【摘要】 在分析比较前人实验方法的基础上,采用微波消解-紫外分光光度法测定水中总氮含量,对几种常见态氮溶液进行消解,如硝态氮、亚硝态氮和铵态氮,在确定消解时间后,作出校准曲线,并进行精密度检验。结果表明,该方法与国家标准方法相比具有操作简单、省时、消解完全、精密度较高等优点。更多还原

【Abstract】 After summarizing and comparing the methods and results of previous researches,this paper further studied the total nitrogen measurement by the introduction of Microwave Digestion-UV Spectrophotometer method.It was compared with Chinese standard method(GB11894-89) by measuring solutions of known concentrations.Unlike the researches shown in the literature,it digested several kinds of nitrogen,such as ammonia nitrogen,nitrite nitrogen and nitrate nitrogen.When the optimum digestion time was determined,the standard curve and precise experiment were made.The results showed that this method had the advantages of easy operation,time saving,high efficiency and satisfactory precision.更多还原