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

Qualitative source analyzing method for lead exposure source in human urine

A source apportionment and urine technology, applied in the field of analysis and identification of exposure sources, can solve the problems of ineffective identification and analysis of heavy metal multi-source systems in sediments, qualitative evaluation of difficult pollution contributions, heavy workload, etc., to achieve good operability and practicality The effect of high precision, small error and simple method

Inactive Publication Date: 2015-03-04
UNIV OF SCI & TECH BEIJING
View PDF2 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these two methods are mainly for statistical analysis and quality evaluation of the total amount and chemical forms of heavy metal elements in sediments, and cannot effectively identify and analyze the multi-source system of heavy metals in sediments, and it is difficult to make a qualitative evaluation of the pollution contribution; in addition, these two methods Both of these methods require large-scale sampling, and the workload is relatively large, so they are limited in practical application.

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
  • Qualitative source analyzing method for lead exposure source in human urine
  • Qualitative source analyzing method for lead exposure source in human urine
  • Qualitative source analyzing method for lead exposure source in human urine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] There are four stable isotopes of lead in nature, which are 204 Pb, 206 Pb, 207 Pb and 208 Pb, the latter three are 238 U 235 U 232 The final product of Th decay, the abundance of these three isotopes (the abundance of isotopes in nature, also known as the natural occurrence ratio, refers to the proportion of this isotope in all natural isotopes of this element, and the abundance is generally expressed in The percentage indicates that the abundance of man-made isotopes is zero. Because various isotopes are often distributed evenly in nature, the calculation of the average value is more accurate, so the atomic weights listed on the periodic table are actually weighted by the abundance of various isotopes mean) increases with time, while 204 Pb has not yet been found to be related to which radioactive isotope parent, and its absolute content does not change with time. because 238 U 235 U and 232 The decay constants of Th are different, which determines the corre...

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 discloses a qualitative source analyzing method for a lead exposure source in human urine. The qualitative source analyzing method comprises the following steps: collecting an environment medium sample and a urine sample and determining the content of lead to obtain a characteristic specific value 208Pb / 206Pb; and calculating a lead isotope medium difference index D to qualitatively evaluate the lead exposure source in the urine. The invention provides the qualitative evaluation method and the lead isotope medium difference index D is creatively provided; and the evaluation method and the determination and the calculation of the lead isotope medium difference index have direct guide meaning on the evaluation of the lead exposure source in the urine. The evaluation method disclosed by the invention is applicable to the analysis and the determination of the lead exposure source in the urine, and the comprehensive evaluation is carried out in a qualitative manner; and the method is simple, objective and accurate, has the good repeatability and small errors, and has the very good operability and practicability, and scientific theoretical foundations are provided for the determination of the lead exposure source in the urine.

Description

technical field [0001] The invention relates to a method for analyzing and determining the exposure source of lead in human urine samples, in particular to a qualitative evaluation method for the source of lead exposure in urine. Background technique [0002] Lead is a soft slightly off-white heavy metal, which is widely distributed in the earth's crust and has a large amount of reserves. It is not degradable in the natural environment. Once mined, it will permanently exist in the living environment. Due to its unique properties such as softness, ductility, low melting point and corrosion resistance, it is one of the most widely used metals in industrial production. Current scientific research shows that not only is lead not an essential nutrient element for the human body, but excessive lead can also cause damage to multiple systems of the human body, including the nervous system, hematopoietic system, cardiovascular system, and endocrine system. Children are more sensitiv...

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): G01N27/62
Inventor 段小丽曹素珍赵秀阁王贝贝马瑾林春野孙承业黄楠董婷
Owner UNIV OF SCI & TECH BEIJING
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