Abstract (EN):
A sequential injection system for phosphate determination within a wide concentration range was developed for water samples with high salinity levels. The determination is based on molybdenum blue chemistry using the standard addition quantification method. The detection system included a multi-reflective flow cell coupled to a light emitting diode, enabling the minimization of the schlieren effect. The developed system gave a LOD of 0.3 mu mol P L-1 and LOQ of 1.1 mu mol P L-1 with a sample consumption of 125 mu L. A determination rate of about 30 h(-1) was obtained, and the developed method was effectively applied to interstitial, transitional and coastal waters.
Idioma:
Inglês
Tipo (Avaliação Docente):
Científica
Nº de páginas:
6