Online calibration of laser-induced breakdown spectroscopy for detection of heavy metals in water

Abstract

In order to reduce the fluctuation of LIBS detection spectrum of liquid sample, the full-spectrum sum method and the internal standardization method is adopted, using an equal-RSD normalization algorithm to calibrate the detection spectrum. Experiment result shows that the full-spectrum sum method reduced the RSD of parallel samples of Cd and Cr to 9.4% and 11.06% from 28.32% and 31.93% respectively, yielded better overall calibration than the singleelement internal standardization approach, thereby suggesting that the former method is convenient and effective for online calibration of LIBS for detection of aqueous heavy metals.

Study on tea harvested in different seasons based on laser-induced breakdown spectroscopy

“…Laser-induced breakdown spectroscopy (LIBS) is a very promising kind of atomic emission spectrum detection technology, which has the advantages of simultaneous multi-element analysis, real-time and rapid detection, simple preprocessing and small sample loss [4][5][6][7][8]. LIBS can be employed for element detection and analysis for solids [9][10][11], liquids [12][13][14][15], gases [16,17] and aerosols [18][19][20]. Currently, studies reporting on the detection of heavy metals and the seasonal changes of element content in tea by LIBS are rare.…”

In situ online detection of atmospheric particulate matter based on laser induced breakdown spectroscopy: a review

“…75 While these sensors contribute to monitoring air quality, they cannot directly detect elements and provide rapid elemental analysis. LIBS can be applied to a variety of sample types, including solid, [76][77][78][79] liquid, [80][81][82][83] gaseous, [84][85][86] and biological samples 87 with the advantages of multi-element analysis, high sensitivity, real-time non-destructive and remote control. 76,[88][89][90][91] In order to detect indoor particles, Lu et al used LIBS technology to detect elements in indoor air, human exhalation and smoke from different burning objects.…”

Quantitative analysis of Mn and composition detection in mosquito-repellent incense ash with laser-induced breakdown spectroscopy

“…Quantitative analysis of Mn and composition detection in mosquitorepellent incense ash with laser-induced breakdown spectroscopy material analysis, environmental detection, botany and other fields [17][18][19][20][21].…”