一般在植物分析方法中,测定总N量或有机N多釆用克耶尔达尔消化法和半微量蒸餾法,游离的氨以滴定法或奈斯勒比色法測定之。由于奈斯勒比色法已将蒸餾一步减略所以是快速而便利的,然而当习用的奈斯勒試剂在溶液中用作測定氮时,它們的不稳定性以及方法 Generally in plant analysis methods, the determination of the total amount of N or organic N more preclude the use of Keyerdal digestion and semi-micro distillation, free ammonia by titration or Naisi colorimetric determination. Neisseh colorimetry is fast and convenient as it has been one-step subtracted from neat colorimetric method, however, when conventional Nessler’s reagents are used to determine nitrogen in solution, their instability and method