ELI5: Explain Like I'm 5

Ion selective electrode

An ion selective electrode is like a tiny detective that can figure out what kind of molecules are in a liquid or solution. Imagine you have a mystery drink and you want to know if it has a lot of salt or sugar in it. The ion selective electrode can help you with that!

It looks like a little pen or stick with a special tip that can sense the presence of certain molecules. When you put the tip of the electrode in the drink, it can "smell" or detect the molecules and send a signal to a computer. The computer can then tell you how much of that molecule is in the drink.

It's really cool because each electrode is designed to only detect one specific molecule, like sodium ions or chloride ions. So, if you want to know how much of different things are in a drink or solution, you can use different ion selective electrodes to find out.

Scientists use these electrodes in all kinds of ways, from testing water pollution levels to monitoring medical treatments. It's like having a secret agent on your team – they can find out what's hiding in your drink or solution!