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Thread: mg and mcg dosages and dilution question

  1. #1

    Default mg and mcg dosages and dilution question

    I know this is a photography forum, but I know there are a lot of really knowledgeable people here that might be able to help, and I was hoping to clarify something.


    OBJECTIVE: To get 78mcg of X in working solution that's easy to measure accurately

    The stock strength of the supplied component is: 10mg/ml or 1ml = 10,000 mcg. Is that correct?



    To get 78mcg, I'll need:

    1ml / 10,000 x 78 = 0.0078ml of X

    To draw 0.0078ml accurately is not possible, and the margin of error is too great.



    If I take 1 ml of X (10,000mcg) and add 100ml of water, I will be diluting it to the power of 100x.

    So now I have 101ml of working solution which contains 10,000 mcg of X.



    If I want 78 mcg of X, I draw

    101ml / 10,000 x 78 = 0.7878ml of the working solution.


    Is that correct?



    My allowed margin of error is speced at 10x the recommended dosage NAD and >16x with possible adverse reactions, but I really want to get it as accurately as possible.
    Last edited by Dream Merchant; 23rd March 2010 at 07:58 PM.

  2. #2
    Senior Member giantcanopy's Avatar
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    Default Re: mg and mcg dosages and dilution question

    Quote Originally Posted by Dream Merchant View Post
    I If I take 1 ml of X (10,000mcg) and add 100ml of water, I will be diluting it to the power of 100x.

    So now I have 101ml of working solution which contains 10,000 mcg of X
    Chris you can add 99mls of water to the 1 ml to make up a dilution of 100 to simplify and draw 0.78mls at the end.

    ryan

  3. #3

    Default Re: mg and mcg dosages and dilution question

    Thanks Ryan!

    I wanted to make sure I got that right, considering the margins involved.

    CHEERS!

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