How to prepare colistin sulfate solution for AST with ambiguous description of activity?

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Jay Prakash

10.1128/AAC.47.4.1364-1370.2003

Mariana Emilia Cozzolino

Dear Anastasia check the following link:

https://www.google.com/url?sa=t&source=web&rct=j&url=https://ncdc.gov.in/WriteReadData/l892s/82259485491600061012.pdf&ved=2ahUKEwj-hMyC1uPzAhXMqpUCHaF-BUsQFnoECDcQAQ&usg=AOvVaw2dwU2j2eZs9R5Sl-nvKz1Q

Regards

Anastasia Pavlova

Dear colleagues!

Thank you for responses from all of you. The link to Standard Operating Procedure was very helpful and we have followed this guideline in our calculations. We solved the problem with the exact value of the potency of colistin by requesting a certificate from the company and the exact potency was indicated in it.