Which type of bottle is used in bacteriological sampling to neutralize chlorine?

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Prepare for the ADEQ Water Treatment Grade 4 Test. Study with flashcards and multiple-choice questions, with each question offering hints and explanations. Ace your exam!

Multiple Choice

Which type of bottle is used in bacteriological sampling to neutralize chlorine?

Explanation:
When collecting water samples for bacteria analysis, residual chlorine can continue to kill organisms after the sample is drawn, leading to inaccurate results. To prevent that, the bottle includes a neutralizing agent that stops chlorine from acting right away. Sodium thiosulfate does this effectively by reacting with chlorine species to render them non-disinfecting, preserving the true bacterial content of the sample until lab analysis. Other options either don’t neutralize chlorine, add chlorine, or contaminate the sample, so they wouldn’t give an accurate result.

When collecting water samples for bacteria analysis, residual chlorine can continue to kill organisms after the sample is drawn, leading to inaccurate results. To prevent that, the bottle includes a neutralizing agent that stops chlorine from acting right away. Sodium thiosulfate does this effectively by reacting with chlorine species to render them non-disinfecting, preserving the true bacterial content of the sample until lab analysis. Other options either don’t neutralize chlorine, add chlorine, or contaminate the sample, so they wouldn’t give an accurate result.

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