期刊
OPTICS AND LASER TECHNOLOGY
卷 64, 期 -, 页码 213-219出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2014.05.021
关键词
Lasers; Fluorescence spectroscopy; Dissolved organic matter
资金
- Public Science and Technology Research Funds Projects of Ocean [201005030]
- National Science Foundation of China [41321004]
- National key Technology Research and Development Program of China [2012BAH32801]
A portable laser-induced fluorescence system (total weight about 1.7 kg) has been developed for detecting the level of dissolved organic matter in water. The portable system consists of a high pulse repetition frequency (10-kHz) microchip laser at 405 nm, a reflective fluorescent probe and a broadband micro spectrometer. The stability and sensitivity of the new instrument were studied. The detection limit of this new instrument was 0.75 ug/L, and its baseline drift was only 0.45% per hour. Field results showed that the portable system can work as well as commercial laboratory spectrophotometers. A significant correlation (R-2=0.96) was found between measurements taken by the new instrument and thoses measured by laboratory spectrophotometer. In addtion, influence of temperature variation on measurements by the new instrument was investigated. The portable system is promising for monitoring dissolved organic matter in water, especially in the field. (C) 2014 Elsevier Ltd. All rights reserved.
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