TY - JOUR
T1 - Laser-Induced Breakdown Spectroscopic (LIBS) Analysis of Trace Heavy Metals Enriched by Al 2 O 3 Nanoparticles
AU - Niu, Sheng
AU - Zheng, Lijuan
AU - Qayyum Khan, Abdul
AU - Zeng, Heping
N1 - Publisher Copyright:
© The Author(s) 2019.
PY - 2019/4/1
Y1 - 2019/4/1
N2 - We demonstrated a unique method for the detection of heavy metals, such as Ni, Cr, and Cd, at trace level in aqueous solutions by laser induced breakdown spectroscopy (LIBS) enriched by aluminum oxide (Al 2 O 3 ) nanoparticles (NP) adsorption. Al 2 O 3 NPs were used for the sample phase transformation and heavy metals pre-concentration because of its excellent adsorption capacity and sparse spectral lines. The influence of laser wavelength and laser irradiance on the signal intensity was investigated. With 45 mL solutions used for enrichment and adsorption, limits of detection obtained for Ni, Cr, and Cd were 9.61, 8.49, and 71.6 μg/L under 532 nm laser ablation, and 22.5, 20.4, and 83.8 μg/L under 1064 nm laser ablation, respectively. The relative standard deviations of all elements were about 12% or 13%. Moreover, Al 2 O 3 NPs adsorption enrichment of target elements was verified and the detection sensitivity was improved by increasing the amount of sample solutions.
AB - We demonstrated a unique method for the detection of heavy metals, such as Ni, Cr, and Cd, at trace level in aqueous solutions by laser induced breakdown spectroscopy (LIBS) enriched by aluminum oxide (Al 2 O 3 ) nanoparticles (NP) adsorption. Al 2 O 3 NPs were used for the sample phase transformation and heavy metals pre-concentration because of its excellent adsorption capacity and sparse spectral lines. The influence of laser wavelength and laser irradiance on the signal intensity was investigated. With 45 mL solutions used for enrichment and adsorption, limits of detection obtained for Ni, Cr, and Cd were 9.61, 8.49, and 71.6 μg/L under 532 nm laser ablation, and 22.5, 20.4, and 83.8 μg/L under 1064 nm laser ablation, respectively. The relative standard deviations of all elements were about 12% or 13%. Moreover, Al 2 O 3 NPs adsorption enrichment of target elements was verified and the detection sensitivity was improved by increasing the amount of sample solutions.
KW - LIBS
KW - Laser-induced breakdown spectroscopy
KW - heavy metals
KW - nanometer Al O
KW - pre-concentration
UR - https://www.scopus.com/pages/publications/85064271692
U2 - 10.1177/0003702819829509
DO - 10.1177/0003702819829509
M3 - 文章
C2 - 30777450
AN - SCOPUS:85064271692
SN - 0003-7028
VL - 73
SP - 380
EP - 386
JO - Applied Spectroscopy
JF - Applied Spectroscopy
IS - 4
ER -