1. Do not touch the paper when removing the dipstick reaction ends, to avoid contamination of paper, affect the test results
2. Remove the required number of test strips, the remaining strips sealed properly to prevent a high temperature or direct vision
3. The liquid sample PH value should be between 5-9, requirement seems colorless or light-colored, color is too dark liquid pre-test, do first bleaching treatment.
4. Please read the operating instructions and precautions before use.