| 光谱学与光谱分析 |
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| Instrumentation and Application of a Portable Pretreating System for a Speedy Plasmon-Enhanced Raman Spectroscopy Detection Towards Food Safety |
| NI Wei-quan1, HE Jian1*, LIU Guo-kun2, CHEN Hong-ju2, ZENG Yong-ming2, TIAN Zhong-qun2 |
1. Department of Mechanical and Electrical Engineering, Xiamen University, Xiamen 361005, China
2. College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China |
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Abstract The present paper developed a portable and fast sample pretreatment apparatus. It has many virtues like being portable, low power consumption and convenient operation, short extraction time and sound repeatability. Therefore，it can meet the requirements of on-site rapid detection pretreatment. The apparatus consists of four functional modules: ultrasonic extraction unit, heating unit, exhaust gas evaporation and absorption unit and control system. In addition, LED control panel and alarm device were designed. The whole treatment process needs three steps: ultrasonic extraction, liquid-liquid extraction and solvent evaporation by heating and pumping. For test of this apparatus performance, three real samples (pepper powder, pepper oil, bean sauce) containing banned additive Rhodamine B were taken as experiment objects. Compared with conventional laboratory pretreatment method, the PERS spectra achieved by two methods were little changed, but the experiment time was halved. In addition, the test results showed relative standard deviation less than ±5%.
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Received: 2014-06-05
Accepted: 2014-09-16
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Corresponding Authors:
HE Jian
E-mail: jianhe98@xmu.edu.cn
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