【摘要】 本文研究了对氨基偶氮苯盐酸盐水溶液(PABS)的色度与吸收光谱的关系,着重探讨了利用吸收光谱确定溶液的色度。通过计算,所得结果与标准监测方法的结果非常吻合。在PABS水溶液中存在以下平衡:C5-丢—N/---~NHz‘形式c,——~)--N—/4叫e卜盂H3‘形式A,+— ’C5-~;-‘7--Cf---NH2 C5-石—王叫:卜吉H:‘**”随着溶液酸性的增加,平衡向左移动,在强酸性条件下形式c占主导地位,在弱酸性条件下,形式A和形式I居多。PABS在溶液中的主要存在形式决定了溶液的色度,并且色度随溶液的pH变化而变化。更多还原

【Abstract】 In this paper, hue of the aqueous solution of p-aminoazobenzene chloride salt (PABS) is determined from the absorption spectrum so as to find a better method to de-colorize this kind of wastewater. The calculation results accord with what is obtained by means of the standard method for color monitoring very well. So, the colorization phe-nomena can be inferred from the absorption spectrum. In PABS solution there exits an equilibrium: form C form A form I . The equilibrium shifts to left with the in-crease of acidity. Form C predominates in strong acidity condition, while from A and form I is dominant in weaker condition in turn. Hue of the solution is determined by the dominating form and changes with the acidity.更多还原