Sulfur dioxide rapid test kit and its use

A rapid determination technology of sulfur dioxide, which is applied in the direction of analyzing materials through chemical reactions, material analysis through observing the influence of chemical indicators, color/spectral characteristic measurement, etc. It can solve the problems of low sensitivity, long detection time, unfavorable Popularization and on-site measurement and other issues, to achieve the effect of popularization, low price and suitable for on-site measurement

Inactive Publication Date: 2006-05-24
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF0 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, sodium tetrachloromercury-pararosaniline colorimetric method is widely used in China to determine SO in food. 2 [GB/T 5009.34-1996], but the determination process needs to use highly toxic high mercury chloride and the operation steps are complicated, and equipment is required. In addition, there are literature reports, and the oscillographic polarographic method can be used to determine the residual amount in food. Sulfur dioxide, but thi...

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
  • Sulfur dioxide rapid test kit and its use
  • Sulfur dioxide rapid test kit and its use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The sulfur dioxide rapid determination kit is equipped with 5 reactors (15*17mm plastic test tube), each reactor is equipped with 0.5g zinc powder, and 1 reactor plug. Between the upper and lower end surfaces of the reactor plug, there is a through-communicating rectangular slit, so that the filter paper can pass through the reactor plug and hang vertically in the reactor. There are also 50mL of 7M hydrochloric acid, 50 pieces of lead acetate test paper, 1 piece of thin plastic sheet in the kit. The specification and shape of the thin plastic sheet are the same as the test paper, and 1 standard color comparison card. The minimum detection limit of the card is 6.0mg / Kg. Such as figure 1 As shown, the brown color of the standard color card is divided into 5 color grades from light to dark; and the corresponding sulfur dioxide concentrations measured are 6.0mg / Kg, 9.0mg / Kg, 30.0mg / Kg, 60.0mg / Kg, 100.0mg / Kg (the determination of the brown color of the standard color card ...

Embodiment 2

[0026] The sulfur dioxide rapid determination kit is equipped with 20 reactors, each reactor is equipped with 1g of zinc powder, a reactor plug, 100mL of 7M hydrochloric acid, 100 pieces of lead acetate test paper, and 1 piece of thin plastic sheet in the kit. The specifications and shape of the thin plastic sheet are the same as those of the test paper, and one standard color comparison card. The brown color of the standard color comparison card is divided into 10 grades of color system from light to dark, and the corresponding sulfur dioxide concentration measured is 6.0mg / Kg, 9.0mg / Kg, 15mg / Kg, 20mg / Kg, 30.0mg / Kg, 40mg / Kg, 50mg / Kg, 60.0mg / Kg, 80mg / Kg, 100.0mg / Kg. Others are with embodiment 1.

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

Without need of additional instrument, the kit is capable of mensurating range of sulfur dioxide contained in article rapidly; and minimum limit of detection is 6.0mg/Kg. The disclosed kit includes reactor with zinc powder, reactor plug with slit, 7-8m test paper of hydrochloric acid and lead acetate, the standard color grade in brown series, and thin plastic plant. The method includes steps: adding the soak of specimen to be tested into reactor with 0.5-2.0g zinc powder being loaded; adding hydrochloric acid, placing cover, overhanging wetted test paper of lead acetate inside the reactor; after 3 min, comparison is carried out between color of the test paper and standard color grade; determining content range of sulfur dioxide. Features are: simple operation, quick and sensitive, and widely available to test in site.

Description

technical field [0001] The invention belongs to a test kit for detection, and relates to a method and a device for quickly measuring the content of sulfur dioxide in food. Background technique [0002] In recent years, driven by money and interests, some unscrupulous traders have used various chemical methods to "beautify" their products and deceive consumers. One of the more common cases is to fumigate food with sulfur. [0003] Sulfur is a yellow or light yellow granule (powder) or flake, flammable. Sulfur is insoluble in water, slightly soluble in ethanol and ether, soluble in carbon disulfide, carbon tetrachloride and benzene. It has insecticidal, acaricidal and bactericidal effects. [0004] Because sulfur will combine with oxygen during the fumigation process to produce sulfur dioxide, and sulfur dioxide has a bleaching effect, so illegal traders mainly use sulfur fumigation to bleach or whiten food; at the same time, sulfur has a bactericidal effect, so it can be us...

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): G01N21/78G01N21/25
Inventor 王硕崔小军
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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