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SPECTROSCOPY AND SPECTRAL ANALYSIS  2019, Vol. 39 Issue (01): 161-165    DOI: 10.3964/j.issn.1000-0593(2019)01-0161-05
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Rapid Determination of Nitrate Nitrogen and Nitrite Nitrogen by Second Derivative Spectrophotometry
WANG Jing-min1, ZHANG Jing-chao1*, ZHANG Zun-ju1,2
1. Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China
2. Hebei University of Environmental Engineering, Qinhuangdao 066004, China