自制了一种简易的碱熔定氮装置。用正交设计法确定了实验条件:在300℃用氢氧化钠和氢氧化钾混合熔融铍试样;在250℃用氢氧化钾熔融铝试样,使其中的氮转化为氨而随氩气导入吸收液中。高含量用容量法测定,低含量用奈斯勒试剂光度法测定,检测限为1微克氮。 A simple alkaline melting nitrogen device was made. Orthogonal design was used to determine the experimental conditions: the beryllium sample was melted with sodium hydroxide and potassium hydroxide at 300 ℃; the aluminum sample was melted with potassium hydroxide at 250 ℃ to convert the nitrogen into ammonia, Into the absorption liquid. The high content is determined by the volumetric method. The low content is determined by Neisseh’s reagent spectrophotometry with a detection limit of 1 microgram nitrogen.