论文部分内容阅读
离子选择电极是一种根据物理化学原理直接测量分析组分的新工具,也可以这样来定义:离子选择电极是一种以电位法来测量溶液中某一特殊离子活度的指示电极。最早的pH玻璃电极就是离子选择电极的一种。我们知道溶液是具有生命活力的有机体的组成部分,而且又非常辽阔地布满于地球表面,所以这一工具的出世,对溶液化学的影响甚大,有人把它与光学上的激光相比。离子选择电极对其他技术较难以测量的离子,例如Na~+、K~+、Ca~(2+)、F~-、SO_4~(2-)、S~(2-)、NO_3~-、ClO_4~-等,具有特别效验,它的灵敏度常常低于1ppb,选择比普通在10~5以上,此外还有其他一些相
An ion-selective electrode is a new tool that directly measures the analyte composition based on physico-chemical principles. It can also be defined as follows: An ion-selective electrode is an indicator electrode that uses potentiometry to measure the activity of a particular ion in a solution. The earliest pH glass electrode is a kind of ion selective electrode. We know that solution is an integral part of a viable organism and is vastly over the Earth’s surface, so the advent of this tool has had a great effect on solution chemistry, compared to optical lasers. Ion selective electrodes are more difficult to measure for other technologies such as Na ~ +, K ~ +, Ca ~ (2 +), F ~ -, SO_4 ~ (2 -), S_2, NO_3 ~ ClO_4 ~ -, etc., with special effects, its sensitivity is often less than 1ppb, the choice of more than 10 to 5 in general, in addition to other phases