Silva, Ricardo Bettencourt daTrancoso, Maria AscensãoTeixeira, P. AlexandraOliveira, Cristina M. R. Ramiro deMosca, Alice I. de JesusDias, Florbela A. do SacramentoCamões, M. Filomena G. F. Crujo2020-04-012020-04-012019Silva, Ricardo Bettencourt da... [et.al.] - Measurement of total reactive phosphorus in natural water by molecular spectrophotometry (SMEWW 4500-P D). In: Traceability, Validation and Measurement Uncertainty in Chemistry: Practical Examples. N. Hrastelj and R. Bettencourt da Silva (eds), Switzerland: Springer Nature, Vol. 3, 2019, p. 1-20978-3-030-20346-7http://hdl.handle.net/10400.9/3228ABSTRACT: Phosphorus occurs in natural waters almost solely as phosphates.engNatural waterPhosphorus activityMeasurementSpectrophotometryMeasurement of total reactive phosphorus in natural water by molecular spectrophotometry (SMEWW 4500-P D)book part1007/978-3-030-20347-4