Construction and Test of Long Pathlength Automated Analyzer of Trace Nutrients in Seawater
SUN Zhao-hua1,2, CAO Wen-xi1, ZHAO Jun1,2, LI Cai1, ZHOU Wen1,2
1. LED Laboratory, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China 2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
Abstract：Nutrients are routine aspects for marine environment monitoring. With low concentration in oceans, nutrients are difficult to be measured with a routine spectrophotometer. Based on liquid core waveguides, a new high-sensitivity analyzer was constructed to measure trace nutrients in oceans. The analyzer can provide continuous measurement of spectral absorbance of water sample in the spectral range from 350 to 900 nm with a spectral resolution of 1.02 nm. The processes such as sample injection, data acquisition of absorbance and data analysis are automatically controlled by a built-in PC104 micro computer. The results of test proved that, with the reaction time of about three minutes, the analyzer could provide a detection limit of the order of nmol·L-1, which is about 1 000 times lower than that of routine spectrophotometer. The analyzer is amenable to trace nutrients monitoring in oceans.
孙兆华1,2,曹文熙1,赵俊1,2,李彩1,周雯1,2 . 基于长光程技术的痕量海水营养盐自动分析仪的设计与测试[J]. 光谱学与光谱分析, 2008, 28(12): 3000-3003.
SUN Zhao-hua1,2, CAO Wen-xi1, ZHAO Jun1,2, LI Cai1, ZHOU Wen1,2. Construction and Test of Long Pathlength Automated Analyzer of Trace Nutrients in Seawater. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2008, 28(12): 3000-3003.
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