Y- Rongalit rapid test reagent

Product Introduction

Application

It is widely used for detection Rongalit in food, such as: rice, flour and other food products and tofu skin, fans and other soy products.

Test principle

Rongalit is used in industrial bleach. It used in food processing is using the decomposed formaldehyde with its increase in food flexible, and the decomposition of sulfurous acid has bleaching effect of food. Rongalit has a variety of chronic toxicity and carcinogenicity, is a strong carcinogen. Illegal added the Rongalit in food the Rongalit can react with the test reagent to produce the purple product. The depth of purple color is proportional to the Rongalit residual of the sample. Therefore, the sample solution of rice bean, etc. added to the reagent, the reaction if present clear purple, indicating that this sample may be added Rongalit, The proposed method is use the acetylacetone to do the quantitative experiments further. Protein, fat, amino acids, sugars, acetaldehyde, propionaldehyde, methanol, ethanol, sulfate, sulphurous acid (hydrogen) salt and sulfur dioxide and other food components or structural analogues do not interfere with this test method. 

Specification: 100 times.

Storage: normal temperature, avoid from sunlight.

Packing: test solution A: 1 bottle, test solution B: 1 bottle, test solution C: 1 bottle.

Period validity: 6 months.

Usage

1. Take a small amount of the sample into the 10ml beaker (about l / 3 cup), slightly cut into pieces, then add the same amount of clean tap water, soak 10-20 minutes, during which stirring several times.

2. Add one drop of test solution A and one drop of test solution B to the hole of multihole colorimetric cylinder, and then use 0.5ml straw to draw 0.5ml (about 10 drops) of the percolate or soaking to the hole. Shake and mix it (preferably rabbling mix). After one minute add one drop of test solution C to the hole, and observe the color changing, refer the color card to judge the results.

Results judgment

If the response results of the solution was colorless or yellow, indicating that the samples were not polluted by formaldehyde (formalin), if the reaction results showed a purple solution, indicating that the sample matrix soaked in formaldehyde (formalin), the darker the higher content, if the color was very pale purple, no one is recommended as added formaldehyde (formalin) or extend the sample extraction and reaction time, and do test again.

Announcements

1. During the detection, the test solution A and test solution B should be mixed enough with the sample solution in the multihole of colorimetric cylinder, otherwise the test result may not appear perfect even produce false negative result.

2. After each time using multihole colorimetric cylinder and other containers, should dry the liquid of the inter hole and clean it three times with the water, then dry it for standby.

3. Stored reagents Long times, first, use the pure water do the blank sample, if the blank sample appear purple after added test solution, then should stop using it.