[Study on the method for the determination of nitric nitrogen, ammoniacal nitrogen and total nitrogen in plant].
This paper reports the determination of three nitrogen states in plants: nitric nitrogen, ammoniacal nitrogen and total nitrogen. The plant sample was digested by the Kjeldathl method with H2SO4 + H2O2. The solution of the sample was determined by three methods: absorption photometric method, indigotic colorimetry, and UV absorption photometric method after K2S2O8 oxidation. By comparing the results, the relationship among the three N states is that the total N = NH4+ + NO3-. Suitable methods were found for the determination of the elements, thus providing a scientific basis for the selection of suitable methods for chemical element analysis in plants.
Lü
Wei-xian
WX
College of Life Science, Zhejiang University, Hangzhou 310029, China.
Ge
Ying
Y
Wu
Jian-zhi
JZ
Chang
Jie
J
D000641:Ammonia / Q000032:analysis / Q000737:chemistry*; D004784:Environmental Monitoring / Q000379:methods; D006861:Hydrogen Peroxide / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D009573:Nitrites / Q000032:analysis / Q000737:chemistry*; D009584:Nitrogen / Q000032:analysis*; D009586:Nitrogen Fixation; D010084:Oxidation-Reduction; D010944:Plants / Q000737:chemistry*; D012015:Reference Standards
D009573:Nitrites; D000641:Ammonia; D006861:Hydrogen Peroxide; D009584:Nitrogen