Quote:
Originally Posted by anita
It depends how you made the GA3 soluble in water., it is an insoluble acid. I might be that at a higher concentration solubility was higher thus having an effect.
At over 200ppm it should have had an effect on steam elongation.
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No, the maximum solubility of GA in water at 25 deg C is 5000 ppm. See
https://pubchem.ncbi.nlm.nih.gov/com...ion=Solubility
To facilitate dissolution, I first dissolved 1g. in about 10 ml. methanol (I eyeballed the amount of methanol) and then added the methanol solution to 1 liter of water. I also added 0.25 ml Triton X100 surfactant to prevent beading of spray on foliage.
It may interest you to know that similar procedures are used to dissolve poorly soluble flavor compounds in water, e.g., in making cola or root beer. Some of these compounds have a maximum solubility of less than 10 ppm. If you were to just dump such compounds in water, they might take years to fully dissolve. But, by first adding them to an edible, water miscible, organic solvent, e.g., propylene glycol or ethanol, they readily dissolve in water (to their maximum concentration). I know this because I am an amateur (hobby) flavorist.