Many friends don’t know much about whether test paper and water quality testing paper are reliable. Today, the editor will share it with you. I hope it can help everyone. Let’s take a look. Bar!
Contents of this article
- How to read fish tank water quality test paper
- Are formaldehyde test papers useful
- Are H1N1 flow test papers useful
- Standards of pH test paper
- Zijiang small ticket machine cannot print test paper
- Are water quality test papers reliable?
1. How to read fish tank water quality test paper
Tear off a piece of pH test paper, dip a glass rod into the water in the fish tank, and drop it on the test paper After a while, the color of the pH test paper will change. Compare the color of the pH test paper with the standard color. The one with the same or similar color is the pH value of the fish tank water.
2. Is formaldehyde testing paper useful
Formaldehyde testing paper is It is useful to a certain extent.
1. Formaldehyde is a toxic gas that can easily cause indoor air pollution. Using formaldehyde test paper can more intuitively detect indoor formaldehyde pollution and remind people Take prompt measures.
2. However, the results of formaldehyde test paper can be affected by many factors, such as temperature, humidity, etc. The accuracy of the test results is limited and cannot be completely relied on. This method is used to determine indoor air quality.
3. Therefore, in addition to using formaldehyde testing paper, effective indoor ventilation, plant purification and other methods should also be adopted to improve the indoor environment.
3. Is the A-flu test paper useful?
A-flu B The flow test paper is suitable for the auxiliary diagnosis of influenza A virus and influenza B virus. It usually takes 15-20 minutes to observe and display the results. The appearance of two bars indicates possible infection with influenza A virus.Type influenza virus or influenza B virus, a bar indicates no infection.
4. Standards for pH test paper
Less than 7 Acidic, anything greater than 7 is alkaline. Chemistry stipulates that any substance that releases hydrogen ions (symbol H) in solution is an acid, and any substance that accepts hydrogen ions is a base. Therefore, the acid is the donor of H, and the base is the acceptor of H. The pH is expressed by pH. The pH range of a normal person is between 7.35-7.4, with an average of 7.4, which is slightly alkaline. It is an alkaline constitution and a healthy constitution. If the pH value is below 7.35, it means the body has an acidic constitution, which is a sub-healthy state between health and disease.
5. Zijiang small ticket machine cannot print test paper
1. Check whether the paper in the ticket machine is placed correctly and whether the cover is pressed tightly.
2. There are usually two indicator lights of different colors on the ticket machine. If they stay on, it means it is normal. If they flash, it means the paper is not placed properly. Correct or the lid of the ticket machine is not pressed tightly.
3. There will be a round feed button on the small ticket machine. This button is the test paper ejection button. Pressing the paper ejection indicator proves that there is no problem with the machine itself. .
4. Unplug the USB cable connected to the computer and plug it in again, and try printing to see if the problem is solved.
6. Is water quality testing paper reliable?
1, 7 The accuracy of the 1-in-1 water quality test paper depends on the quality of the test paper and how it is used. If used with the correct method, the accuracy of the 7-in-1 water quality testing paper can reach more than 90%.
2. The 7-in-1 water quality test paper can detect pH value, chloride ions, sulfate, ammonia nitrogen, nitrate, active oxygen and total phosphorus in the water. 7 This indicator can effectively detect changes in water quality, so that timely measures can be taken to protect water resources.
This ends the introduction about whether test paper and water quality testing paper are reliable. I wonder if you found the information you need? If you want to know more about this, remember to bookmark and follow this site.
