کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5136860 | 1494480 | 2017 | 6 صفحه PDF | دانلود رایگان |
- An ionic liquid-based copper(II) ion-selective electrode was developed.
- The proposed electrode had good selectivity and sensitivity.
- The measurement accuracy of the proposed electrode could be comparable to GF-AAS.
In this work, a copper(II) ion-selective electrode with an ionic liquid (IL), 1-(2-aminoethyl)-3-butylimidazolium bis(trifluoromethanesulfonyl)imide ([C4NH2C2im]NTf2), as active material has been developed. Parameters affecting the performance of the electrode, such as the dosage of the ILs, the amount of carbon nanotubes, and aqueous pH values, were investigated. The experimental results indicated that the optimal composition of the electrode filling material was 47.6% [C4NH2C2im]NTf2, 47.6% tetrabutylphosphonium bis(trifluoromethanesulfonyl)imide (TBPNTf2) and 4.8% carboxylic multi-walled carbon nanotubes (MWCNTs-COOH). Under the optimal conditions, the developed electrode exhibited a good linear response over the concentration range of 10â10-10â5 mol Lâ1 and had a low limit of detection, 7.9 Ã 10â11 mol Lâ1. No obvious interference from common metal ions was found. The proposed electrode was applied to determine copper (II) ion in food samples and the results were comparable to graphite furnace atomic absorption spectrometry (GF-AAS).
Journal: Journal of Food Composition and Analysis - Volume 62, September 2017, Pages 63-68