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
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