Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Pretreatment method of liquid samples in laser-induced breakdown spectroscopy detection technology

A laser-induced breakdown, liquid sample technology, applied in the preparation of test samples, material excitation analysis, etc., can solve the problems of low trace heavy metal enrichment ability, expensive filter membrane, low practicability, etc., and achieves good results. Prospect of application, improved enrichment ability, high sensitivity and high accuracy effect

Active Publication Date: 2017-02-22
SICHUAN UNIV
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Among the methods disclosed in the prior art, the ability to enrich trace heavy metals in liquid samples is still not high, and most of them use increased sampling volume to improve detection sensitivity, and some pretreatment methods have expensive filter membranes and processing time fluctuations. Or complex steps and other issues, resulting in low practicability
At the same time, there is no report on the application of 2,4,6-trimercapto-1,3,5-triazine trisodium salt in the pretreatment method of liquid samples detected by laser-induced breakdown spectroscopy

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
  • Pretreatment method of liquid samples in laser-induced breakdown spectroscopy detection technology
  • Pretreatment method of liquid samples in laser-induced breakdown spectroscopy detection technology
  • Pretreatment method of liquid samples in laser-induced breakdown spectroscopy detection technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1 The inventive method detects the heavy metal concentration in the liquid sample

[0049] (1) Take 2-5ml of liquid sample, and use a disposable plastic syringe to pass the sample through a 0.4 micron pore syringe filter to remove insoluble impurities;

[0050] (2) Use a pipette gun to take 1.0ml of the above-mentioned liquid sample after removing insoluble impurities, put it in a 3ml plastic centrifuge tube, adjust the pH value with 0.5mol / L nitric acid or ammonia solution as needed, and adjust it to pH=6.0 ~7.0;

[0051] (3) Select trimercaptotriazine trisodium salt (TMT) as a metal precipitation agent, add 200 μl of 15% TMT solution to the sample treated in step (2), and mix by pipetting;

[0052] (4) Cut the 0.2 μm pore diameter polymer microporous filter membrane into small pieces with a diameter of about 5 mm, infiltrate it in ultrapure water, and load it on the filter membrane support device, and use a disposable plastic syringe to absorb the treated ...

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
recovery rateaaaaaaaaaa
Login to View More

Abstract

The invention discloses a liquid sample pretreatment method in laser-induced breakdown spectroscopy detection technology, which comprises the following steps: (1) taking a liquid sample and removing insoluble impurities; (2) adding a precipitating agent , and mix uniformly; (3) filter the liquid sample treated in step (2) through a microporous filter membrane with a pore size ≤ 0.2 μm, and remove excess liquid on the filter membrane to obtain a filter membrane. The present invention uses a precipitant to precipitate and enrich heavy metals in liquid samples, which greatly improves the ability to enrich heavy metals and reduces the sampling volume of liquid samples. The sampling volume can be detected by only 1ml, and the detection sensitivity and accuracy High, its detection limit can reach 10‑1~10ppb, and it can detect multiple metal elements at the same time; it also has the advantages of short pretreatment time, simple steps, low cost, etc., and has a good application prospect.

Description

technical field [0001] The invention relates to a pretreatment method for liquid samples in laser-induced breakdown spectroscopy detection technology. Background technique [0002] The detection of heavy metal ions in water samples is an important item in water quality monitoring. Traditional metal detection methods in water samples include spectrophotometry, flame atomic absorption spectrophotometry, graphite furnace atomic absorption spectrophotometry, inductively coupled plasma atomic emission spectrometry, and inductively coupled plasma mass spectrometry. Among them, spectrophotometry requires the use of color reagents to react with metal ions, which has the disadvantages of large interference and the inability to measure multiple elements at the same time. Other instrument analysis methods have the disadvantages of large equipment volume and weight, and need to burn or protect gas sources. Suitable for laboratory analysis. Some of these methods cannot be well applied ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/63G01N1/28G01N1/38
Inventor 段忆翔王旭王杰林庆宇
Owner SICHUAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com