Sequential injection system exploring the standard addition method for phosphate determination in high salinity samples: interstitial, transitional and coastal waters

Mesquita, Raquel  Beatriz Ribeiro; Santos, Inês Carvalho; Bordalo, Adriano Agostinho; Rangel, António Osmaro Santos Silva

http://hdl.handle.net/10400.14/10024

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Authors

Mesquita, Raquel Beatriz Ribeiro

Santos, Inês Carvalho

Bordalo, Adriano Agostinho

Rangel, António Osmaro Santos Silva

Abstract(s)

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 multireflective flow cell coupled to a light emitting diode, enabling the minimization of the schlieren effect. The developed system gave a LOD of 0.3 mmol P L 1 and LOQ of 1.1 mmol P L 1 with a sample consumption of 125 mL. A determination rate of about 30 h 1 was obtained, and the developed method was effectively applied to interstitial, transitional and coastal waters.

Description

Technical Note

URI

http://hdl.handle.net/10400.14/10024

Citation

MESQUITA, Raquel ...[et al.] - Sequential injection system exploring the standard addition method for phosphate determination in high salinity samples: interstitial, transitional and coastal waters. Analytical Methods. ISSN 1759-9679. Vol. 4, n.º 5 (2012), p. 1452-1457.