Melted Chocolate

Discussion in 'Supporting Chemistry' started by JHRoss, Jul 22, 2019.

  1. Hi all,

    Any ideas of how to clean boiling tubes that have a precipitate of chocolate? This was an ex-melted chocolate that now is frozen and stuck to the bottom of the boiling tube.

    Regards
     
  2. I have had some success in the past by soaking in biological washing powder. I assume the enzymes digest the residue.
     
  3. Just a suggestion (I occasionally have been known to have some good ones) why not melt the chocolate on Watch Glasses? To clean them simply place in the Freezer Compartment , bring out when frozen and scrape off. I'm sure that you'll agree that this is much easier than getting into Test Tubes.:D:D
     
    Last edited: Jul 24, 2019
    Sandrine Bouchelkia likes this.
  4. watch glasses sound good to me. We use tin lids
     
    GeorgetheScienceTech likes this.
  5. Nice idea Yelnats. Any suggestions that remove tedious tasks from the work of a Technician sound good to me. Happy holidays (when you start them).:D
     
  6. try 1-2% NaOH in the dishwasher, it is what they use in Clean-in-place (CIP) systems in food plants. If that wont shift it try an acid wash first.
     
  7. Dod

    Dod

    Long thin tongue perhaps?
     
  8. That would be the ideal...
     
  9. Eventually I put in the tubes some Sulfuric Acid (2M) and now wait patiently