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Citation: LENG Fei, LI Ying, ZHEN Shunjun, LI Yuanfang. Determination of Amoxicillin Based on the Plasmon Resonance of Gold Nanoparticles[J]. Chinese Journal of Applied Chemistry, ;2012, 29(11): 1329-1334. doi: 10.3724/SP.J.1095.2012.00577 shu

Determination of Amoxicillin Based on the Plasmon Resonance of Gold Nanoparticles

1.
Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China

Corresponding author: LI Yuanfang,
Received Date: 30 December 2011
Available Online: 16 February 2012
Fund Project: 国家"重大新药创制"科技重大专项(2010ZX09401-306-1-4) (2010ZX09401-306-1-4)重庆创新药物孵化基地(2010zx09401-306-1-4)资助项目 (2010zx09401-306-1-4)

In pH=1.89 Briton-Robinson(BR) buffer,HAuCl4 can be reduced by amoxicillin to form gold nanoparticles,resulting in characteristic plasmon resonance absorption signals at 537 nm and 720 nm.The intensity at 537 nm is proportional to the amoxicillin concentration in a certain range,and amoxicillin can be detected based on the plasmon resonance absorption intensities of the gold nanoparticles.Under the optimized conditions(pH=1.89,reaction temperature is 65℃,reaction time is 40 min),amoxicillin can be detected in the range of 2.0×10^-6~3.6×10^-5 mol/L with the detection limit of 1.3×10^-7 mol/L.This method has been used in the synthesized samples determination of amoxicillin with the recovery of 90.4%~103.2% and a relative standard deviation of less than 4.6%,then it is applied to the determination of amoxicillin in two commercial capsules with satisfied results compared with HPLC method.
- amoxicillin,
- gold nanoparticles,
- plasmon resonance
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