铊(1)离子电化学传感器的研究——2.以30—冠—10铊(1)离子电极测定铊(1)  

Study on fhe Thallous(I) Electrochemical Sensor II. Thallous Ion-Selective Electrodes Based on 4 Derivatives of Dibenzo- 30-crown-10 and the Determination of Thallous Ion (I)

作　　者：钱国英[1] 吴国梁[1] 张复昇 

机构地区：[1]中国科学院青海盐湖研究所,西宁810008 [2]中国科学院兰州化学物理研究所,730000

出　　处：《化学传感器》1996年第4期255-261,共7页Chemical Sensors

摘　　要：以合成的四种30—冠—10衍生物为中性载体制备了PVC膜铊(1)离子电极,探讨了冠醚结构、增塑剂、添加物与电极性能的关系。以10^(-2)mol/L醋酸镁为离子强度调节剂,邻苯二甲酸二丁酯增塑的添加有四(对氯苯)硼钾的四叔丁基二苯并—30—冠—10铊(1)电极的线性响应范围为1×10~5～5×10~2mo1/L(TINO_3),K_(Tl.k)^(pot)为0.18。同时应用该电极和缬氨霉素钾电极作为双指示电极,伴以选择系数校正,可以标准加入法测定铊(1)、钾共存溶液中≥5×10^(-5)mol/L(～10ppm)的Tl^-。PVC membrane T1+-selective electrodes based on 4 derivatives of dibenzo-30-crown-10 were prepared The relationship between the structures of these carriers and the performance of the electrodes ,is well as the effects of the plasticizers and related additives were investigated. The results indicated that K(?) of the electrode based on 4. 6,4', 6'-tetra-tert-butyl-dibenzo-30-crown-10 and KTpClPB with DBP as plasticing solvent is 0. 18. The elec-(?)a linesr response within the concentration range of 1 ×10-5- 5× 10-2mol/L TlNO3 with 10-2 mol/L Mg(Ac)2 as ISAB. T1+ (5× 10-5 mol/L-10 ppm) in a solution containing K+ can be determined by the known additior of double standards with dual indicator electrode of Tl-ISE and the K -ISE. and making correction by selectivity coefficients of K(?)and K(?).

关 键 词：铊 离子选择电极 电化学 测定 化学传感器 

分 类 号：O614.373[理学—无机化学] O657.15[理学—化学]