PVC membrane electrode based on triheptyl dodecyl ammonium iodide for the selective determination of molybdate(VI)

Wang, Jianguo; Wang, Lingling; Han, Yongqin; Jia, Jianbo; Jiang, Lili; Yang, Weiwei; Sun, Qiaohua; Lv, Hui

doi:10.1016/j.aca.2007.02.032

Cited by 4 publications

(1 citation statement)

References 26 publications

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“…The proposed electrodes has been used to measure molybdenum in ore samples and corrosion inhibitor samples [4,8].The sensors [4,9] are used in non-aqueous medium. However, in the above papers [4,[8][9][10] does not provide information on the impact of state molybdenum (VI) in aqueous solution to work of ISEs. In addition, the working range pHofISEs (5.0−7.0; 5.4−10.5; 5.8−10.9; 6−10) some doubt as acidic environment promotes hydrolytic and polycondensation processes in molybdate containsolutions.…”

Section: Issn: 2638-1532mentioning

confidence: 99%

A New Molybdate-selective electrode based on Higher quaternary Ammonium Salts

Matveichuk¹

2018

Madridge J Anal Sci Instrum

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Membrane composition of molybdate-selective electrodes based on higher quaternary ammonium salts has been optimized. It is found that the best analytical characteristics of electrodes are based on 3,4,5-tris-dodecyloxybenzyl) tetraoxyethyltrimethyl ammonium in chloride form (5% w/w) with the addition in membranes of the solvating additive (neutral carrier) − p-heptyl ester 4-trifluoroacetylbenzoic acid (TFABAHE, 20% w/w). Their analytical characteristics: low detection limits (1•10 −6 mol/l); logarithm selectivity coefficients relative to interfering chloride -1,-4, sulfate -0.8, bromide -0.7, tungstate -0.9 ions; working range of pH (8.5−9.5); slope of the electrode function (24.4 mV/decade) are determined. Sodium molybdate aqueous solutions has been studied with FT-IR spectrometry method at various pH. In sodium molybdate solutions at pH greater than 8.0-8.5 hydrolytic processes are mild. However, using a molybdate-selective electrodes is better to use freshly prepared solutions. This increases the reproducibility of the experimental results. The proposed electrode was employed to determine of molybdate ions of model water samples using the calibration plot method.

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