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-1A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
010.93910.1519.82921.08319.25519.620
511.09110.20810.23321.23519.61820.124
1011.24210.82010.53622.44620.19221.689
2011.59511.49011.14124.66720.91923.657
3011.89812.25512.50426.63521.58824.969
4013.05913.42112.98528.55322.75525.676
5013.81614.58813.81629.36023.73025.979
10018.45918.20317.45031.27827.93829.209
15023.30422.92721.84035.02131.18931.429
20027.44227.28726.58438.99934.26836.678