کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1169518 | 960638 | 2008 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Ultrasensitive determination of silver ion based on synchronous fluorescence spectroscopy with nanoparticles Ultrasensitive determination of silver ion based on synchronous fluorescence spectroscopy with nanoparticles](/preview/png/1169518.png)
Based on the characteristics of synchronous fluorescence spectroscopy (SFS), a new method with high sensitivity and selectivity was developed for rapid determination of silver ion with functional cadmium sulphide (CdS) nanoparticles as a fluorescence probe. When Δλ (λem − λex) = 215 nm, maximum synchronous fluorescence is produced at 304 nm. Under optimal conditions, functional cadmium sulphide displayed a calibration response for silver ion over a wide concentration range from 0.8 × 10−10 to 1.5 × 10−8 mol L−1. The limit of detection was 0.4 × 10−10 mol L−1 and the relative standard deviation of seven replicate measurements for the lowest concentration (0.8 × 10−10 mol L−1) was 2.8%. Compared with several fluorescence methods, the proposed method had a wider linear range and improved the sensitivity. Furthermore, the concentration dependence of the synchronous fluorescence intensity is effectively described by a Langmuir-type binding isotherm.
Journal: Analytica Chimica Acta - Volume 616, Issue 2, 2 June 2008, Pages 170–176