Chinese Journal of Analytical Chemistry (分析化学) 2013/41:12 PP.1949-1950
Modified Mn-Al2O3 was prepared by impregnating neutral Al2O3 in Mn(NO3)2 solution for 4 h at a constant temperature of 40℃ under stirring condition and then roasting for 2 h at 800℃. The prepared modified Mn-Al2O3 was composited with activated carbon powder to form the pretreatment column for the filtration and purification of vegetable samples. A novel ion chromatographic method was developed for the simultaneous determination of nitrite and nitrate in vegetables by using this pretreatment column. Good linear relations for the determination NO2- and NO3- in the range of 0.2-10 mg/L were observed. The relative standard deviations were less than 0.35%. Recoveries of NO2- and NO3- were found to be ranged from 94% to 103%. Among the eleven kinds of vegetables which were sold on the market, the levels of nitrites in rape were the most, measuring 4.53 mg/kg. The garland chrysanthemum has the highest levels of nitrates, measuring 539 mg/kg.
1 JING Xiao-Fan, LI Xiao-Hui, ZHANG Qi-Sheng, WEN Jun, NI De-Jun, HUANG Cheng-Yu, LI Ming. Chinese J. Modern Preventive Medicine, 2013, 40(3): 423~424
景小凡, 李晓辉, 张其圣, 文 君, 倪德君, 黄承钰, 李 鸣. 现代预防医学, 2013, 40(3): 423~424
食品中亚硝酸盐和硝酸盐的测定. 中华人民和国国家标准. GB/T5009.33-2010
2 Determination of Nitrite and Nitrate in Foods. National Food Safety Standard of the People's Republic of China. GB/T5009.33-2010
农产品安全质量无公害蔬菜安全要求. 中华人民共和国国家标准. GB 18406.1-2001
3 Safety Qualification for Agricultural Product-Safety Requirements for Non-environmental Pollution Vegetable. National Food Safety Standard of the People's Republic of China. GB 18406.1-2001