pH Test Strips-pH 1-14- 4 packs 320PCS Test Paper Litmus Strips Tester for Saliva Urine Water Soil Testing Universal Application

Tip: 1.The paper shoe be stored in a dark and dry place. 2.Test paper cannot directly enter the solution. 3. Do not touch the test tube mouth, bottle mouth, catheter mouth and so on. 4. When measuring the pH of a solution, the test strip must not be moistened with distilled water in advance, because wetting the test strip corresponds to diluting the tested solution. This can result in inaccurate measurements.The correct method is to use a glass rod or dropper containing a solution to be tested to drip in the middle of the test paper. After 2-3 seconds, read the PH value by matching with the standard color, namely the PH value.