Abstract

The present study suggested three different highly sensitive luminescent systems based on the employment of silver nanoparticles (NPs), copper oxide nanoparticles and gold nanoparticles in the presence of micellar medium sodium dodecyl sulfate (SDS) for the detection of ascorbic acid in some fruit juices. The fluorescence spectral behavior of ascorbic acid was detected at λ_em of 420 nm after λ_ex at 350 nm in the presence of acetate buffer (pH 3). Under optimized experimental conditions, the suggested spectroflourimetric systems displayed excellent linearity over concentration ranges of 1.0 × 10^–9–1.0 × 10^–2, 1.0 × 10^–7–1.0 × 10^–3 and 1.0 × 10^–6–1.0 × 10^–3 M with lower limits of detection of 1.0 × 10^–10, 5 × 10^–8 and 5 × 10^–7 M for SDS−AgNPs, SDS−CuONPs and SDS−AuNPs systems, respectively. The suggested approaches were successfully used to detect ascorbic acid in its bulk powder and in some commercial fruit juices.

中文翻译：

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纳米颗粒/十二烷基硫酸钠的简便双重增强模式用于荧光检测商业果汁中的维生素C

摘要

本研究建议在胶束介质十二烷基硫酸钠（SDS）存在下使用银纳米颗粒（NPs），氧化铜纳米颗粒和金纳米颗粒，以检测某些果汁中的抗坏血酸，从而建立三种不同的高灵敏度发光系统。检测在λ抗坏血酸的荧光光谱行为_EM的λ后420nm处_的前，在350纳米的乙酸盐缓冲液（pH为3）的存在。在优化的实验条件下，建议的分光光度法系统在1.0×10 ^–9 –1.0×10 ^–2，1.0 ×10 ^–7 –1.0×10 ^–3的浓度范围内表现出出色的线性和1.0×10 ^-6 -1.0×10 ^-3米，检测的1.0×10的下限^-10，5×10 ^-8〜5×10 ^-7 M表示SDS-的AgNPs，SDS-CuONPs和SDS-的AuNP系统， 分别。所建议的方法已成功用于检测散装粉末和某些商业果汁中的抗坏血酸。