Starch paper - Names and Identifiers
Starch paper - Introduction
Starch paper is a commonly used chemical test paper used to detect whether a solution contains Starch. Its main properties are as follows:
1. Color reaction: Starch paper is made of filter paper or fiber paper coated with Starch solution after treatment. When in contact with a solution containing starch, the starch on the test paper will form a blue-black complex with the iodine in the solution, thus indicating the presence of starch.
2. Sensitivity: Starch paper has a certain sensitivity in detecting the concentration of Starch in the solution. Generally, as long as the concentration of Starch in the solution reaches 0.1% or higher, a clear blue-black change can be shown through the Starch paper.
The main uses of Starch paper are as follows:
1. Starch detection: Starch paper is often used to detect whether Starch is contained in food, plant tissue and microbial culture medium.
2. Chemical experiments: in chemical experiments, starchpaper is often used to detect the Starch content in the solution, so as to judge the process or result of the reaction.
The preparation method of starchpaper is relatively simple, and the general steps are as follows:
1. Prepare test paper: Cut filter paper or fiber paper into strips of appropriate size.
2. Making starch solution: add appropriate amount of starch powder into enough cold distilled water, stir and dissolve to make 10% starch solution.
3. Coating test paper: the prepared starch solution evenly coated on the test paper, and dry.
safety precautions should be paid attention to during the use of starchpaper:
1. Hand protection: When applying starch solution and carrying or handling test paper, laboratory gloves should be worn to avoid skin contact.
2. Avoid pollution: When using starchpaper, avoid contacting the test paper with other substances to avoid misjudgment of the results.
3. Storage safety: starchpaper should be stored in a dry, dark and cool place, away from flammable substances and incompatible substances such as acid and alkali.
Last Update:2024-04-09 21:21:28