Gholivand Mohammad Bagher, Mohammadi Moslem, Khodadadian Mehdi, Rofouei Mohammad Kazem
Department of Chemistry, Razi University, Kermanshah, Iran.
Talanta. 2009 May 15;78(3):922-8. doi: 10.1016/j.talanta.2008.12.070. Epub 2009 Jan 22.
A plasticized poly (vinyl chloride) membrane electrode based on 1,3-bis(2-cyanobenzene)triazene (CBT) for highly selective determination of platinum(II) (in PtCl(4)(2-) form) is developed. The electrode showed a good Nernstian response (29.8+/-0.3 mV decade(-1)) over a wide concentration range (1.0 x 10(-6) to 1.0 x 10(-2)mol L(-1)). The limit of detection was 5.0 x 10(-7)mol L(-1). The electrode has a response time of about 40s, and it can be used for at least 1 month without observing any considerable deviation from Nernstian response. The proposed electrode revealed an excellent selectivity toward platinum(II) ion over a wide variety of alkali, alkaline earth, transition, and heavy metal ions, and it could be used in the pH range of 3.2-5.1. The practical utility of the electrode has been demonstrated by its use in determination of platinum ion in, alloy, tap, mineral and river water samples.
研制了一种基于1,3 - 双（2 - 氰基苯）三氮烯（CBT）的增塑聚氯乙烯膜电极，用于高选择性测定铂（II）（以PtCl₄²⁻形式）。该电极在较宽的浓度范围（1.0×10⁻⁶至1.0×10⁻²mol·L⁻¹）内呈现出良好的能斯特响应（29.8±0.3 mV/十倍浓度变化）。检测限为5.0×10⁻⁷mol·L⁻¹。电极响应时间约为40秒，并且至少可以使用1个月而未观察到与能斯特响应有任何明显偏差。所提出的电极对铂（II）离子相对于多种碱金属、碱土金属、过渡金属和重金属离子具有优异的选择性，并且可在pH值为3.2 - 5.1的范围内使用。通过将其用于测定合金、自来水、矿泉水和河水样品中的铂离子，证明了该电极的实际应用价值。
