10 PCS 80 Strips PH Test Paper Indicator Litmus Paper Water Pollution Kit

Description

1. Product name: PH test paper
2. Packing method: Sealed with plastic film, each pack / 80 sheets with standard color card
3. Effective range: 1-14
4. Method of use: drop or smear the liquid to be tested on the PH test paper, it can be reflected and displayed almost without waiting, and then compared with the attached standard color chart to get the PH value.
5. How to use pH test paper 1-14
6. Step 1: Open the strip-shaped piece of paper exposed by the test bag, the paper sheet is pH test paper, and there are 1-14 color cards on the surface of the box.
7. Step 2: Remove the test strip and place it flat on a dry glass or plastic sheet (Note: the glass or plastic sheet must be dry and clean);
8. Step 3: Use a glass rod or pipette to take the test solution and drop it on one end of the test paper;
9. Step 4: After one second, the solution part of the test paper and the test paper produce a color change. At this time, compare with the standard color card and read the pH value. In the test, the lower the pH value, the stronger the acidity of the solution. When the pH value is 7, the solution is neutral, the greater the pH value, the stronger the solution's alkalinity;
10. Cosmetic test: Because the pH of the skin is about 6, it is a weak acid, so the pH of the cosmetic is about 6 so that it does not damage the skin pH balance, so the pH value is close to 6 without harming the skin. 6, ph is very good between 5 and 7), Cosmetics are applied on the test strip, and then the closest color is found by comparing the color chart, and the pH is obtained.
11. Test for amniotic fluid: The urine and vaginal discharge of most people are acidic, while the amniotic fluid is alkaline. (Take a vaginal secretion with a sterile cotton swab, apply it on a test paper, and compare the color chart to find the closest color, pH 7 The above indicates amniotic fluid; if it does not change color, it means that it is not amniotic fluid.)
12. Measure the pH of the human body, the saliva sticks to the test paper, compare the color card, find the closest color, and get the pH of the human body
13. Test urine pH: Urine stained on the test paper, urine stained on the test paper, compare the color card, find the closest color, and get the pH of the human body
14. Check the acidity and alkalinity 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 mouth of the container containing the gas to be measured, observe the color change and judge the nature of the gas. (The test paper cannot touch the wall of the device)
15. Used for pH testing of soils; Some plants require acidic or weakly acidic soils. It is necessary to measure the acidity of new soils or substrates that have been used for a long time!
16. Measurement method of soil pH (PH value): When measuring the pH value of the substrate, you can sample a little soil, put it in the bottom of the bowl, then add 4-6 drops of distilled water, and stir well. After it is still and clarified, immerse a part of the PH test paper in the clear solution, and then the test paper will change color. The pH value can be directly obtained by comparing the discolored test paper with the PH standard color chart.