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Old 07-23-2012, 09:06 AM   #1 
MSG
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How to clean out those glass test tubes used in water tests

  • I just want to make sure I clean them out right so I don't get any false readings from residue.
  • Some of the glass tubes have a slight tint of blue, some are slightly purple, etc...
I have some results I haven't dumped out and they're sitting on the sill for over a week now.

  • Pipe brush with baking soda & rinse thoroughly?
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Old 07-23-2012, 10:50 AM   #2 
ao
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just hot water will do :) then allow to air dry


oh if they're beginning to stain... try Hydrogen Peroxide...? not sure :/
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Old 07-23-2012, 11:05 AM   #3 
Kenny G
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You can always soak them in distilled vinegar to clean and sanitize them.
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Old 07-23-2012, 11:19 AM   #4 
battered
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I find that if you twist a paper towel into the test tube and swivel it around to clean it, it works pretty well.
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Old 01-07-2013, 12:47 PM   #5 
avraptorhal
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Pet Mountain - packs of 24
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Old 01-07-2013, 12:55 PM   #6 
Viva
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I think just hot water will do. Vinegar will also help and is natural.

Side Question: Anyone know where to get cheap 5mL test tubes from? API makes replacement tubes but you can only buy 24 at a time for $25 (at least thats what I saw on Amazon.com). I'm looking for maybe half that amount or even less. I really only need half a dozen.
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