I need help to find the concentrations of each tested extract for my experiment

Chemistry
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Extracts were added to DPPH at diff. concen. and the initial concentrations (stock)  of all extracts is 20 mg/ml 

Also, the all  samples had 100μL DPPH individually

The different quantities of herbal extracts were 5,10,20,35, and 50 μL  + 100 ul DPPH)

Jan 5th, 2015

5 micro l in 100 micro l.    is equal to 5/100 = 0.05 l/l concentration

10 micro l in 100 micro l is equal to 10/100 = 0.10 l/lconc

Similarly 20 = 0.2,   35 = 0.35 and 50 = 0.5 l/l

Answer: 0.05, 0.1, 0.2, 0.35 and 0.5 l/l concentration


Jan 5th, 2015

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