The use of on-line UV photoreduction in the flow analysis determination of dissolved reactive phosphate in natural waters
Edward A Nagul, Ian D McKelvie, Spas D Kolev
TALANTA | ELSEVIER SCIENCE BV | Published : 2015
A highly sensitive flow analysis manifold for rapid determination of dissolved reactive phosphate was developed which uses ethanol and UV light to reduce phosphomolybdic acid, instead of the reactive and short-lived chemical reductants typically employed in molybdenum blue chemistry. This reaction is impractical to perform reproducibly in batch mode, yet is very simple to handle in a flow analysis system and uses a single, very long-lived reagent solution. Interference from common inorganic anions and organic phosphorus species was minimal, and good spike recoveries for a range of sample matrices were obtained. The proposed flow analysis system is characterised by a limit of detection of 1.3..View full abstract
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Awarded by Australian Research Council (ARC Linkage Project)
We are grateful to the Australian Research Council (ARC Linkage Project LP100100800) for financial support. E. Nagul is grateful to the University of Melbourne for the award of a postgraduate scholarship.