Simultaneous Voltammetric Determination of Benzene, Toluene and Xylenes (BTX) in Water Using a Cathodically Pre‐treated Boron‐doped Diamond Electrode,Electroanalysis

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Simultaneous Voltammetric Determination of Benzene, Toluene and Xylenes (BTX) in Water Using a Cathodically Pre‐treated Boron‐doped Diamond Electrode
Electroanalysis ( IF 2.7 ) Pub Date : 2018-12-14 , DOI: 10.1002/elan.201800661
Geraldo Garcia de Freitas Junior ₁ , Tayla M. Florêncio ₁ , Ricardo J. Mendonça ₁ , Giancarlo R. Salazar‐Banda ₂ , Robson T. S. Oliveira ₁

Affiliation

An electrochemical method for the simultaneous determination of benzene, toluene and xylenes (BTX) in water was developed using square‐wave voltammetry (SWV). The determination of BTX was carried out using a cathodically pre‐treated boron‐doped diamond electrode (BDD) using 0.1 mol L⁻¹ H₂SO₄ as supporting electrolyte. In the SWV measurements using the BDD, the oxidation peak potentials of the total xylenes‐toluene and toluene‐benzene couples, present in ternary mixtures, display separations of about 100 and 200 mV, respectively. The attained detection limits for the simultaneous determination of benzene, toluene and total xylenes were 3.0×10⁻⁷, 8.0×10⁻⁷ and 9.1×10⁻⁷ mol L⁻¹, respectively. The recovery values taken in ternary mixtures of benzene, toluene and total xylenes in aqueous solutions are 98.9 %, 99.2 % and 99.4 %, respectively.

中文翻译：

阴极预处理硼掺杂金刚石电极同时伏安法测定水中的苯，甲苯和二甲苯（BTX）

使用方波伏安法（SWV）建立了一种同时测定水中苯，甲苯和二甲苯（BTX）的电化学方法。BTX的测定使用阴极预处理的掺硼金刚石电极（BDD），使用0.1 mol L ^-1 H ₂ SO ₄作为支持电解质。在使用BDD进行的SWV测量中，三元混合物中总的二甲苯-甲苯和甲苯-苯对的氧化峰电位分别显示出约100和200 mV的分离度。同时测定苯，甲苯和总二甲苯的检测限为3.0×10 ^-7，8.0 ×10 ^-7和9.1×10 ^-7 mol L^-1。水溶液中苯，甲苯和二甲苯的三元混合物的回收率分别为98.9％，99.2％和99.4％。

更新日期：2018-12-14

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