Detection of heavy metal ions using laser-induced breakdown spectroscopy combined with filter paper modified with PtAg bimetallic nanoparticles

Detection of chromium in different valence states in water and soil using laser-induced breakdown spectroscopy combined with an ion enrichment chip

“…This phenomenon becomes more obvious with increasing analyte concentration, leading to the gentle slope of the calibration curve at higher concentrations of Cr( vi ) (0.5–5 mg L −1 ). 12,31 The LoD (3 σ blank / S , where σ blank represents the standard deviation of the blank signals, and S represents the slope of the calibration curve) in the linear range of 0.01–0.5 mg L −1 was 0.004 mg L −1 , which is lower than the water control standard in China (GB 3838-2002, class one water, 0.01 mg L −1 ). The R 2 (goodness of fit) and root mean square error of cross-validation (RMSECV, leave-one cross-validation method) were 0.994 and 0.035 mg L −1 for 0.01–0.5 mg L −1 , and 0.989 and 0.294 mg L −1 for 0.5–5 mg L −1 , respectively.…”

“…11 Enriching trace heavy metal elements is key to detecting them at sub-ppm concentrations. [12][13][14] For example, Ruiz et al combined LIBS and dispersive micro solidphase extraction (DmSPE) to detect Cr. The authors used activated carbon and graphene oxide as the adsorbents, and the respective limits of detection (LoDs) were 41 mg L −1 and 8 mg L −1 .…”

Detection of Al, Mg, Ca, and Zn in copper slag by LIBS combined with calibration curve and PLSR methods

“…On the other hand, Laser-Induced Breakdown Spectroscopy (LIBS) is an atomic emission spectroscopy technology that enables quantitative or qualitative analysis of sample elemental composition. With its remote non-contact detection capabilities, absence of any complex sample pretreatment requirements, rapid analysis speed, simultaneous analysis of multiple elements, lack of radiation, and robust adaptability to harsh environments [4], it has been extensively applied in various fields [5] such as environmental monitoring [6], resource exploration [7][8][9], metal smelting [10], and agricultural production [11].…”

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

“…Here, the filter paper sampling (FPS) method is proposed to collect the waste oils because the filter paper stands out as a fast, economical, and efficient sampling material that can easily absorb the substances in liquid samples. This sampling method could allow for more efficient laser-sample interactions in LIBS, enabling rapid and highly sensitive qualitative and quantitative analysis of heavy metal ions in solutions . To benefit human life and health, this is the first time that a method combining DA-LIBS and FPS (DA-LIBS-FPS) is presented for the qualitative and quantitative analysis of the hazardous components in waste oils.…”

“…This sampling method could allow for more efficient laser-sample interactions in LIBS, enabling rapid and highly sensitive qualitative and quantitative analysis of heavy metal ions in solutions. 15 To benefit human life and health, this is the first time that a method combining DA-LIBS and FPS (DA-LIBS-FPS) is presented for the qualitative and quantitative analysis of the hazardous components in waste oils. Thanks to DA-LIBS-FPS, highquality laser-induced plasma spectra are obtained, and the qualitative and quantitative analysis performance of LIBS is significantly improved.…”