Modelling the spectral absorption of tripton using exponential and hyperbolic models

摘要

The optical properties of tripton, and the correlation between the absorption coefficient and tripton concentration, were investigated based on a large dataset of 727 samples, collected from different regions of shallow Lake Taihu, in China, from July 2004 to April 2007. Four models describing tripton absorption spectra in the visible domain (400-700 nm) were examined to find the optimal model. The conventional single exponential model performed the poorest. Statistically, the most 'useful' model was the hyperbolic model; judged by the root mean square error (RMSE) and the magnitude of the F statistic from an analysis of variance, this was found to give a closer fit for the measured absorption (70.1% reduction in RMSE and 449.7% increase in F value) than did the simple exponential model method. The mean Sa value derived for the hyperbolic model was 5.98 ± 0.30 nm"1, with a very small coefficient of variation of 5.0%. Significant linear correlations were found between a