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Assay of soluble reactive phosphorus at nanomolar levels in nonsaline waters
Author(s) -
Camarero Lluís
Publication year - 1994
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1994.39.3.0707
Subject(s) - phosphorus , chemistry , black phosphorus , environmental chemistry , environmental science , materials science , organic chemistry , optoelectronics
A simple, yet precise and accurate assay for SRP in low ionic strength water is described (mean error <0.03 nM, 99% C.I. < ±3 nM in the 10–100‐nM range for a 25–30‐fold concentration factor). The method relies on the use of chromatographic cartridges to concentrate the sample and the automated malachite green method to quantify SRP. For waters with a very low salt content, the concentration factor may be further increased by more than one order of magnitude by processing a higher volume of sample. Interferences of As 5+ and Si compounds are removed during the concentration step, which is rapid and clean.