泥炭中全氮的测定

Determination of Total Nitrogen in Peat

采用连续流动化学分析仪(Continuous Flow Analyzer,CFA),对泥炭中的全氮进行分析。方法有良好的线性关系(r=0.9999),回收率为99%—105%,测试速度是比色法测试速度的15—20倍,操作简便、准确度好,对氮化学研究有一定意义。

The method to analyze the content of total nitrogen in the peat by the instrument of continuous flow analyzer was reported, and the method has remarkable reliability and repeatability. The standard curve with standard solution was established,the result show that the linear coefficient of the curve is 0. 9999 and reliable data is obtained by selecting precise test parameters and convenient sample digestion. Another merit is the velocity 15--20 times than normal method. Experiment of recovery is safe and the coefficient is in keeping with GB, the content of total nitrogen was computed with formula N（mg/kg）= （measured value--blank value）/10000.