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Coliform Presence/Absence (P/A) Vialis used for qualitative detection of feacal contamination in drinking water. The test vial is widely used for water quality testing at field and has been used by different national and international agencies for water quality testing activities.
P/A Vial was developed in order to introduce a simple and low-cost method for determination of faecal contamination in drinking water qualitatively. The vial is able to detect presence of coliform bacteria within 48 hours of retention time.
If the water sample contains any form of feacal contamination, the color of the sample would turn black after certain period of time. If it is absent, there would be no color change. PA vial can be used in preliminary stage to check for presence of coliform contamination. For more specific result, a microbiological testing is suggested.
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