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

Method for quantitatively detecting multiple heavy metals in leather at same time based on LIBS (Laser-Induced Breakdown Spectroscopy) technology

A technology of laser-induced breakdown and spectroscopy, which is applied in the detection field of heavy metals, can solve problems such as complex procedures, long time-consuming, and difficult detection of organic samples, and achieve the effects of good repeatability, high sensitivity, and fast data analysis speed

Pending Publication Date: 2016-05-11
TAIZHOU ENTRY EXIT INSPECTION & QUARANTINE BUREAU PEOPLES REPUBLIC OF CHINA +1
View PDF4 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the problem that the existing laser-induced breakdown spectroscopy technology is usually only for inorganic solid samples, but it is difficult to detect organic samples
[0008] In order to solve the problem of complex and time-consuming technical procedures for detecting the content of heavy metal elements in leather, the technical solution adopted in the present invention is:

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 quantitatively detecting multiple heavy metals in leather at same time based on LIBS (Laser-Induced Breakdown Spectroscopy) technology
  • Method for quantitatively detecting multiple heavy metals in leather at same time based on LIBS (Laser-Induced Breakdown Spectroscopy) technology
  • Method for quantitatively detecting multiple heavy metals in leather at same time based on LIBS (Laser-Induced Breakdown Spectroscopy) technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the drawings and embodiments.

[0023] This embodiment is a method for detecting heavy metals in leather based on laser induced breakdown spectroscopy. Such as figure 1 As shown, the LIBS system used in the experiment is mainly composed of Q-switched pulse Nd:YAG laser, sample stage, digital delay controller, echelle spectrometer, ICCD detector and computer. Q-switched pulse Nd: YAG laser, the working laser wavelength is 1064nm, the pulse width is 10ns, the repetition frequency is 10Hz, the single pulse laser energy is 150mJ, the laser energy is an energy attenuation system composed of a half wave plate and a laser Glan prism Adjust, the diameter of the excitation light beam is 5mm.

[0024] At the beginning of the experiment, the 1064nm laser pulse emitted by the laser was reflected by the reflector, and then focused to the sample surface by a focusing lens with a focal length of 175mm. The diamete...

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
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for quantitatively detecting multiple heavy metals in leather at the same time based on an LIBS (Laser-Induced Breakdown Spectroscopy) technology. The method adopts an LIBS detecting system which is formed by a Q-switched pulse Nd:YAG (Yttrium Aluminum Garnet) laser, an echelle grating spectrometer, an ICCD (Intensified Charge-Coupled Device) detector, a rotating platform and the like. The method comprises the following steps: firstly, regulating laser energy by an energy attenuation system consisting of a half-wave plate and a laser Glan prism, gathering the laser energy on the surface of a sample which is fixed to the rotating platform through a focusing lens, and ablating, gasifying and ionizing substances on the surface of the detected sample, thus forming laser plasma; secondly, obtaining a spectral signal of the laser plasma through a spectrum collection system, analyzing and converting element types corresponding to a spectral line, and obtaining content information of characteristic elements through conversion; thirdly, obtaining concentrations of heavy metal elements by combining a CF (Calibration-free)-LIBS method according to the obtained information of the elements.

Description

Technical field [0001] The invention relates to a detection technology of heavy metals, in particular to a rapid detection method based on laser induced breakdown spectroscopy technology combined with a free calibration method for simultaneous and rapid quantitative detection of multiple heavy metals in leather. Background technique [0002] Leather products are commodities exported by Zhejiang Province, and their output value and export status are self-evident. Heavy metals are extremely harmful to the human body. Countries and regions such as the European Union and the United States have strict requirements for heavy metals in leather. According to the current detection methods, the annual cost is huge and it also takes a lot of time. In the past few years of work, we have found that the proportion of heavy metals such as Pb, Cd, Cr, etc. detected in footwear products is not high, which means that we have spent a lot of money and time in a risk rate. Things. [0003] At present...

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 Applications(China)
IPC IPC(8): G01N21/71
CPCG01N21/718G01N33/447
Inventor 李超王吉陈华才张炜
Owner TAIZHOU ENTRY EXIT INSPECTION & QUARANTINE BUREAU PEOPLES REPUBLIC OF CHINA
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