Y-Nitrate rapid test reagent

Product introduction

Application

It is widely used in the detection of various types of vegetables, fruit and food content of nitrate.

Detection principle

Nitrate in food with the reagent reacts with mauve product, the deeper the color, said in a sample of the nitrate content is higher, and the standard of comparison, it can be in a sample of nitrate whether are exceeded the semi quantitative results or not.

Specification: 50 times.

Storage: normal temperature, avoid from sunlight.

Packing: 1. One bottle of test reagent A.

            2. One bottle of test reagent B.

Period of validity: 12 months.

Method of use:

The fruit and vegetable samples

Washed and dried fruit and vegetable samples, take the edible portion to cut pieces and juicing.

The preparation of sample solution: take 1 drops of juice to add the 1ml of distilled water, shaking and dissolved. That is the sample solution.

Add 5 drops of sample solution to tube type bottle, and then add distilled water 5ml, then add 5 drops of testing solution A, shake the bottle. Add one level scoop detection solution B.

Pure into the bottle, shake to dissolved totally, stay for a moment and observe the color, after 5 minutes compare the sample color with the color card. From marked value of the similar color to find out the nitrate content of the fruit and vegetable samples.

General food

1. Weigh up 1 gram of sample and possible cut into small pieces, put into the sample cup, use plastic scale straw to join 10ml distilled water or pure water, placed more than 10 minutes, stirring or shaking the straw which is available to accelerate the extraction, taking supernatant is the sample solution.

The results of judgment

Comparison of samples and color cards color can roughly judge the nitrate content of the sample. If the sample color is deeper than the corresponding the value of color card, the content of nitrate in the sample may exceed the limits, must retest or sent to the laboratory for physical testing. Conversely, if the sample color is shallow more than the corresponding the value of color card, the content of nitrate in the sample may not exceed the limits, then the sample can be relieved edible

Announcement

After reagents used should be closed, detection of liquid A should be stored in the refrigerator or a cool and dry place to avoid the light. The detection reagent B should be stored in dry and sealed place.

During sampling, shall be taken the representative of the edible part, on nitrate concentration in excess of the samples is recommended to test again.

All the experimental water shall use distilled water.

After using, the entire experimental vessel was applied to rinse three times, then after rinsed with distilled water or pure water to dry for use.