摘要
我们曾报道以3’-正十五烷基-苯并-30-冠-10为传感活性物质制成的PVC膜钾离子选择电极,这种电极对Na^+的选择系数达9.2×10^(-4)。吴国梁等系统地测试十九个双冠醚PVC膜钾电极,发现其中有些电极对Na^+有很好的选择性。为了进一步寻找性能更好的钾电极,我们合成了十个双酰胺型双(3’-正十五烷基-苯并-15-冠-5)化合物。试验结果表明,以这类双冠醚所制得的钾电极性能优良。
Ten potassium ion selective PVC membrane electrodes based on five new bis-crown
ethers were prepared and their electrode behaviors were evaluated. Seven of these
electrodes exhibited a linear response to the potassium ions within the concentration
range 10^(-1)--10^(-6) M KCl. The low limits of linear response were 10^(-6)--10^(-6) M. The
slopes of their calibration plots ranged from 51.6 to 60.5 mV per activlty decade.
These electrodes exhibited remarkable potassium ion selectivity with respect to all other
alkali and alkaline earth metal cations.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1989年第5期495-498,共4页
Acta Chimica Sinica
