Monte Carlo study of the scattering error of a quartz reflective absorption tube

A Monte Carlo model was used to study the scattering error of an absorption meter with a divergent light beam and a limited acceptance angle of the re ceiver. Reflections at both ends of the tube were taken into account. Calcu lations of the effect of varying optical properties of water as well as the receiver geometry were performed. A weighting function showing the scatter ing error quantitatively as a function of angle was introduced. Some cases of practical interest are discussed.