论文部分内容阅读
水中剩余臭氧量的测定,为处理饮用水时的臭氧投加量提供依据,对节约电能消耗有较大的经济意义. 本文借旋转铂圆盘电极用伏安法(三电极体系)测定了水中剩余臭氧量.对测定条件进行了较为深入的研究.得出在pH6.64的Na~2HPO_4-KH_2PO_4缓冲液中,铂工作电极电位为+0.3V(VS.S.C.E),电极转速为2000转/分,臭氧浓度为0～1ppm时,极限扩散电流与其浓度呈良好的线性关系.水中的Cu~(2+)离子对测定有干扰,加入适量的六偏磷酸钠可消除.用本法对实际水样进行了测定,结果令人满意.
Determination of the amount of residual ozone in water for the treatment of drinking water ozone dosage provides a basis for saving energy consumption has greater economic significance.In this paper by rotating platinum disc electrode voltammetry (three electrode system) determination of water The residual ozone amount.After a more in-depth study on the determination conditions, the working electrode potential of platinum was + 0.3V (VS.SCE) in pH6.64 Na ~ 2HPO4-KH2PO4 buffer solution, the electrode speed was 2000 r / Min, the limit diffusion current and its concentration showed a good linear relationship when the concentration of ozone was 0 ~ 1ppm.Cu 2+ ions in water had interference on the determination, adding the appropriate amount of sodium hexametaphosphate can be eliminated.Using this method to the actual Water samples were measured, the results are satisfactory.