Examination of the factors affecting phosphorous measurement by the UV-VIS

The aims of the study were to examine (1) effect of high P contents on the correlation coefficient between absorbance and P concentration, (2) effects of time duration including storage time and duration since addition of colordeveloping reagent, and (3) effects of the presences of silicate, nitrite, and chromium on P absorbance of the UV-Vis at 882-nm wavelength.