Spectroelectrochemical Studies of Interactions between Vitamin A and Nanocolloidal Silver

Bogdan Tutunaru; Adriana Samide; Cristian Neamt?u; Cristian Tigae

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Spectroelectrochemical Studies of Interactions between Vitamin A and Nanocolloidal Silver

机译：维生素A与纳米胶体银相互作用的光谱电化学研究

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The electrochemical stability of retinyl palmitate (RP) known as Vitamin A in mixed water/ethylalcohol solutions containing NaCl or NaNO3, in the absence and presence of silver nanoparticles (nAg)was investigated by cyclic voltammetry (CV) recorded on platinum electrode. The chemical interactionbetween retinyl palmitate and silver nanoparticles was also studied using UV-Vis spectrophotometryapplied on the above mentioned media. The experimental results obtained from UV-Visspectrophotometry showed that in the presence of NO3- ions, weak RP-nAg interaction takes place,while in the presence of chloride ions a significant change in environment composition has beenhighlighted due to the occurrence of instantaneous RP-nAg interaction. The cyclic voltammetrydisplayed different shapes of cyclic voltammograms recorded on platinum electrode in water/alcoholsolutions containing RP and RPAg in the presence of NO3- ions compared to those recorded in Clpresence due to the specific interaction RP-nAg depending on the anion type. Thus, NO3- additionleads to mainly electrochemical interaction compared to Cl- presence that favors chemical RP-nAginteraction. Based on the cyclic voltammetry results obtained in the presence of NO3- ions, theelectrochemical decomposition mechanism of Vitamin A was proposed.

机译：通过在铂电极上记录的循环伏安法（CV）研究了在不存在和存在银纳米颗粒（nAg）的情况下，在含有NaCl或NaNO3的混合水/乙醇溶液中，称为维生素A的棕榈酸视黄酯（RP）的电化学稳定性。还使用应用于上述介质的紫外可见分光光度法研究了棕榈酸视黄酯与纳米银之间的化学相互作用。紫外可见分光光度法的实验结果表明，在存在NO3-离子的情况下，RP-nAg相互作用较弱，而在存在氯离子的情况下，由于瞬时RP-nAg的存在，环境组成发生了显着变化。相互作用。循环伏安法显示在含有RP和RP / nAg的水/酒精溶液中在存在NO3-离子的情况下，铂电极上记录的循环伏安图的形状与在Clpresence中记录的环状伏安图不同，这是由于特定阴离子RP-nAg取决于阴离子类型。因此，与有利于化学RP-nAg相互作用的Cl-存在相比，NO3-的添加主要导致电化学相互作用。基于NO3-离子存在下的循环伏安法结果，提出了维生素A的电化学分解机理。

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《International Journal of Electrochemical Science》 |2018年第6期|共10页
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Bogdan Tutunaru; Adriana Samide; Cristian Neamt?u; Cristian Tigae;
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Spectroelectrochemical Studies of Interactions between Vitamin A and Nanocolloidal Silver

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