紫外分光光度法测定NO3--N过程中S2O32-的干扰与消除
|
付昆明,黄少伟,杨帆
|
Interference and elimination of thiosulfate ion in the measurement of nitrate nitrogen by ultraviolet spectrophotometry
|
Kunming FU,Shaowei HUANG,Fan YANG
|
|
表1 不同S2O32-投加量对NO3--N测定的影响
|
Table 1 Effect of different dosages of thiosulfate on NO3--N measurement
|
|
S2O32-/(mg·L-1) | A组 | | B组 |
---|
实测NO3--N/(mg·L-1) | 实测NO3--N/(mg·L-1) |
---|
第1次 | 第2次 | 第3次 | 第1次 | 第2次 | 第3次 |
---|
0 | 10.939 | 10.151 | 9.829 | | 21.083 | 19.255 | 19.620 | 5 | 11.091 | 10.208 | 10.233 | | 21.235 | 19.618 | 20.124 | 10 | 11.242 | 10.820 | 10.536 | | 22.446 | 20.192 | 21.689 | 20 | 11.595 | 11.490 | 11.141 | | 24.667 | 20.919 | 23.657 | 30 | 11.898 | 12.255 | 12.504 | | 26.635 | 21.588 | 24.969 | 40 | 13.059 | 13.421 | 12.985 | | 28.553 | 22.755 | 25.676 | 50 | 13.816 | 14.588 | 13.816 | | 29.360 | 23.730 | 25.979 | 100 | 18.459 | 18.203 | 17.450 | | 31.278 | 27.938 | 29.209 | 150 | 23.304 | 22.927 | 21.840 | | 35.021 | 31.189 | 31.429 | 200 | 27.442 | 27.287 | 26.584 | | 38.999 | 34.268 | 36.678 |
|
|
|