Abstract

The need for test methods and materials for evaluating the performance of spectrophotometers has been increasing as the quality of these instruments improves. All too often the improper functioning of an instrument due either to improper use or adjustment may not be apparent to the user and may give rise to misleading results far inferior to those the instrument is capable of producing. In order to determine instrument performance readily it is highly desirable to have simple, rapid methods for evaluation of such properties as resolution, linearity, and stray light. Such testing procedures are being developed in this laboratory. Methods and materials for stray-light determination in ultraviolet spectrophotometers are given here. Absorbance measurements have been made on pure liquids and aqueous salt solutions which are readily available to serve as sharp cutoff-filters for this determination in the near- and far-ultraviolet regions.

© 1964 Optical Society of America

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