New block-grafted anion exchanger for environmental water analysis by ion chromatography

New block-grafted anion exchanger for environmental water analysis by ion chromatography

The IonPac AS14A is a recently developed stationary phase that was produced using a new block-grafting technique, which enables the preparation of high-water-content anion exchangers with excellent peak shape and good chromatographic efficiency. The performance of this column for the analysis of ino...

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Bibliographic Details
Published in:Journal of Chromatography A Vol. 920; no. 1; pp. 51 - 60
Main Authors: Jackson, P.E, Thomas, D.H, Donovan, B, Pohl, C.A, Kiser, R.E
Format: Journal Article Conference Proceeding
Language:English
Published: Amsterdam Elsevier B.V 22-06-2001
Elsevier
Subjects:
Analysis methods
Analytical chemistry
Anion Exchange Resins
Applied sciences
Chemistry
Chromatographic methods and physical methods associated with chromatography
Chromatography, Ion Exchange - methods
Drinking water and swimming-pool water. Desalination
Exact sciences and technology
Inorganic anions
Natural water pollution
Other chromatographic methods
Other wastewaters
Pollution
Reproducibility of Results
Wastewaters
Water - analysis
Water treatment and pollution
Environmental analysis
Anion exchangers
Water analysis
Stationary phases, LC
Inorganic anions
Phosphates
Drinking water
Graft copolymer
Nitrites
Anionic resin
Nitrates
Experimental study
Sulfates
Electrochemical detector
Waste water
Ion chromatography
Inorganic anion
Conductometry
Halides
Surface water
Water pollution
Block copolymer
Stationary phase
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Description
Summary:The IonPac AS14A is a recently developed stationary phase that was produced using a new block-grafting technique, which enables the preparation of high-water-content anion exchangers with excellent peak shape and good chromatographic efficiency. The performance of this column for the analysis of inorganic anions was compared to that obtained using an IonPac AS4A column, which is specified in US Environmental Protection Agency Method 300.0, in addition to another commonly used alternative; the AS14 column. The AS14A column is available in two different formats; 250×4 mm I.D. (7.0 μm diameter particle) and 150×3 mm I.D. (5.5 μm diameter particle). The IonPac AS14A (in 4 mm I.D. format) was found to provide similar performance to the AS14 column with increased peak efficiency and better pH stability and is a suitable alternative for the analysis of anions in moderate- to high-ionic-strength samples. The IonPac AS14A (in 3 mm I.D. format) provides comparable run times to the AS4A column with better overall peak selectivity and improved fluoride resolution, hence this column would be a suitable column to substitute in place of either the AS4A or AS14 columns for the analysis of inorganic anions in low- to moderate-ionic-strength environmental waters. The AS14A column used with an Atlas electrolytic suppressor provides equivalent method detection limits to those obtained when using a micromembrane suppressor but with the operational convenience of a self-regenerating suppressor.
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ISSN:0021-9673
DOI:10.1016/S0021-9673(00)01225-5