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10 g grasime setrateaza cu 200 g solutie de iod 10 %. Excesul de iod se poate aditiona la 0,224 l etena (c.n) . Indicele de iod al grasimii (indicele de iod al unei grasimi reprezinta grame de iod aditionat la 100 g grasime ) este : 87.3 , 174,6 , 127 , 146 , 197,3
Se determina masa de iod din 200 g solutie de concentratie 10%
100 g solutie iod.10 g iod
200 g solutie iodx
x = 20 g iod
Se determina masa de iod in exces
22,4 L.254g
CH2=CH2 + I2 I-CH2-CH2-I
0,224 L.x
x = 2,54 g iod exces
Se determina masa de iod care a reactionat
20-2,54 = 17,46 g I2Se determina cifra de iod
10 g grasime..17,46 g iod
100 g grasimex
x=174,6 g iod
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