Wang Liang, Zhang Yi, Park Yeonju, Chen Lei, Jung Young Mee
Key Laboratory of Preparation and Applications of Environmental Friendly Materials, Jilin Normal University, Ministry of Education.
Anal Sci. 2017;33(1):23-27. doi: 10.2116/analsci.33.23.
In this paper, we demonstrate a new promising resonance Raman (RR)-based method for the determination of Fe concentrations in aqueous solutions. Iron ions were quantified at a low concentration range by employing hydroxylamine hydrochloride as the reductant, and phenanthroline as the complexing agent, thereby reducing Fe to Fe. The addition of Fe to the detection reagent resulted in a rapid color change from colorless to orange-red, together with an obvious new RR band appearing at 1459 cm. Herein, the RR intensity of the phenanthroline-Fe complex strengthened with increasing Fe concentration, which was identified from the variation of the Raman spectra. Therefore, we successfully detected Fe at lower concentrations using the proposed method, illustrating its great potential for the detection of Fe with abundant RR fingerprint information. More importantly, the proposed method exhibited a wide liner range from 0.05 to 10 μg/mL.
在本文中，我们展示了一种基于共振拉曼（RR）的新方法，用于测定水溶液中的铁浓度。通过使用盐酸羟胺作为还原剂，邻菲罗啉作为络合剂，在低浓度范围内对铁离子进行定量，从而将Fe还原为Fe。向检测试剂中添加Fe会导致颜色迅速从无色变为橙红色，同时在1459 cm处出现一个明显的新RR带。在此，邻菲罗啉 - Fe络合物的RR强度随Fe浓度的增加而增强，这从拉曼光谱的变化中得以确定。因此，我们使用所提出的方法成功检测到了较低浓度的Fe，说明了其利用丰富的RR指纹信息检测Fe的巨大潜力。更重要的是，所提出的方法显示出从0.05至10 μg/mL的宽线性范围。
