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

A kind of method for detecting heavy metal lead in raw eggs

A technology for heavy metals and raw eggs, which is applied in the direction of chemical reaction of materials and material analysis by observing the influence of chemical indicators, which can solve the problems of inconvenient detection of heavy metals and lead.

Active Publication Date: 2020-10-27
GUANGZHOU ANNUO FOOD SCI & TECH CO LTD
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a method for detecting heavy metal lead in fresh eggs, aiming to solve the problem of inconvenient detection of heavy metal lead in fresh eggs by existing methods

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 kind of method for detecting heavy metal lead in raw eggs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Take 1 whole fresh egg, break it and mix the egg white and egg yolk evenly;

[0047] (2) Measure 2ml of the above mixed sample and add it to a 10mL centrifuge tube;

[0048] (3) Add 2 mL of acetonitrile and 1 mL of 0.1 mol / L hydrochloric acid solution to the above centrifuge tube, shake and mix for 1 min, and centrifuge at 4000 r / min for 2 min.

[0049] (4) Add 150uL 1.3mol / L thiourea aqueous solution and 150uL 0.2mol / L lemon triamine aqueous solution to the above sample solution, shake gently and wait for 10~20S.

[0050] (5) Then add 50uL of 2 g / L xylenol orange solution, 50uL of 1.5g / L o-phenanthroline solution, 50uL of pH5.4 acetic acid-sodium acetate buffer solution, shake and mix well, wait for 10~20S Observe the phenomenon (observe the color change of the supernatant and the egg color change at the bottom of the centrifuge tube).

[0051] It has been determined that when the lead content in fresh eggs exceeds 0.2ppm, the denatured eggs at the bottom of the ...

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 method for detecting heavy metal lead in a fresh egg. The method comprises the steps that egg liquid is obtained after egg white and egg yolk of the to-be-detected fresh eggare mixed uniformly; an organic solvent and hydrochloric acid are added in the egg liquid in sequence, and uniform mixing and centrifugation are conducted to obtain layered liquid, wherein the bottompart is a denaturation egg, and the upper part is clear liquid; an anti-interference reagent is added into the layered liquid, a xylenol orange solution, a phenanthroline solution and a buffer solution are added after primary standing, and after secondary standing, the color of the bottom denaturation egg is observed; if the bottom denaturation egg is purple or purple red, it is shown that the to-be-detected fresh egg contains heavy metal lead. The method solves the problem that it is inconvenient to detect the heavy metal lead in the fresh egg by means of an existing method.

Description

technical field [0001] The invention relates to the technical field of food detection, in particular to a method for detecting heavy metal lead in fresh eggs. Background technique [0002] For a long time, heavy metal pollution has been one of the main reasons affecting the quality and safety of China's food, seriously restricting China's ability to earn foreign exchange from food exports. Among them, Pb is one of the heavy metal elements that pollute the environment and endanger the growth of organisms. It comes from a wide range of sources, mainly from waste, wastewater, garbage, and automobile exhaust. Lead compounds are highly toxic to moderately toxic. Pb is very harmful to the human body and can cause damage to the nervous system, digestive system, immune system, hematopoietic system, and reproductive system. The results of the risk assessment of Pb by the National Codex Alimentarius Commission (CAC) show that the maximum permissible weekly intake (PTWI) of the human ...

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): G01N21/78
CPCG01N21/78
Inventor 毓志超吕丽珊钟汉高杨鹏博杨松林
Owner GUANGZHOU ANNUO FOOD SCI & TECH CO LTD
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