Gel for detecting formaldehyde in air and water solution

Abstract

The invention relates to detection gel, and in particular to one-component gel for detecting formaldehyde in air and water solutions, which is applicable to the field of environment detecting. A preparation method of the gel is as follows: taking 99 mass parts of distilled water, heating to 85 DEG C, adding 1 mass part of basic fuchsin, and stirring. The gel for detecting the formaldehyde in the air and the water solutions is characterized in that the preparation method comprises the following steps: taking 5 mass parts of 1% basic fuchsin solution, adding 70 to 80 mass parts of distilled water, starting stirring, then adding 10 mass parts of 10% sodium sulphite solution, adding 10 mass parts of 4% sulfuric acid solution, adding 0.1 to 0.5 mass part of active carbon, stirring, standing, and filtering to obtain a colorless and transparent detection reagent for later use; taking 70 mass parts of the detection reagent, adding 0.3 to 10 mass parts of thickening gel, uniformly stirring and dispersing, so as to obtain a detection solution for later use; then taking 0.1 to 0.5 mass part of polyamino acid coenzyme to be dissolved in 10 mass parts of distilled water, gradually dropwise adding an obtained solution into the detection solution, and gradually gelling the solution to a paste, adding distilled water to 100 mass parts, uniformly stirring, thus obtaining the toothpaste-shaped formaldehyde-detecting gel.

Description

technical field [0001] The invention relates to a detection gel, in particular to a single-component formaldehyde detection gel in air and aqueous solution, which is suitable for the field of environmental detection. Background technique [0002] Formaldehyde is a widely used chemical raw material, and it is also the main pollutant of indoor air pollution after room decoration. The national GB50325-2010 standard stipulates that the indoor formaldehyde concentration shall not exceed 0.1 (mg / m³). There are also some businesses that add or spray formaldehyde solution to seafood, vegetables and other foods to achieve the purpose of keeping fresh. Consumers and regulators, in the field, need a convenient, rapid, semi-quantitative reagent to detect the presence of formaldehyde in air and water. [0003] At present, the rapid detection products such as formaldehyde detection boxes and test strips sold on the market are all two-component or three-component, and the operation proces...

AI Technical Summary

Problems solved by technology

[0004] Commonly used formaldehyde detection methods include: phenol reagent method, phloroglucinol method, Schiff reagent, chromotropic acid and other common methods. production

At present, there is no portable single-component product on the market that has a shelf life of 12-18 months at room temperature and is suitable for rapid qualitative detection of formaldehyde in both air and water environments.