Generalized treatment of a stray radiant energy test method in absorption spectrometry

Abstract

The test method of Mielenz et al. used to determine the relative stray radiant energy (SRE) level in spectrophotometers is generalized for all sample cell to reference cell thickness ratios greater than unity. It is extended further to include situations where the required ‘cut-off’ solution is not transparent to the SRE. The experimental SRE value which ensued by applying the above method to a Shimadzu 260 ultraviolet/visible spectrophotometer is reconciled with the corresponding experimental values arising from two other SRE test methods.