13 October 2006 A novel detecting system with full fluorescent spectra for pesticides
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Proceedings Volume 6280, Third International Symposium on Precision Mechanical Measurements; 62802Q (2006) https://doi.org/10.1117/12.716294
Event: Third International Symposium on Precision Mechanical Measurements, 2006, Urumqi, China
Abstract
A detecting system is developed applying the technologies of fiber-optic sensing, grating dispersion and multi-channel image sensing (Charge Coupled Device) based on the fluorescence mechanism of carbaryl. In this system, a pulsed xenon lamp is used as an excitation light source, optical fibers are selected to transmit and detect fluorescence, fluorescence dispersion is implemented with a small-sized flat field grating spectrometer and data gathering and A/D conversion are conducted with a high speed signal processing module. Moreover, the system is used to measure the fluorescence characteristics of carbaryl. The results show that a full fluorescence spectrum of carbaryl can be obtained in a single exposure under a UV excitation wavelength of 319nm, has a good linear relationship in the range of 4.0~100.0 ng/mL of carbaryl liquor and the minimum detecting limit is 4.0ng/mL with the linear correlation coefficient r being 0.9986. When this instrument is likewise applied for measuring carbaryl in river and ground water,the recovery may approach 100 %.
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Zhong dong Wang, Ya Juan Zheng, Gui cai Ruan, Yu tian Wang, "A novel detecting system with full fluorescent spectra for pesticides", Proc. SPIE 6280, Third International Symposium on Precision Mechanical Measurements, 62802Q (13 October 2006); doi: 10.1117/12.716294; https://doi.org/10.1117/12.716294
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