High Capacity Anion-Exchange Resin as a Solid-Phase Extraction for Determination of Methylphosphonic Acid

A highly sensitive and accurate method for the preconcentration and determination of ultratrace amounts of methylphosphonic acid (MPA) in water samples is proposed. The method is based on the solid phase extraction with an ion exchange anion resin. The high capacity anion-exchange was prepared from...

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Bibliographic Details
Published inSeparation science and technology Vol. 45; no. 16; pp. 2363 - 2367
Main Authors Maddah, B., Motahari, A., Moghimi, A.
Format Journal Article
LanguageEnglish
Published Taylor & Francis Group 01.11.2010
Subjects
2,3,4-tris((dimethyl amino)methyl)phenol
Cartridges
Chlorides
Computing time
Eluents
Enrichment
Extraction
ion-exchange
nerve agent
Polymers
polyvinylbenzyl chloride
Resins
solid phase extraction
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Summary:A highly sensitive and accurate method for the preconcentration and determination of ultratrace amounts of methylphosphonic acid (MPA) in water samples is proposed. The method is based on the solid phase extraction with an ion exchange anion resin. The high capacity anion-exchange was prepared from the reaction of polyvinylbenzyl chloride and 2,3,4-tris((dimethyl amino)methyl)phenol in dioxane. The ion-exchange capacity was estimated by the potentiometric titrations and calculated as 8.6 meq/g-dry. The extraction efficiency and the influence of the type and least amount of eluent for the stripping of MPA from the cartridge, pH, flow rates of sample solution and eluent, resin stability and reproducibility, and the breakthrough volume were evaluated. The limit of detection of the method was 0.5 µg L −1 for MPA and also an enrichment factor of 100 was obtained.
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ISSN:0149-6395
1520-5754
DOI:10.1080/01496391003705672