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

A method for detecting heavy metals using a plasma atomic emission spectrometer

A technology of plasma and atomic emission, which is applied in the field of spectrometers, can solve problems such as easy-to-contaminate condenser mirrors, and achieve the effects of eliminating cumbersome steps, convenient use and operation, and simple and reasonable principles

Active Publication Date: 2022-03-04
HARBIN INST OF TECH AT WEIHAI
View PDF17 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is an insurmountable defect in light collection at the gas outlet. When detecting solids and other high-concentration liquid samples, the atomized sample gas flow will contain a lot of solid impurities, which will easily contaminate the condenser when it exits with the gas flow.

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
  • A method for detecting heavy metals using a plasma atomic emission spectrometer
  • A method for detecting heavy metals using a plasma atomic emission spectrometer
  • A method for detecting heavy metals using a plasma atomic emission spectrometer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for detecting heavy metals using a plasma atomic emission spectrometer, a plasma atomic emission spectrometer with a front optical path system of the present invention, the plasma atomic emission spectrometer includes a front optical path system, a spectroscopic detection system, a display control module, and a gas path system and the battery, the spectroscopic detection system includes a photoelectric conversion and signal processing module, the spectroscopic detection system is connected with the display control module, and is controlled by the display control module; the battery is respectively connected with the spectroscopic detection system and the display control module, and is respectively the The control module supplies power; the gas circuit system is provided with a working gas source and an airflow control valve, wherein the airflow control valve is connected to the working gas source, the working gas source is an inert gas, and the inert gas is argon...

Embodiment 2

[0039] Utilize the method that the plasma atomic emission spectrometer that has the optical path system before the plasma atomic emission spectrometer of embodiment 1 detects heavy metals, by figure 2 As shown, the following steps are included in sequence:

[0040] (1) Preparation of the solution to be tested: use the extractant diethylenetriaminepentaacetic acid or dilute acid solution to extract the metal elements in the soil sample by leaching to obtain the solution to be tested.

[0041] (2) First, open the gas flow control valve of the gas circuit system, and pass the inert gas working gas source from the inlet 3 into the inlet branch pipe 2, then enter the main pipe 1, the plasma excitation area 6 in turn, and finally from the gas outlet 4 Exhaust; the inert gas is argon.

[0042] (3) The gaseous sample to be tested is prepared by electrothermal evaporation:

[0043] The outlet of the electrothermal evaporation device 13 is sealed and connected with the air inlet 3 of...

Embodiment 3

[0052] Taking the test of available lead in soil as an example, the detection method and performance evaluation of the present invention will be described below.

[0053] Utilize the method for detecting lead in soil with the front optical path system plasma atomic emission spectrometer of embodiment 2, by figure 2 As shown, the following steps are included in sequence:

[0054] (1) Preparation of the solution to be tested: take 1 g of the soil sample, extract it with 5 ml of diethylenetriaminepentaacetic acid extractant for two hours, filter the extract to obtain the solution to be tested, and directly detect the solution to be tested.

[0055] (2) First, open the gas flow control valve of the gas circuit system, and pass the inert gas working gas source from the inlet 3 into the inlet branch pipe 2, then enter the main pipe 1, the plasma excitation area 6 in turn, and finally from the gas outlet 4 Exhaust; the inert gas is argon, and the gas flow rate is 0.3L / min.

[0056...

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

No PUM Login to View More

Abstract

The invention relates to a method for detecting heavy metals by using a plasma atomic emission spectrometer, which solves the technical problems of inconvenient operation in the process of detecting heavy metals in the prior art, serious pollution of a window plate resulting in large loss of optical signals, high detection cost, low efficiency, and slow speed. The invention provides a method for detecting heavy metals by means of a plasma atomic emission spectrometer, which comprises the following steps in turn: (1) first passing a working gas source into an air intake branch pipe from an air inlet; (2) after preparing a gaseous sample to be tested, Then use the plasma excitation device to generate stable plasma in the plasma excitation area; (3) the gaseous sample to be measured enters the plasma excitation area and is excited by the plasma to generate a corresponding characteristic light signal, and then the characteristic light signal travels along the main tube The interior passes through the window plate through the light-gathering port in the opposite direction to the gas outlet, and enters the spectrometer to obtain the spectral information of the sample atoms to be measured. The invention is widely used in the spectrometer field of analytical instruments.

Description

technical field [0001] The invention relates to the field of spectrometers for analytical instruments, in particular to a method for detecting heavy metals using a plasma atomic emission spectrometer. Background technique [0002] With the globalization of environmental pollution, the whole society pays more and more attention to heavy metal pollution in soil. Existing soil heavy metal detection methods usually use methods such as atomic absorption spectroscopy, inductively coupled plasma atomic emission spectroscopy, and atomic fluorescence spectroscopy. The analysis and detection of the treated soil solution is cumbersome overall, and the instrument is large in size and high in detection cost, making it difficult to be widely used in on-site rapid detection. [0003] The front optical path system of the existing spectrometer mainly focuses the light into the optical fiber through the lens, and then transmits it to the spectrometer through the optical fiber. For example, th...

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): G01N21/67G01N21/01
CPCG01N21/01G01N21/67
Inventor 姜杰李娜张静张向楠刘向宇
Owner HARBIN INST OF TECH AT WEIHAI
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