Comparison of Several Extraction Methods for the Spectrophotometric Determination of Nitrate and Nitrite in Vegetables
CHEN Qiu-sheng,LIANG Shu-xuan,LI Ke,SUN Han-wen
Journal of Hebei University (Natural Science Edition) . 2007, (2): 174 -178 .  DOI: 10.3969/j.issn.1000-1565.2007.02.018