Method for evaluating uncertainty of content detection result of polychlorinated biphenyl in single-point quantitative aquatic products

A technology for polychlorinated biphenyls and detection results, which is applied in the field of chemical detection and can solve the problems of complex matrix components, interference of multi-component instrument analysis, and difficult processing procedures.

Inactive Publication Date: 2018-10-19
FISHERIES SCI RES INST OF JILIN PROVINCE
View PDF1 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the determination data of PCBs content in aquatic products is usually obtained by gas chromatography and gas chromatography-mass spectrometry. Due to the complex matrix composition of aquatic products, the pretreatment process is difficult, and the multi-component instrument analysis has many interferences. These factors will affect the detection results. quality makes a difference

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 evaluating uncertainty of content detection result of polychlorinated biphenyl in single-point quantitative aquatic products
  • Method for evaluating uncertainty of content detection result of polychlorinated biphenyl in single-point quantitative aquatic products
  • Method for evaluating uncertainty of content detection result of polychlorinated biphenyl in single-point quantitative aquatic products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0069] The evaluation method for the uncertainty of the detection results of single-point quantitative polychlorinated biphenyls in aquatic products. The principle of determination is: use gas chromatography-ECD method to determine the content of polychlorinated biphenyls in aquatic products. PCB198 is used as the quantitative internal standard. After the sample was extracted by heating and shaking in a water bath, it was purified by sulfuric acid and measured by gas chromatography-electron capture detector. The retention time was qualitative and the internal standard method was quantitative.

[0070] The evaluation method for the uncertainty of the detection results of PCB content in single-point quantitative aquatic products includes the following steps:

[0071] (1) Weighing: Weigh a uniformly pulverized fish sample, and give a weighing mass m of 5.0 g, accurate to 0.1 g.

[0072] (2) 40ng / mL (C n1 ) Preparation of internal standard working solution: the purchased concentr...

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 evaluating uncertainty of content detection result of polychlorinated biphenyl in single-point quantitative aquatic products and belongs to the technical field ofchemical detection. The method comprises the following steps: measuring the polychlorinated biphenyl content of the aquatic products by a gas chromatography-ECD method, quantifying by an internal standard method, analysing main sources of the uncertainty, quantifying uncertainty component, calculating synthetic standard uncertainty, calculating expanded uncertainty and representing the measuringresult. Accurate analysis and reasonable expression of uncertainty of sample treatment process, instrument measuring process and quantitative analysis process are realized by establishing uncertaintycalculation mathematic models, analyzing related uncertainty sources and performing reasonable quantitative calculation on each component.

Description

technical field [0001] The invention belongs to the technical field of chemical detection, in particular to a method for evaluating the uncertainty of detection results of polychlorinated biphenyl content in aquatic products by a single-point internal standard method. Background technique [0002] Polychlorinated Biphenyls (PCBs) are the most representative class of persistent organic pollutants (POPs), with prominent carcinogenic, teratogenic, and mutagenic biotoxicity, bioaccumulation, and environmental persistence. It is extremely harmful to human health. Seven "indicative PCB" monomers (PCB28, PCB52, PCB101, PCB118, PCB153, PCB138, PCB180) are specified in the Global Environmental Monitoring System / Food Planning Section (GEMS / FOOD) as commonly used indicators for monitoring PCBs pollution, usually in the form of The total PCBs analysis of aquatic food is the main monitoring index. The US Food and Drug Administration (FDA) recommends that the maximum allowable concentrat...

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): G01N30/02
CPCG01N30/02
Inventor 王文兰郭军高春山鞠松柏赵全东刘艳辉高娜杨炳坤
Owner FISHERIES SCI RES INST OF JILIN PROVINCE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap