquid sample on a CaCO 3 substrate, which was afterwards heated to evaporate the liquid solvent before LIBS analysis was carried out detecting CaF emission. 15 The first of these works was a proof of concept and therefore provided no LODs; the experiments were performed with 20 μL of a 0.1% F liquid sample. The latter provided remarkable LODs of 0.38 mg kg −1 with a usage of 100 μL of liquid sample.…”