P-矩阵分光光度法同时测定水中 NO_3^- 和 NO_2^- 含量的研究

Study on the Simultaneous Determination of NO - 3 and NO - 2 in Water by P Matrix Spectrophotometric Method

论述了Ｐ－矩阵分光光度法同时测定水中ＮＯ－３和ＮＯ－２的含量，配制９份不同配比的ＮＯ－３和ＮＯ－２混合标准溶液，在１９７～２１５ｎｍ波长范围内，选取７个波长点测定光度值，求得系数矩阵Ｐ．经对合成水样和实际水样测定，九次测定的变异系数均小于１．０％．

The P Matrix spectrophotometric method has been developed for the simultaneous determination of NO - 3 and NO - 2 in water. This method is simple without separation. The results are satisfactory and the relative standard deviatons of 9 analysis are less than 1.0%.