Abstract Electrochemical behavior of a plant growth stimulator 1-naphthaleneacetic acid (NAA) was firstly studied using a boron doped diamond electrode. It was found that NAA provided two irreversible anodic signals about the potential values of +1450 and +1630 mV, respectively, in an acidic medium. Products of the observed electrode reaction were identified using gas chromatography–mass spectrometry (GC–MS) and nuclear magnetic resonance (1H NMR) techniques. Based on the obtained results, the oxidation mechanism of studied compound was firstly proposed. Subsequently, voltammetric method for NAA determination was developed with the following statistical parameters: LOD = 0.09 μg mL−1 and RSD11 = 2.1% (10.8 μg mL−1). Moreover, this work brings approach for analysis of stimulators mixtures for the first time as well. The proposed method allows the determination of NAA, IBA, and IAA in mixed formulations without application of any sophisticated separation techniques. This new method was finally applied for NAA determination in commercially available herbicide preparation.

中文翻译：

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植物生长刺激剂1-萘乙酸的电化学行为及其掺硼金刚石电极伏安法测定

摘要 首次使用掺硼金刚石电极研究了植物生长刺激剂 1-萘乙酸 (NAA) 的电化学行为。发现 NAA 在酸性介质中提供了两个不可逆的阳极信号，分别约为 +1450 和 +1630 mV 的电位值。使用气相色谱-质谱 (GC-MS) 和核磁共振 (1H NMR) 技术鉴定观察到的电极反应的产物。基于所得结果，首次提出了研究化合物的氧化机理。随后，使用以下统计参数开发了用于 NAA 测定的伏安法：LOD = 0.09 μg mL-1 和 RSD11 = 2.1% (10.8 μg mL-1)。此外，这项工作也首次为刺激剂混合物的分析提供了方法。所提出的方法允许在不应用任何复杂的分离技术的情况下测定混合配方中的 NAA、IBA 和 IAA。这种新方法最终用于测定市售除草剂制剂中的 NAA。