Question

Which of the following is the full scale range of Infrared spectroscopy method used for measurement of carbon monoxide?

(a) 0-2 ppm

(b) 0-500 ppm

(c) 0-1 ppm

(d) 0-50 ppm

I had been asked this question during an interview for a job.

This question is from Estimation of Carbon Monoxide topic in portion Pollution Monitoring Instruments of Analytical Instrumentation

Answer 1

Correct choice is (d) 0-50 ppm

For explanation I would say: The full scale range of Infrared spectroscopy method used for measurement of carbon monoxide is 0-50 ppm. It depends on the characteristic absorption of the CO molecule at a particular wavelength.