In this study, poly(3,4‐ethylenedioxythiophene) (PEDOT) and polyaniline (PANI) were electrodeposited via cyclic voltammetry (CV) on glass carbon electrode (GCE) layer by layer. The prepared electrode (GCE/PEDOT/PANI) was used for the simultaneous sensitive determination of ascorbic acid (AA), dopamine (DA) and uric acid (UA) at different oxidation potentials. The peak distances of AA and DA, DA and UA, AA and UA were 216 mV, 104 mV, 320 mV, respectively. For individual detection of AA, DA and UA, the linear ranges were 1×10⁻⁴‐1×10⁻² M, 3×10⁻⁵‐1×10⁻³ M and 7×10⁻⁷‐1×10⁻⁴ M with detection limits of 2.42×10⁻⁵ M, 4.58×10⁻⁶ M and 2.38×10⁻⁷ M (S/N=3), respectively. For simultaneous detection of AA, DA, and UA, the linear response ranges were 1×10⁻⁴‐1×10⁻³ M, 3×10⁻⁴‐1×10⁻² M, and 3×10⁻⁶‐1×10⁻⁴ M with detection limits of 6.91×10⁻⁵ M, 3.66×10⁻⁵ M and 4.13×10⁻⁷ M (S/N=3), respectively. The GCE/PEDOT/PANI displayed good selectivity, reproducibility and storage stability, and was further applied to the detection of AA, DA, and UA in 5% normal human serum samples.

中文翻译：

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三维网络纳米结构PEDOT / PANI的电沉积同时测定伏安酸，多巴胺和尿酸

在这项研究中，通过循环伏安法（CV）在玻璃碳电极（GCE）上逐层电沉积聚（3,4-亚乙二氧基噻吩）（PEDOT）和聚苯胺（PANI）。所制备的电极（GCE / PEDOT / PANI）用于同时测定不同氧化电位下的抗坏血酸（AA），多巴胺（DA）和尿酸（UA）。AA和DA，DA和UA，AA和UA的峰距分别为216 mV，104 mV和320 mV。为AA，DA和UA的单个检测时，线性范围为1×10 ^-4 -1×10 ^-2 男，3×10 ^-5 -1×10 ^-3  M和7×10 ^-7 -1×10 ^{- 4}  M，检测极限为2.42×10 ^-5  M，4.58×10 ^-6  M和2.38×10^-7  M（S / N = 3）。为了同时检测AA，DA和UA，线性响应范围为1×10 ^-4 -1×10 ^-3  M，3×10 ^-4 -1×10 ^-2  M和3×10 ^-6 -1 ×10 ^-4  M，检测极限分别为6.91×10 ^-5  M，3.66×10 ^-5  M和4.13×10 ^-7  M（S / N = 3）。GCE / PEDOT / PANI具有良好的选择性，重现性和储存稳定性，并进一步用于检测5％正常人血清样品中的AA，DA和UA。