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Old 02-19-2010, 08:30 PM   #1
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Default stir plate vortex

First homemade stir plate in a cigar box. Cost: $5 (the 1" stir bar). Computer PSU fan with hard drive magnet. Powered by another computer PSU converted to a benchtop PSU. Current output voltage to fan is 7V (10V is too fast; the stir bar spins off). Does this look like enough vortex for a 2L sample (in a 1gal. jug)?

And this vortex for a 1L sample in a 1L flask?

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Old 02-19-2010, 08:32 PM   #2
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Just a dimple is fine.

That looks good

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Old 02-19-2010, 09:03 PM   #3
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More than enough.
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Old 02-19-2010, 09:05 PM   #4
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nice flask
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