I know it's redundant, so I'm sorry to ask, but how are people measuring proper dosages? 1 drop seems a bit crude; I purchased kordon's solution btw. Thanks
Get a graduated dropper, pipette, or syringe. You can also do the measurement in ml.
Ok, so what is the best way to measure it out?
2.303% is the percent of mass for a standard solution for fish tanks (Kordon, for example). Pharm grades could be 1% or 2%. 1mL is approx equal to 1 gram. Therefore, 1mL contains 23.03mg of Mehtylene Blue. All you really have to do is divide it once or twice to get 60mcg. For example, you could divide it by 20, as in add 1mL to 19mL of water, giving you 1.15mg per mL, then take 1mL from that solution and divide by 19, adding it to 18mL of water, giving you about 60.6mcg per mL. Then all you have to do is drop 1mL of the final solution into some water and then you have a serving of 60mcg.
That's one way of doing it, and a pretty precise way of doing it.
You could also just do what I did and dilute 5mL of 2.303% in 90mL and take a drop as a serving (read a few pages back for math). I do it this way because it is less work, and methylene blue is quite nontoxic at anything under 200mg, so messing up even 100% around 60mcg isn't going to matter to your health.
According to Kordon's instructions, a teaspoon in 10 gallons of water would yield 3 ppm of MB. This means that 2.303% is not a % mass and is actually a molar %.** Those dosing with MB according to my previous assumptions and instructions above will be dosing almost 18x higher than they realize, potentially posing a problem in serotonin toxicity and cardiovascular side effects. Actual concentration is 409mg of MB per 1 mL (0.02303*319.85/18.01528*1000).
This can be confirmed by manufacturer or even measuring the weight per mL. If this is a molar % as it seems to be claiming, it should weight approximately ((1-0.02303)*18.01528+0.02303*319.85)/18.01528 = 1.38585320914246 grams per mL.
Sorry to all. Please dose accordingly.
**My math for this is 1[teaspoon]/(768[teaspoons/gallon]*10[gallons])*10^6[ppm]*0.02303[mol/mol] = 2.99869791667 ppm**
Edited by devinthayer, 10 July 2016 - 06:52 AM.