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首页> 外文期刊>Electroanalysis >Pb(II) selective potentiometric sensor based on 4-tert-butylcalix[4]arene in PVC matrix
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Pb(II) selective potentiometric sensor based on 4-tert-butylcalix[4]arene in PVC matrix

机译:PVC基质中基于4-叔丁基杯[4]芳烃的Pb(II)选择性电位传感器

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摘要

Membranes of 4-tert-butylcalix[4]arene (1) as an electroactive material, sodium tetraphenyl borate (NaTPB) as an anion excluder, and dibutyl phthalate (DBP) as solvent mediator in poly(vinyl chloride) (PVC) matrix have been tried for lead-selective sensor. The best performance was exhibited by the membrane having the composition 2:1: 100:200 (1: NaTPB: DBP: PVC). This sensor works well in the concentration range 1.1 x 10(-5)-1.0 x 10(-1) M with a Nernstian slope (30.0 +/- 1.0 mV/decade of activity). The working pH range of the sensor is 2.1 - 4.0 and it shows good selectivity for Pb(II) over other mono-, bi- and trivalent cations which are reported to cause interference in the working of other sensors. It works well in partially nonaqueous medium up to 30% (v/v) (methanol, ethanol and acetone) and exhibits a fast response time (11 s). The assembly could be used for six months without any change in potentials. The sensor has successfully been used as an indicator electrode in the potentiometric titration of Pb(II) against EDTA. [References: 25]
机译:在聚(氯乙烯)(PVC)基质中,以4-叔丁基杯[4]芳烃(1)作为电活性材料,四苯基硼酸钠(NaTPB)作为阴离子排斥剂和邻苯二甲酸二丁酯(DBP)作为溶剂介体的膜具有已尝试用于铅选择性传感器。具有组成为2:1:100:200(1:NaTPB:DBP:PVC)的膜表现出最好的性能。该传感器在1.1 x 10(-5)-1.0 x 10(-1)M的浓度范围内具有Nernstian斜率(30.0 +/- 1.0 mV /活性的十年)效果很好。传感器的工作pH范围为2.1-4.0,它对Pb(II)的选择性优于其他一价,二价和三价阳离子,据报道会干扰其他传感器的工作。它在高达30%(v / v)的部分非水介质(甲醇,乙醇和丙酮)中效果很好,并具有快速的响应时间(11 s)。该组件可以使用六个月而不会改变电位。该传感器已成功用作Pb(II)对EDTA的电位滴定中的指示电极。 [参考:25]

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