I received an ICP-OES test in the mail, but zero instructions on what to do with these multiple tubes. Do I just fill them all with tank water and mail it back?
There’s three tubes and a syringe. Should I wait to take the samples on Monday and mail it then so it doesn’t sit somewhere over the weekend?
There’s three tubes and a syringe. Should I wait to take the samples on Monday and mail it then so it doesn’t sit somewhere over the weekend?

