• Advanced Questions

  Batch Quality Control

  Posted by shellyco on December 29, 2018 at 6:56 am

  Hi,

  How do you conduct the percent solid test after a batch is completed to make sure that all ingredients have been correctly added during the production process ?

  Also, is there an affordable to test the viscosity a part from buying expensive viscometer ?

  Thanks for sharing.

  shellyco replied 5 years, 11 months ago 4 Members · 5 Replies
• 5 Replies

• 

  shellyco

  Member

  January 4, 2019 at 6:16 pm

  No one replied ! Did I something wrong ?

• 

  chemicalmatt

  Member

  January 4, 2019 at 6:57 pm

  Shelly, you did nothing wrong except suggest a bland topic, that’s all. To answer: purchase a moisture balance and program it to heat 3.00g sample in aluminum weigh dish @ 110C @ 30 minutes. That will be a reliable test, but you may still want to keep your release spec very broad (+/- 2.0%) since the error propagation can be high.  A less reliable method is to purchase a lab oven, set it to 110C and use your analytical balance. As for viscosity there is no sub for a viscometer, at least not an accurate one.

• 

  EVchem

  Member

  January 4, 2019 at 7:48 pm

  Yeah there’s been threads about some alternatives to measure viscosity here
  and here , but not sure if those will work for your application

• 

  vjay

  Member

  January 5, 2019 at 12:18 pm

  You can qualify the ingredients not quantify

• 

  shellyco

  Member

  January 6, 2019 at 9:24 pm

  Thanks my dears for sharing. I appreciate.

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