Instructions for Use of Industrial Alkali Quick Test Kit for Water Hair Aquatic Products

Product Number: YP-26

1. Method Principle

The pH value of water hair aquatic products soaked with industrial alkali is generally 8.0. This kit uses the principle that industrial alkali can make the acid-base indicator red and do not fade, so as to determine whether the alkaline water products have been soaked with industrial alkali.

2. Scope of Application

This kit is suitable for the rapid detection of industrial alkali in water hair aquatic products.

three, sample determination

water hair aquatic products soaking solution:

1, take a test paper, inserted into the water hair aquatic products soaking solution in 1-2 s, take out, and the standard colorimetric card reading pH value, if the pH value of 8.0 is no need for follow-up testing, if the pH value > 8.0 is a suspect sample, the next step of detection;

2, draw 1 ml of suspect sample in the colorimetric tube, add 1 drop of reagent A dropwise, shake well, at this time the colorimetric tube solution turns red, then add 3 drops of reagent B dropwise, shake vigorously for 1 minute, observe the color of the solution in the colorimetric tube, if fading occurs or the color becomes light, edible alkali is added, if the color remains unchanged, industrial alkali is added.

the determination of aquatic products:

1, take a test paper paste on the surface of aquatic products, so that the test paper is wet, compared with the standard colorimetric card to read the pH value, if the pH value is 8.0, no follow-up testing is required, if the pH value is > 8.0 It is a suspicious sample for the next step of testing;

2, weigh 2.0 g of shredded or minced suspicious sample in the sample cup, add 4 mL of pure water, shake and mix for 2 minutes.

Take 1 mL of supernatant in the colorimetric tube, add 1 drop of reagent A dropwise, shake well, at this time the solution turns red in the colorimetric tube, add 3 drops of reagent B dropwise, shake vigorously for 1 minute, observe the color of the solution in the colorimetric tube, if fading or light color occurs, sodium carbonate is added, if the color does not change, sodium hydroxide is added.

Fourth, Precautions

1, after adding reagent A dropwise, shake well and pay attention to observe the color depth of the solution, in order to judge whether the test result has a fading reaction;

2, when sampling, try to choose the water-based aquatic product immersion liquid as the test sample, and choose the water-based aquatic product as the test sample if the immersion liquid is not available.

5. Detection limit

. Detection limit of sodium hydroxide in this kit: 0.1 g/L.

6. Storage conditions and product valid period

1. Storage conditions: room temperature and dark storage

2, product valid period: 12 months

7. Kit composition

Serial number

Specifications

Composition

10 times/box

100 times/box

1

reagent A

1 bottles

1 bottles

2

reagent B

1 bottles

1 bottles

2 bottles

3

pH test paper

10 sheets

100

4

1 mL colorimeter

10

100

5

20 mL graduated sample cup

1

2

6

1 117277984