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1. A portable system for rapid detection of heavy metal ions in soil | |||
Wang Hui,Zhao Guo,Wang Zhiqiang,Liu Gang | |||
Agronomy 20 May 2016 | |||
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Abstract:In this paper, a portable system based on electrochemical theory, ultrasonic extraction and microelectronic technology for rapid detection of heavy metal ions in soil was designed and manufactured. This system mainly combined with three parts. The heavy metal ions in soil were extracted by the ultrasonic-assistant extraction. The detection instrument is made up of the PC software and hardware circuit, which the major function was sending commands and parameters to the hardware, receiving the data, and analysis and quantitative calculation. Traditional three-electrode system, a Bi/GCE as working electrode, a Ag/AgCl electrode as reference electrode and a platinum column as auxiliary electrode, was used, which exhibited a quite good detecting effectiveness by means of electrochemical square wave anodic stripping voltammetry(SWASV). The experimental parameters were optimized. Using this system, the linear range was from 0.5 to 30 μg/L for Cd(II)and 0.5 to 40 μg/L for Pb(II). Finally, The developed system was further applied to the determination of Cd(II) and Pb(II) in real soil analysis with satisfactory results. | |||
TO cite this article:Wang Hui,Zhao Guo,Wang Zhiqiang, et al. A portable system for rapid detection of heavy metal ions in soil[OL].[20 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4691699 |
2. Hyperspectral laser-induced fluorescence imaging for nondestructive assessing soluble solids content of orange | |||
Liu Muhua,Shufen Hu,Huaiwei Lin,Enyou Guo | |||
Agronomy 12 February 2007 | |||
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Abstract:Fluorescence imaging is a promising technique for assessing postharvest quality of fruit. This paper reports on using a hyperspectral laser-induced fluorescence imaging technique for measurement soluble solids content (SSC) of orange fruit. A continuous wave laser (632 nm) was used as an excitation source for inducing fluorescence in oranges. Fluorescence scattering images were acquired from ‘Nanfeng’ oranges by a hyperspectral imaging system at the instance of laser illumination (0 min) in range of 700-1000nm. The hyperspectral fluorescence image data were represented by mean spectra of sub-image. The fruit soluble solids content were measured using hand-held refractometer. A line regressing method was used for developing prediction models to predict fruit soluble solids content. Excellent predictions were obtained for soluble solids content with the correlation coefficient of prediction of R=0.999(training sample)and R=0.998 (validation sample). The results show that hyperspectral laser-induced fluorescence imaging is a very good method for nondestructive assessing soluble solids content of orange. | |||
TO cite this article:Liu Muhua,Shufen Hu,Huaiwei Lin, et al. Hyperspectral laser-induced fluorescence imaging for nondestructive assessing soluble solids content of orange[OL].[12 February 2007] http://en.paper.edu.cn/en_releasepaper/content/11134 |
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