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Which of the following is the reference that is generally used in FTIR interferometer?

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Which of the following is the reference that is generally used in FTIR interferometer?

(a) Air

(b) NaCl solution

(c) Alcohol

(d) Base solution

I have been asked this question during a job interview.

My question is taken from Fourier Transform Infra-red Spectrometers topic in section Colorimetry and Spectrometry of Analytical Instrumentation

1 Answer

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Right answer is (a) Air

The best explanation: Air is generally used as the reference. It is scanned for about 20 to 30 times and the results are stored in a computer.

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