[scientizscht (OP)]

What are the available methods to detect or measure ions in a solution?

In addition, is there any remote?

Thanks

[Bored chemist]

There are so many that the question is almost meaningless.
Almost all of the techniques in chemistry will measure, or can be adapted to measure ions.

[evan_au]

If you are interested in H+ ions, a Ph indicator solution will work well.

If you are interested in more complex ions, a mass spectrometer will work well. But this is overthinking it if you want to measure pH.

[scientizscht (OP)]

I am interested in more complex ions. Will scanning the solution with electromagnetic waves work? Will they detect the ions? What are such applications?

[chiralSPO]

I am interested in more complex ions. Will scanning the solution with electromagnetic waves work? Will they detect the ions? What are such applications?

That depends. There are certainly many spectroscopic techniques using EM radiation to measure, identify, or quantify chemical species including ions. From high energy X-rays to radio waves, basically every part of the EM spectrum can interact with matter, and in ways that are both measurable and unique to each chemical species. The trick is that you have to know what you're looking for, and use that info to determine how to look.

[Bored chemist]

I am interested in more complex ions. Will scanning the solution with electromagnetic waves work? Will they detect the ions? What are such applications?

One application is being able to tell vodka from methylated spirits (without even opening the bottle).
The purple dye in meths is an ion and you can "scan" it by using different receptors in your eye.

You keep asking questions where it might be easier to answer the opposite question like "Are there any analytical techniques that don't work with ions, but only with neutral species?"

[scientizscht (OP)]

If a reaction in a solution produces acid, how can you detect it remotely?

[evan_au]

If a reaction in a solution produces acid, how can you detect it remotely?

Use an internet-connected pH meter.

A characteristic of acids is that they produce H+ ions.

A characteristic of pH meters is that they measure H+ ions.

A characteristic of the internet is that it passes information from one place to another...

[chiralSPO]

If a reaction in a solution produces acid, how can you detect it remotely?

If there is a suitable pH indicator dye, a very small increase in the concentration of available protons (acid) can be detected by eye, or quantified by spectrometer.

[Bored chemist]

If a reaction in a solution produces acid, how can you detect it remotely?

Add  a pH indicator and point a webcam at it.

What problem are you trying to solve?

[Bored chemist]

If a reaction in a solution produces acid, how can you detect it remotely?

If there is a suitable pH indicator dye, a very small increase in the concentration of available protons (acid) can be detected by eye, or quantified by spectrometer.

For the record, with care you can quantify  pH by eye to  +/- 0.1 without anything expensive or complex.

[Bored chemist]

If a reaction in a solution produces acid, how can you detect it remotely?

The issue here is not  one of technical ability on the part of analytical chemists or instrument manufacturers. The problem is your failure to specify the problem.

[scientizscht (OP)]

Thanks but I said remotely, the solution is in a bottle that need to be sealed!

[Bored chemist]

Do you realise that telling us that the stuff is in a sealed bottle actually makes the question easier to answer?
That single constraint rules out many possibilities and, if you had said it at the outset, you would have had an answer in the first couple of posts.

NMR  or Raman spectroscopy.

[scientizscht (OP)]

Do you realise that telling us that the stuff is in a sealed bottle actually makes the question easier to answer?
That single constraint rules out many possibilities and, if you had said it at the outset, you would have had an answer in the first couple of posts.

NMR  or Raman spectroscopy.

Omg I told you it's an acid.

[Bored chemist]

Do you realise that telling us that the stuff is in a sealed bottle actually makes the question easier to answer?
That single constraint rules out many possibilities and, if you had said it at the outset, you would have had an answer in the first couple of posts.

NMR  or Raman spectroscopy.

Omg I told you it's an acid.

So what?
Do you somehow think people can't open bottles of acid?
Do you not realise that NMR or Raman can be used to measure H+ ion concentration in acids?

What do you mean?

[The Spoon]

Do you realise that telling us that the stuff is in a sealed bottle actually makes the question easier to answer?
That single constraint rules out many possibilities and, if you had said it at the outset, you would have had an answer in the first couple of posts.

NMR  or Raman spectroscopy.

Omg I told you it's an acid.

And with that  sentence you have disqualified yourself from any serious consideration by anybody with any kind of scientific background.

[Bored chemist]

Has anyone worked out what the OP is on about yet?

[scientizscht (OP)]

Has anyone worked out what the OP is on about yet?

They apparently measure ocean's acidity from space so I wanted to know how they do that.

[alancalverd]

Simplest method is to look at the color of seaweed.