文献类型：期刊文献

英文题名：Determination of Tricyclazole Content in Paddy Rice by Surface Enhanced Raman Spectroscopy

作者：Tang, Huirong[1,2];Fang, Dongmei[1,2];Li, Qingqing[1,2];Cao, Peng[3];Geng, Jinpei[3];Sui, Tao[3];Wang, Xuan[1,2];Iqbal, Jibran[1,2];Du, Yiping[1,2]

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Res Ctr Anal & Test, Shanghai 200237, Peoples R China;[3]Yantai Entry Exit Inspect & Quarantine Bur, Yantai 264000, Peoples R China

年份：2012

卷号：77

期号：5

起止页码：T105

外文期刊名：JOURNAL OF FOOD SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000304811000029)】；

基金：This work was supported by the Natl. Natural Science Foundation of China (20975039) and General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China (2011IK226).

语种：英文

外文关键词：content; determination; paddy rice; surface enhanced Raman spectroscopy (SERS); tricyclazole

摘要：An ultrasensitive method based on Surface enhanced Raman scattering (SERS) has been developed to determine content of a pesticide which is tricyclazole in paddy rice using sliver colloid as a substrate and pyridine as an internal standard. The peaks at 424 and 1035 cm(-1) in a SERS spectrum were selected as analytic and internal peaks, respectively, and their intensity ratio I-t/I-p was used to calculate the regression concentration of tricyclazole. The correlation between I-t/I-p and concentration showed significant linear relationship with a correlation coefficient of R-2 = 0.995 in a concentration range of 0.05 to 0.70 mg/L and the tricyclazole solution can be detected to be low as 0.002 mg/L by SERS. The method was applied to determine tricyclazole contents of 3 real rice samples with a standard addition method in order to eliminate interference of matrix. The errors of SERS measurements for the 3 samples were 0.0008 to 0.0246, 0.0013 to 0.0028, and 0.0129 to 0.0304 mg/kg, respectively, compared with the results obtained by high performance liquid chromatography method. This also showed a good reproducibility with low values of relative standard deviation (n = 3) for the 3 samples ranged from 3.63% to 4.64%.