Publication:
Stopped-in-loop flow analysis system for successive determination of trace vanadium and iron in drinking water using their catalytic reactions

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Issued Date

2015

Resource Type

Article

File Type

application/pdf

ISSN

399140

DOI

10.1016/j.talanta.2015.07.006

Other identifier(s)

2-s2.0-84937598809

Rights Holder(s)

มหาวิทยาลัยศรีนครินทรวิโรฒ

Bibliographic Citation

Talanta. Vol 144, (2015), p.844-850

Suggested Citation

Ayala Quezada A., Ohara K., Ratanawimarnwong N., Nacapricha D., Murakami H., Teshima N., Sakai T. Stopped-in-loop flow analysis system for successive determination of trace vanadium and iron in drinking water using their catalytic reactions. Talanta. Vol 144, (2015), p.844-850. doi:10.1016/j.talanta.2015.07.006 Retrieved from: https://hdl.handle.net/20.500.14740/6123

Title

Stopped-in-loop flow analysis system for successive determination of trace vanadium and iron in drinking water using their catalytic reactions

Author(s)

Ayala Quezada A.
 Ohara K.
 Ratanawimarnwong N.
 Nacapricha D.
 Murakami H.
 Teshima N.
 Sakai T.

Abstract

An automated stopped-in-loop flow analysis (SILFA) system is proposed for the successive catalytic determination of vanadium and iron. The determination of vanadium was based on the p-anisidine oxidation by potassium bromate in the presence of Tiron as an activator to form a reddish dye, which has an absorption maximum at 510 nm. The selectivity of the vanadium determination was greatly improved by adding diphosphate as a masking agent of iron. For the iron determination, an iron-catalyzed oxidative reaction of p-anisidine by hydrogen peroxide with 1,10-phenanthroline as an activator to produce a reddish dye (510 nm) was employed. The SILFA system consisted of two peristaltic pumps, two six-port injection valves, a four-port selection valve, a heater device, a spectrophotometric detector and a data acquisition device. One six-port injection valve was used for the isolation of a mixed solution of standard/sample and reagent to promote each catalytic reaction, and another six-port injection valve was used for switching the reagent for vanadium or iron to achieve selective determination of each analyte. The above mentioned four-port selection valve was used to select standard solutions or sample. These three valves and the two peristaltic pumps were controlled by a built-in programmable logic controller in a touchscreen controller. The obtained results showed that the proposed SILFA monitoring system constituted an effective approach for the selective determination of vanadium and iron. The limits of detection, 0.052 and 0.55 μg L-1, were obtained for vanadium and iron, respectively. The proposed system was successfully applied to drinking water samples without any preconcentration procedures. © 2015 Elsevier B.V. All rights reserved.

Subject(s)

Catalysis
 Data acquisition
 Iron
 Potable water
 Potassium compounds
 Spectrophotometry
 Vanadium
 Catalytic reactions
 Data-acquisition devices
 Drinking water samples
 Flow analysis
 Pre-concentration procedures
 Selective determination
 Stopped-in-loop
 Vanadium determinations
 Iron analysis
 4-anisidine
 Aniline derivative
 Drinking water
 Hydrogen peroxide
 Iron
 Oxidizing agent
 Pyrophosphoric acid derivative
 Vanadium
 Catalysis
 Chemistry
 Devices
 Kinetics
 Oxidation reduction reaction
 PH
 Procedures
 Spectrophotometry
 Temperature
 Aniline Compounds
 Catalysis
 Diphosphates
 Drinking Water
 Hydrogen Peroxide
 Hydrogen-Ion Concentration
 Iron
 Kinetics
 Oxidants
 Oxidation-Reduction
 Spectrophotometry
 Temperature
 Vanadium

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URI

https://hdl.handle.net/20.500.14740/6123

Collections

Scopus: Year 1983-2021

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