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PRACTICAL WORK
EXAMPLE 1: POSSIBLE SOLUTION
Film thickness 100
m
LDPE density 0.945 g
cm
-3
Storage conditions: 4C
CAS 2082-79-3: 531 g
mol
-1
(CAS 31570-04-4: 647 g
mol
-1
)
C
0
= 5000 mg
kg
-1
(ppm)
D(8C) = 4.8 10
-11
cm
2
/s, 1.97
migration 2.8 mg
dm
-2
or 16.8 mg
kg
-1
SML = 6 mg
kg
-1
REDUCING FACTOR 1/5 ???
smallest additive: 214 g
mol
-1
migration: 4.7 mg
dm
-2
or 37.6 mg
kg
-1