Improved electroanalytical characteristics for flumetralin determination in the presence of surface active compound.

IF 1.7 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Monatshefte Fur Chemie Pub Date : 2017-01-01 Epub Date: 2017-02-08 DOI:10.1007/s00706-017-1918-8

Dariusz Guziejewski, Sylwia Smarzewska, Radovan Metelka, Agnieszka Nosal-Wiercińska, Witold Ciesielski

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Abstract

Abstract: The use of square wave voltammetry (SWV) and square wave adsorptive stripping voltammetry (SWAdSV) in conjunction with a cyclic renewable silver amalgam film electrode for the determination of flumetralin is presented. Poor separation of two overlapped reduction peaks is significantly improved when hexadecyltrimethylammonium bromide is used as a component of the supporting electrolyte solution (together with BR buffer pH 9.5). The SW technique parameters were investigated and found optimal as follows: frequency 50 Hz, amplitude 40 mV, and step potential 5 mV. Accumulation time and potential were studied to select the optimal conditions in adsorptive voltammetry. The analytical curve was linear for the flumetralin concentration range from 1.0 × 10^-6 to 1.0 × 10^-5 mol dm^-3 and from 5.0 × 10^-9 to 1.0 × 10^-7 mol dm^-3 for SWV and SWAdSV, respectively. Detection limit of 6.5 × 10^-10 mol dm^-3 was calculated for accumulation time 60 s at -0.2 V. The repeatability of the method was determined at a flumetralin concentration level equal to 5.0 × 10^-9 mol dm^-3 and expressed as %RSD = 5.0% (n = 6). The proposed method was applied and validated successfully by studying the recovery of herbicide content in spiked environmental samples.

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在存在表面活性化合物的情况下改进氟美曲林测定的电分析特性。

摘要：本文介绍了方波伏安法（SWV）和方波吸附剥离伏安法（SWAdSV）与循环可再生银汞合金薄膜电极相结合测定氟美曲林的方法。当十六烷基三甲基溴化铵与 pH 值为 9.5 的 BR 缓冲溶液一起用作支撑电解质溶液时，两个重叠还原峰的分离效果明显改善。对 SW 技术参数进行了研究，发现最佳参数如下：频率 50 Hz，振幅 40 mV，阶跃电位 5 mV。研究了累积时间和电位，以选择吸附伏安法的最佳条件。对于 SWV 和 SWAdSV，氟美曲林的浓度范围分别为 1.0 × 10-6 至 1.0 × 10-5 mol dm-3，以及 5.0 × 10-9 至 1.0 × 10-7 mol dm-3，分析曲线均呈线性。方法的重复性是在氟美曲林浓度等于 5.0 × 10-9 mol dm-3 时测定的，以 %RSD = 5.0% 表示（n = 6）。通过研究加标环境样品中除草剂含量的回收率，成功地应用并验证了所提出的方法：

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Monatshefte Fur Chemie 化学-化学综合

CiteScore

3.70

自引率

5.60%

发文量

116

审稿时长

3.3 months

期刊介绍： "Monatshefte für Chemie/Chemical Monthly" was originally conceived as an Austrian journal of chemistry. It has evolved into an international journal covering all branches of chemistry. Featuring the most recent advances in research in analytical chemistry, biochemistry, inorganic, medicinal, organic, physical, structural, and theoretical chemistry, Chemical Monthly publishes refereed original papers and a section entitled "Short Communications". Reviews, symposia in print, and issues devoted to special fields will also be considered.