Quality control tests for spectrophotometers consist of checking stray light.

Question

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Quality control testing for spectrophotometry consists of checking:
·Wavelength accuracy
·Stray light
·Linearity
 Wavelength accuracy is ensured when the wavelength indicated on the control dial is the actual wavelength of light passed by the monochromator.This is checked with standard absorbing solution or filters with maximum absorbance of known wavelength.
 Stray light refers to any wavelengths outside the band transmitted by the monochromator.
 Linearity is demonstrated when a change in concentration results in a straight-line calibration curve,as discussed under Beer's law.

Quality Control Tests for Spectrophotometers Consist of Checking Stray Light