1 storage conditions: 2 ℃ ~ 30 ℃ dry place to keep away from light (2 ℃ ~ 8 ℃ preservation is better).

2 product validity: 2 ℃ ~ 30 ℃ dry place dark storage, valid for 24 months.

3 open bottle validity: after opening, the lid should be sealed, placed in 2 ℃ ~ 30 ℃ dry place protected from light, valid for 6 months.

 [Test method]]:

1. Open the sealing film, take out a piece of test paper, and cover the bottle cap immediately.

2. Immerse the reaction area of the test strip into the solution to be tested for 1-2 seconds, take out the test strip, and dip the excess water on it with paper.

3. After 1 minute, compare the reaction area of the test strip with the color of the color comparison card to determine the test value of the test solution.

4. The best control of colorimetric time is 60s. If the time is too long or too short, Read will be affected.

 [Note]]:

1. Please do not touch the reaction end of the test paper when taking out the test paper, so as not to pollute the test paper and affect the test results.

2. After taking out the required number of test strips, seal the remaining test strips and keep them away from light.

3. The liquid to be tested should be colorless or light-colored as much as possible. Before the liquid with too deep color is detected, activated carbon can be used for dehydration treatment. If the liquid to be tested is turbid, let it stand for a period of time, and then take the clear part for detection after precipitation.