Question

Which module consists of a pair of Perspex plates?

(a) The dialyzer module

(b) The recorder module

(c) The sampling module

(d) Heating bath module

This question was addressed to me in an interview for job.

This interesting question is from Skin Reflectance Oximeters in section Oximeters of Biomedical Instrumentation

Answer 1

Correct answer is (a) The dialyzer module

To elaborate: In analytical chemistry, it is often necessary to remove protein cells to obtain an interference-free analysis. This is accomplished by dialysis in the auto-analyzer. The dialyzer module consists of a pair of perspex plates, the mating surfaces of which are mirror grooved in a continuous channel, which goes in towards the centre, on itself and returns to the outside.