Theory of photometric errors applied to the design and evaluation of a high-performance filter photometer

We have applied a comprehensive theory of photometric errors to the design and evaluation of an inexpensive stabilized photometer. The photometer is described in terms of a group of modules, the characteristics of which are described in terms of their effect on specific error coefficients. Procedures described in this paper show how the principles described earlier [Clin, Chem. 20, 1028 (1974)] can be used to optimize the design of new instrumentation. Chemical data are included to verify the agreement between predicted and experimental results.