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Issue 11, 2016
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Simultaneous determination of tetrabutyl ammonium and tetrabutyl phosphonium in environmental water samples by solid phase extraction and ion chromatography

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Abstract

An ion chromatography method by solid-phase extraction which was used for the simultaneous determination of tetrabutyl ammonium ([TBA]+) and tetrabutyl phosphonium ([TBP]+) in environmental water samples was developed. The samples were first concentrated and purified through an SCX solid-phase extraction column, and eluted with 0.02 mol L−1 hydrochloric acid–98% methanol (v/v), then analyzed using a carboxylic acid base cation exchange column. The optimized chromatographic conditions were 3 mmol L−1 methanesulfonic acid–20% acetonitrile as the mobile phase, flow rate of 1.2 mL min−1 and a column temperature of room temperature. Under these conditions, [TBA]+ and [TBP]+ achieved baseline separation. The retention times of the two cations were 11 min and 14 min, the resolution between the peaks was 2.059. The recovery of solid-phase extraction reached 97.1%, the linear regression equations were y = 0.0142x − 0.0132 and y = 0.0195x − 0.0265, the correlation coefficients were r = 0.9996 and r = 0.9997, the detection limits (S/N = 3) were 0.502 mg L−1 and 0.448 mg L−1, the relative standard deviations (n = 5) of the retention times of [TBA]+ and [TBP]+ were 1.22%, 1.23% and of the peak areas were 0.24% and 0.25%, respectively. Recoveries were 94.8% to 103.2%. The method is accurate, rapid, sensitive and efficient for meeting the requirements for quantitative analysis.

Graphical abstract: Simultaneous determination of tetrabutyl ammonium and tetrabutyl phosphonium in environmental water samples by solid phase extraction and ion chromatography

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Article information


Submitted
11 Jan 2016
Accepted
18 Feb 2016
First published
19 Feb 2016

Anal. Methods, 2016,8, 2427-2433
Article type
Paper
Author version available

Simultaneous determination of tetrabutyl ammonium and tetrabutyl phosphonium in environmental water samples by solid phase extraction and ion chromatography

F. Liu and H. Yu, Anal. Methods, 2016, 8, 2427
DOI: 10.1039/C6AY00085A

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