Swirling dropwise test regeants.

[sqlb3rn]

For dropwise tests, is it necessary to swirl the mixture after every single drop, or can I add multiple drops and then swirl? For example, if I know the CH is well over 100, can I add 10 drops and then start to swirl after each drop, or should I start swirling the mixture after every drop from the first?

I'm not sure if concentrated reagent in the top of the test tube would throw off the test. It's just a little tedious and time consuming swirling after every drop twenty times, if it's perfectly fine to add a few drops first and then start swirling that would help me out.

 

[mknauss]

You can add the drops slowly, should take close to one second for the drop to form on the tip and fall off, then swirl the solution after several. I would go back to one drop then swirl as you approach the assumed level of that parameter.

 

[Rocket J Squirrel]

You can avoid the whole issue and generate more consistent results by using a SpeedStir or SmartStir. Either one will make your testing easier and almost fun!

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