Raman Spectroscopic Discrimination of Estrogens.

Raman Spectroscopic Discrimination of Estrogens.
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DOI:
10.1016/j.vibspec.2018.02.011
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发表时间:
2018-05
影响因子:
2.5
通讯作者:
Desamero RZB
Desamero RZB
中科院分区:
化学3区
文献类型:
--
作者:
Vedad J;Mojica EE;Desamero RZB

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雌激素是一组在人体内发现的类固醇化合物,最终被排出并最终进入下水道污水。由于这些化合物可能会影响内分泌系统,其在下水道水中的检测和定量是重要的。在这项研究中,雌激素,如雌酮(E1),雌二醇(E2),雌三醇(E3),乙炔基雌二醇(EE 2)的鉴别和定量使用拉曼光谱。将模拟的拉曼光谱与实验数据相关联,以识别独特的标记峰,这被证明是有用的,在区分每个雌激素分子。在这些标记峰中,在光谱区域3200-3700 cm-1中由雌激素分子的羟基产生的拉曼模式。每个雌激素样品特有的其他拉曼模式也被识别出来,包括E1在1722 cm−1处的峰和EE 2在2109 cm−1处的峰,这对应于它们各自含有不同官能团的独特结构。为了定量雌激素混合物的组分,比较了每个鉴别拉曼带的强度,E1在581 cm−1,E2在546 cm−1,E3在762 cm−1,EE 2在597 cm−1,并针对783 cm−1处的共同峰的强度进行了归一化。定量分析得到的大多数结果在可接受的20%误差范围内。
Estrogens are a group of steroid compounds found in the human body that are eventually discharged and ultimately end up in sewer effluents. Since these compounds can potentially affect the endocrine system its detection and quantification in sewer water is important. In this study, estrogens such as estrone (E1), estradiol (E2), estriol (E3), and ethynylestradiol (EE2) were discriminated and quantitated using Raman spectroscopy. Simulated Raman spectra were correlated with experimental data to identify unique marker peaks, which proved to be useful in differentiating each estrogen molecules. Among these marker peaks are Raman modes arising from hydroxyl groups of the estrogen molecules in the spectral region 3200–3700 cm−1. Other Raman modes unique to each of the estrogen samples were also identified, including peaks at 1722 cm−1 for E1 and 2109 cm−1 for EE2, which corresponds to their distinctive structures each containing a different set of functional groups. To quantify the components of estrogen mixtures, the intensities of each identifying Raman bands, at 581 cm−1 for E1, 546 cm−1 for E2, 762 cm−1 for E3 and 597 cm−1 for EE2, were compared and normalized against the intensity of a common peak at 783 cm−1. Quantitative analysis yielded most results within an acceptable 20% error.
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