| 多元曲线分辨法测定4-(2-吡啶偶氮)-间苯二酚的电离常数 |
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| 引用本文： | 朱衷榜,倪永年.多元曲线分辨法测定4-(2-吡啶偶氮)-间苯二酚的电离常数[J].南昌大学学报(理科版),2006,30(6):549-551,555. |
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| 作者姓名： | 朱衷榜 倪永年 |
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| 作者单位： | 南昌大学,化学系,江西,南昌,330031 |
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| 基金项目： | 国家自然科学基金;江西省自然科学基金;生物传感及化学计量学重点实验室基金 |
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| 摘 要： | 分别用渐进因子分析（evolving factor analysis，EFA）和SIMPLISMA（Simple—to—use interactive self—modeling mixture analysis）并结合交替最小二乘法（alter least—squares，ALS）计算4-（2-吡啶偶氮）-间苯二酚（PAR）的光谱滴定数据，分辨出PAR在pH0—14水溶液中各形态的分布曲线，测得PAR各级电离常数分别为pKa1=2．96、pKa2=5．45、pKa3=12．01。该法用于电离常数的测定，能避免各形态共存时的相互干扰，测定结果令人满意。
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| 关 键 词： | 4-(2-吡啶偶氮)-间苯二酚 电离常数 渐进因子分析 交替最小二乘法 |
| 文章编号： | 1006-0464（2006）06-0549-03 |
| 收稿时间： | 2006-04-20 |
| 修稿时间： | 2006-04-20 |
Determination of Ionization Constants of 4-(2-pyridilazo)-resorcinol Using Multi-curve Resolution Method |
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| ZHU Zhong-bang,NI Yong-nian.Determination of Ionization Constants of 4-(2-pyridilazo)-resorcinol Using Multi-curve Resolution Method[J].Journal of Nanchang University(Natural Science),2006,30(6):549-551,555. |
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| Authors: | ZHU Zhong-bang NI Yong-nian |
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| Institution: | Department of Chemistry, Nanchang University, Nanchang 330031, China |
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| Abstract: | Evolving factor analysis(EFA) and Simple-to-use interactive self-modeling mixture analysis(SIMPLISMA) combined with alter least-squares(ALS) respectively were used to calculate the spectroscopic titration datum of 4-(2-pyridilazo)-resorcinol(PAR),the distribution curve of all forms of PAR in water were resolved at pH 0 to 14,the determined constants of PAR were pK_(a1)=2.96,pK_(a2)=5.45 and pK_(a3)=12.01.These methods can be used to eliminate the interference of coexisted compounds in determination of ionization constant,the results are satisfactory. |
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| Keywords: | SIMPLISMA |
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