【name say】:Guangfan test paper Extensive test strip PH test paper 

[Ginseng number】:Each book has 80 pieces, comes with its own standard color plate, and the measurement range is 1 to 14 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,             14 (14th level), accuracy is 1) Each box has 20 books, weighing about 150 grams; each box has 50 boxes, totaling 1,000 books, weighing about 8 cm catty

【Taste Card】:“SSS”Trial three cards

Correct usage method:

1. Detection solution
(1) Use a dropper to absorb the liquid to be tested, drop it on the pH test strip, and compare it with the colorimetric card within half a minute to read the pH;
(2) Use a glass rod to take the liquid to be tested, apply it to the pH test paper, and compare it with the colorimetric card within half a minute to read out the pH;
Do not immerse the pH test paper in the liquid to be tested, because immersion of the test paper in the liquid to be tested will cause the indicator to be lost, which will lead to inaccurate measured values. At the same time, the indicator will be lost, and the liquid to be tested will be contaminated.
2. Check the pH of the gas:
First wet the test paper with distilled water, stick it to one end of the glass rod, and then send it to the port of the container containing the gas to be tested, observe the color changes, and judge the properties of the gas.(The test strip cannot touch the wall of the device)

To detect the size of the pH value or the strength of acid and alkali, you can choose the pH Guangfan test strip or precision test paper.

The approximate color of the color comparison card:When the pH test paper encounters a solution with different acid and alkali, it shows different colors, which can determine the pH value of the solution with the standard comparison card comparison.
Qiaoji color: red (pH = 1 or 2), orange (pH = 3 or 4), yellow (pH = 5 or 6), green (pH = 7 or 8), green (pH = 9 or 10), blue(PH = 11 or 12), purple (pH = 13 or 14).

Due to the production of pH test strips and the influence of various factors such as the quality, environment, and temperature of the indicator, the standard PH test strip standard is fine -tuned than color card per batch. ThereforeBe sure to use the batch of the color card to compare.