Supercharge Your Innovation With Domain-Expert AI Agents!

Method for improving sensitivity of surface enhanced LIBS (laser-induced breakdown spectroscopy) in detection of heavy metal elements in water

A technology for surface enhancement and detection of water, applied in the field of spectral detection, to achieve the effect of improving detection sensitivity and detection ability

Pending Publication Date: 2022-03-08
JILIN UNIV
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, the effect of substrate temperature on the detection sensitivity of SE-LIBS has not been discussed, and the emission spectra of SE-LIBS at different substrate temperatures are worthy of investigation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for improving sensitivity of surface enhanced LIBS (laser-induced breakdown spectroscopy) in detection of heavy metal elements in water
  • Method for improving sensitivity of surface enhanced LIBS (laser-induced breakdown spectroscopy) in detection of heavy metal elements in water
  • Method for improving sensitivity of surface enhanced LIBS (laser-induced breakdown spectroscopy) in detection of heavy metal elements in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0049] Step 1, preparing Pb and Cr solution concentrations are respectively 3.1ng / mL, 6.3ng / mL, 12.5ng / mL, 25ng / mL, 50ng / mL, solid samples of 100ng / mL;

[0050] Step 2. Use thermal conductive silicone grease to fix the Al plate containing the sample on the heater. The thickness of the Al plate is 1mm and the size is 5.0×5.0mm 2 ;

[0051] Step 3. The heating system keeps the initial temperature of the sample at room temperature 25°C through the heater, or increases the initial temperature of the sample from room temperature 25°C to 100°C or 200°C. Wait a few minutes for the sample temperature to stabilize;

[0052] Step 4, the sample is placed on a computer-controlled electric translation stage (Thorlabs, PT3 / M-Z8, moving speed is 0.7mm / s);

[0053] Step five, the Nd:YAG laser focuses the laser pulse beam on the sample surface after passing through a plano-convex lens with a focal length of 100mm;

[0054] Step 6. Before each laser irradiation, the position of the sample is...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention is applicable to the technical field of spectrum detection, and provides a method for improving the sensitivity of surface-enhanced laser-induced breakdown spectroscopy (SE-LIBS) in detection of heavy metal elements in water, and the current research proves that the substrate temperature plays a leading role in improving the detection sensitivity of a surface-enhanced laser-induced breakdown spectroscopy (SE-LIBS) technology. In an experiment, SE-LIBS is used for detecting trace heavy metal elements in an aqueous solution. Influences of substrate temperatures on radiation intensity of Pb and Cr elements are discussed, calibration curves of Pb and Cr at different substrate temperatures are constructed, and corresponding element detection limits (LoD) are calculated. When the temperature of the substrate is from 25 DEG C to 200 DEG C, the element detection limits of Pb and Cr are respectively reduced from 31.7 ng / mL and 4.6 ng / mL to 8.0 ng / mL and 1.2 ng / mL. Therefore, the analysis capability and the detection sensitivity of SE-LIBS detection of the heavy metal elements can be further improved by increasing the temperature of the substrate, and the research provides a feasible scheme for detection of the heavy metal elements in the wastewater.

Description

technical field [0001] The invention belongs to the technical field of spectrum detection, and in particular relates to a method for improving the sensitivity of surface-enhanced LIBS to detect heavy metal elements in water. Background technique [0002] With the improvement of living standards, people pay more and more attention to food safety. The content of heavy metals in drinking water has become the focus of people's attention. Usually, the heavy metals we refer to mainly refer to heavy metals with significant toxicity such as mercury, cadmium, chromium, lead, and metalloid arsenic. Ore smelting, electroplating, plastics, batteries, chemicals and other industries are the main industrial sources of heavy metal emissions. These heavy metals cannot be decomposed in water, and their toxicity will be amplified after drinking. They can strongly interact with proteins and various enzymes in the human body to inactivate them, and may also accumulate in certain organs of the h...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N21/71
CPCG01N21/718G01N2201/06113G01N2201/124
Inventor 陈安民张丹李庆雪姜远飞金明星
Owner JILIN UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com