2017
DOI: 10.2116/analsci.33.1363
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Internal Standard-Amplitude Modulated Multiplexed Flow Analysis

Abstract: A new concept of flow analysis, internal standard-amplitude modulated multiplexed flow analysis, is proposed. A proof of concept was verified by applying it to the determination of ferrous ion (Fe 2+ ) by 1,10-phenanthroline (o-Phen) spectrophotometry. The flow rates of sample solutions containing Methylene Blue (MB) as an internal standard substance were sinusoidally varied at different frequencies. The solutions were merged with a color reagent (o-Phen) solution, while the total flow rate was held constant. … Show more

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Cited by 5 publications
(2 citation statements)
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“…The spectrophotometric methods have been commonly used for the analysis of iron content such as 2,2′-bipyridyl and 2,2′,2″-terpyridyl 4,7-diphenyl-1 method (Moss and Mellon 1942), 4,7-diphenyl-1,10-phenanthroline method (Clark 1962), ferrozine method (Herrera et al 1989) and 1,10-phenanthroline method (Tamura et al 1974). The 1,10-phenanthroline method is used widely due to its high sensitivity (Tong et al 2016;Amonette and Matyáš 2016;Sumitomo et al 2017). The high concentration Fe 3+ affects the analysis of Fe 2+ in the process of colorimetry by the 1,10-phenanthroline method such as AMD samples, so F − is added into the solution to eliminate interferences (Herrera et al 1989).…”
Section: Introductionmentioning
confidence: 99%
“…The spectrophotometric methods have been commonly used for the analysis of iron content such as 2,2′-bipyridyl and 2,2′,2″-terpyridyl 4,7-diphenyl-1 method (Moss and Mellon 1942), 4,7-diphenyl-1,10-phenanthroline method (Clark 1962), ferrozine method (Herrera et al 1989) and 1,10-phenanthroline method (Tamura et al 1974). The 1,10-phenanthroline method is used widely due to its high sensitivity (Tong et al 2016;Amonette and Matyáš 2016;Sumitomo et al 2017). The high concentration Fe 3+ affects the analysis of Fe 2+ in the process of colorimetry by the 1,10-phenanthroline method such as AMD samples, so F − is added into the solution to eliminate interferences (Herrera et al 1989).…”
Section: Introductionmentioning
confidence: 99%
“…12 Sumitomo et al used an internal standard, the amplitude modulation of flow rates for sample solutions and fast Fouriertransformation signal processing, to determine two different samples simultaneously. 13 A validation of the method was demonstrated by using the determination of iron(II) with 1,10-phenanthroline. The stability of this unique system was improved by an internal standard solution (methylene blue).…”
mentioning
confidence: 99%