Water analysis test strip

pHfor coliformssurface

1. Paste two pièces of wet coliform test paper on the testing samples surface,wait for 30 seconds. 2. Take down the testing pape;put it into the transparent bag;seal the bag 3. Place the bag fiat for 48 hours at around 25°C or 24 hours at 37°C. Observe the results. PRECAUTIONS 1. The paper should be stored dry and away from light to avoid product detérioration and affecting the test results. 2.lf there is discoloration or moisture absorption on the appearance of the paper, it should be stopped from use to avoid false positive results. 3. The surface of the test samples should not be acidic, its pH should be between 7.0-7.4, beyond this range, it will affect the testing result. 1 .During the testing period, if yellow spots are found on the paper or ail the paper turns yellow, it is considered positive, indicating that the sample contains a coliform group. 2. If it displays purple red, itys négative, indicating that the sample does not contain coliform bacteria.