Checking the bacterial contamination in drinking …
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Posted by Kavi Sharma 5 years, 5 months ago
- 2 answers
Kavi Sharma 5 years, 5 months ago
Checking the bacterial in drinking water by sulphide ions
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Yogita Ingle 5 years, 5 months ago
The Sulphide ion test is the most common test that is used for checking any bacterial contamination in drinking water. Since even a small concentration of sulphide ion (0.01 mg/L) in the water makes it unfit for culture and consumption, it is important to check and test the presence of sulphide ion because it is very poisonous.
The simple and most common sulphide test is as follows:-
The water which has to be tested is filled in a test tube and a strip of H₂S is placed inside the tube. This test tube is then incubated for up to 14 - 16 hours at a temperature of 35°C. In case the strip turns into black, it indicates the presence of sulphide ion in the water and therefore, it is considered unsafe and unfit for consumption.
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