In this work, a nanogold surface molecularly imprinted polymer spectral probe (AuNP@MIP) for selectively identifying ferrocyanide was prepared under microwave irradiation using nanogold as the core, ferrocyanide as the template ion, methacrylic acid as the monomer, and ethylene glycol dimethacrylate as the cross-linking agent. AuNP@MIP was found to produce a resonance Rayleigh scattering (RRS) peak at 370 nm. When potassium ferrocyanide (K₄Fe(CN)₆) was present, a AuNP@MIP–Fe(CN)₆ complex was formed, producing RRS-energy transfer (RRS-ET). With an increase in ferrocyanide concentration within a certain range, the RRS intensity at 370 nm decreased linearly, and the detection range was 0.02–0.40 μmol L⁻¹, with a detection limit as low as 0.006 μmol L⁻¹ ferrocyanide. This new method has the advantages of simplicity, rapidity, and selectivity when applied for the determination of K₄Fe(CN)₆ in table salt.

中文翻译：

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使用纳米金表面分子印迹聚甲基丙烯酸探针快速选择性 RRS 测定亚铁氰化物

本工作以纳米金为核心、亚铁氰化物为模板离子、甲基丙烯酸为单体、乙二醇二甲基丙烯酸酯为单体，在微波辐射下制备了一种选择性识别亚铁氰化物的纳米金表面分子印迹聚合物光谱探针（AuNP@MIP）。交联剂。 AuNP@MIP 被发现在 370 nm 处产生共振瑞利散射 (RRS) 峰。当亚铁氰化钾（K ₄ Fe(CN) ₆）存在时，形成AuNP@MIP-Fe(CN) ₆络合物，产生 RRS 能量转移（RRS-ET）。在一定范围内随着亚铁氰化物浓度的增加，370 nm处的RRS强度线性下降，检测范围为0.02~0.40 μmol L ^-1，检出限低至0.006 μmol L ^-1亚铁氰化物。该方法用于食盐中K ₄ Fe(CN) ₆的测定具有简单、快速、选择性强的优点。