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Reverse flow injection analysis of nanomolar soluble reactive phosphorus in seawater with a long path length liquid waveguide capillary cell and spectrophotometric detection

Citation

Ma, J and Yuan, D and Zhang, M and Liang, Y, Reverse flow injection analysis of nanomolar soluble reactive phosphorus in seawater with a long path length liquid waveguide capillary cell and spectrophotometric detection, Talanta, 78, (1) pp. 315-320. ISSN 0039-9140 (2009) [Refereed Article]

Copyright Statement

Copyright 2008 Elsevier B.V.

DOI: doi:10.1016/j.talanta.2008.11.017

Abstract

A novel reverse flow injection analysis method coupled with a liquid waveguide capillary cell (LWCC) and spectrophotometric detection for the determination of nanomolar soluble reactive phosphorus in seawater was established. Reagent was injected into the sample stream and detected in a 2-m path length LWCC with detection wavelength set at 710nm. Experimental parameters, including the reagent concentration, the injection volume, the flow rate and the length of the mixing coil, were optimized based on univariate experimental design. The interference of silicate and arsenate were also investigated. Under optimized conditions, the linearity and the detection limit of the proposed method were found to be 0165.0nM and 0.5nM, which was estimated to be three times the standard deviation of the measurement blanks (n=9). The relative standard deviations for the determination of 24.7 and 82.5nM samples were 1.54% and 1.86% (n=9), respectively. Three seawater samples were analyzed with recoveries ranging from 87.8% to 101.8%. Using the Student's t-test at the 95% confidence level, the results of the proposed method and a segmented flow analyzer reference method for determination of the two samples showed no significant difference. The proposed method had the advantages of being less reagent consuming, more sensitive and with higher throughput (15h−1).

Item Details

Item Type:Refereed Article
Keywords:reverse flow injection analysis, liquid waveguide capillary cell, seawater, nanomolar soluble reactive phosphorus
Research Division:Chemical Sciences
Research Group:Analytical Chemistry
Research Field:Flow Analysis
Objective Division:Environment
Objective Group:Physical and Chemical Conditions of Water
Objective Field:Physical and Chemical Conditions of Water in Marine Environments
Author:Zhang, M (Dr Min Zhang)
ID Code:104702
Year Published:2009
Web of Science® Times Cited:32
Deposited By:Chemistry
Deposited On:2015-11-18
Last Modified:2016-03-30
Downloads:0

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