Au@PVP Core-Shell Nanoparticles Used as Surface-Enhanced Raman Spectroscopic Substrate to Detect Malachite Green
10.11895/j.issn.0253-3820.160126
- VernacularTitle:Au@PVP核壳纳米粒子作为表面增强拉曼散射基底检测孔雀石绿
- Author:
Ningning XU
;
Qin ZHANG
;
Wei GUO
;
Qintao LI
;
Jie XU
- Publication Type:Journal Article
- Keywords:
Aupolyvinyl-pyrrolidone core-shell nanoparticles;
Malachite Green;
Surface-enhanced Raman spectroscopy;
Rapid detection;
Quantitative analysis;
Tilapia fish fillets
- From:
Chinese Journal of Analytical Chemistry
2016;44(9):1378-1384
- CountryChina
- Language:Chinese
-
Abstract:
The core-shell nanopaticles of Au@polyvinyl-pyrrolidone ( PVP) with uniform size and controllabe shell-thickness were prepared by hydrothermal method. The core-shell nanoparticles could be assembled to be the monolayer array on Si substrate relying on the dispersion of core-shell nanoparticles arising from PVP shell. The malachite green ( MG ) absorbed by H-bond could be detected on the array under the electromagnetic enhancement of inner-core Au nanoparticles. Under the conditions of the optimum shell-thickness of Au@PVP and the appropriate absorbed time of MG, the detection of MG could be realized in the linear range from 1 × 10-10 mol/L to 1 × 10-5 mol/L with the correlation coefficient ( R2 ) of 0. 98. The detection limit was 10-12 mol/L. This method was applied to the determination of MG in tilapia fish fillets of Xiagang market. No MG was found in this real sample. The spiked recoveries of the sample ranged from 70. 8% to 126. 0%. This method is simple and accurate, and can be used for detection of MG in the fish.
