Q. Which of the following is used to detect gamma-emitting isotopes from drinking water sources? (M)

Electrophoresis

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Chromatography

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Spectrophotometer

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Scintillating counter

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Solution

The correct option is D Scintillating counter
Explanation:

A scintillation counter is an instrument for detecting and measuring ionizing radiation by using the excitation effect of incident radiation. The photocell counts the number of light pulses in a specific time period. Scintillation counters measure radioactivity in liquid samples, whereas autoradiography is used to locate radioactive molecules on gels or membranes.

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