Study on determination of nitrate nitrogen in water by p-hydroxybenzoic acid spectrophotometry
Xiao Xiangqun, Guo Zheng, Mao Yujie, Wu Liping, Mao Yuxia, Wang Wei
INDUSTRIAL WATER TREATMENT . 2014, (11): 80 -83 .  DOI: 10.11894/1005-829x.2014.34(11).080