I am working on oil in water emulsion. i wanted to know that if i make a 250 ml emulsion of 60% oil and 40% water containing 1000 ppm surfactant and remove 50 ml from it for stability analysis. so i am left with 200 ml containing 60% oil and 40% water with some surfactant while rest of the surfactant in 50 ml sample i removed. so inorder to convert the 200ml of 1000 ppm surfactant emulsion to 2000 ppm emulsion, I just need to add required extra surfactant according to total volume i.e. 200 ml. is this the right way? i am assuming complete mixing since i am mixing for 1 hour
If you have a homogeneous stable emulsion, then do not add anything. If the emulsion is not uniform and not stable, then you need to prepare a new emulsion each time according to standard conditions.
Just use the proportion. Will there be a multiple emulsion after adding a new portion of surfactant and mixing - rather not. It is very important here to choose the right emulsifier and proper stabilization of this type of emulsion. Regards,
You posted the same question on RG 3 times. Plz, remove the duplicates.
' I just need to add required extra surfactant ' - ideally you remove part of the continuous phase for dilution. It's surfactant content is different from the overall surfactant content because depending on droplet size distribution considerable amount is adsorbed onto oil droplets or even distributed into the oil phase.
Should be better to dilute with plain water.
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