Nitrite test paper

A technology for detecting test paper and nitrite, which is applied in the direction of measuring devices, instruments, and material analysis through optical means, which can solve the problems of unsuitable rapid detection for daily use in households and complex operation procedures, and is conducive to large-scale production , The process is simple, the effect of reducing the use

Inactive Publication Date: 2017-03-22
BEOSON JIANGSU FOOD SAFETY TECH CO LTD
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although most of the above methods can detect trace amounts of nitrite more accurately, the operation process is complicated,

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In the embodiment of the present invention, a nitrite detection test paper is prepared by soaking filter paper in a mixed solution and drying, the soaking time is 1 second, and the drying temperature is 0°C. The ingredients in the mixed solution are: p-aminobenzenesulfonic acid 3g / L, tartaric acid 20g / L, α-naphthylamine 0.1g / L, sulfonamide 3g / L, N-1-naphthylethylenediamine hydrochloride 3g / L L, the solvent is water.

Embodiment 2

[0022] In the embodiment of the present invention, a nitrite detection test paper is prepared by soaking filter paper in a mixed solution and drying, the soaking time is 15s, and the drying temperature is 75°C. The ingredients in the mixed solution are: p-aminobenzenesulfonic acid 60g / L, tartaric acid 320g / L, α-naphthylamine 90g / L, sulfonamide 90g / L, N-1-naphthylethylenediamine hydrochloride 50g / L , the solvent is water.

Embodiment 3

[0024] In the embodiment of the present invention, a nitrite detection test paper is obtained by soaking filter paper in a mixed solution and drying, the soaking time is 2s, and the drying temperature is 0°C. The ingredients in the mixed solution are: p-aminobenzenesulfonic acid 5g / L, tartaric acid 40g / L, α-naphthylamine 0.5g / L, sulfonamide 6g / L, N-1-naphthylethylenediamine hydrochloride 5g / L L, the solvent is water.

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 nitrite test paper. The nitrite test paper is obtained by soaking filter paper in a mixed solution and then performing drying, wherein the mixed solution is prepared from 3-60 g/L of sulfanilic acid, 20-320 g/L of tartaric acid, 0.1-90 g/L of alpha-naphthylamine, 3-90 g/L of sulfanilamide, 3-50 g/L of N-1-naphthylethylenediamine dihydrochloride and a solvent of water. The soaking time is 1-15 s, and the drying temperature is 0-75 DEG C. The prepared nitrite test paper makes contact with a to-be-detected solution, standing is conducted till color development is stable, the color development condition is observed, comparison is conducted with prepared standard color card, and the nitrite content of the to-be-detected solution is obtained. According to the nitrite test paper, the phenomenon that heating decomposition is conducted on sulfanilic acid can be effectively prevented, the properties of all components are better kept to be unchanged, and meanwhile use of an expensive instrument is reduced. The nitrite test paper is good in water solubility, color development of a test paper reaction is not disturbed, the stability is high, and the speed for detecting nitrite is high. According to the nitrite test paper, the adopted technological process is simple, the equipment is simple, and large-scale production is promoted.

Description

technical field [0001] The invention relates to the technical field of food detection, in particular to a nitrite detection test paper. Background technique [0002] Nitrite, a general term for a class of inorganic compounds. Mainly refers to sodium nitrite, sodium nitrite is white to light yellow powder or granular, slightly salty taste, easily soluble in water. It is toxic and highly pathogenic, and long-term intake can cause cancer. And nitrite is often used in food as a color-protecting agent and a preservative; a large amount of chemical fertilizers, fuel combustion, and human and animal wastes and other pollutions make nitrite widely distributed in air, soil, water and plants, which is widely present in nature. Nitrite can contaminate food through milk-producing animals and water. Because the appearance of nitrite is very similar to table salt, it is sometimes mistaken for table salt and added to food, thus causing food poisoning. In addition, nitrite is also produ...

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): G01N21/78
CPCG01N21/78G01N2021/7759
Inventor 张进吴念绮周朱晨张根义胡彬
Owner BEOSON JIANGSU FOOD SAFETY TECH CO LTD
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