期刊
LUMINESCENCE
卷 32, 期 7, 页码 1227-1232出版社
WILEY
DOI: 10.1002/bio.3315
关键词
commercial propolis extracts; molecular fluorescence spectroscopy; porphyrin; zinc determination
资金
- Universidad Nacional del Sur (Dpto. de Quimica-INQUISUR)
- Proyecto Grupo de Investigacion [PGI 24/Q077]
- Secretaria General de Ciencia y Tecnologia (Argentina)
- CONICET
- CIC (Comision de Investigaciones Cientificas de la Provincia de Buenos Aires)
- CAPES
- CNPq
- FINEP
The quantification of zinc in over-the-counter drugs as commercial propolis extracts by molecular fluorescence technique using meso-tetrakis(4-carboxyphenyl)porphyrin (H2TCPP4) was developed for the first time. The calibration curve is linear from 6.60 to 100nmol L-1 of Zn2+. The detection and quantification limits were 6.22nmol L-1 and 19.0nmol L-1, respectively. The reproducibility and repeatability calculated as the percentage variation of slopes of seven calibration curves were 6.75% and 4.61%, respectively. Commercial propolis extract samples from four Brazilian states were analyzed and the results (0.329-0.797mg/100mL) obtained with this method are in good agreement with that obtained with the Atomic Absorption Spectroscopy (AAS) technique. The method is simple, fast, of low cost and allows the analysis of the samples without pretreatment. Moreover the major advantage is that Zn-porphyrin complex presents fluorescent characteristic promoting the selectivity and sensitivity of the method.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据