Foss Soxtec 1047, Руководство пользователя

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4
OPERATION
Total fat determinations according to most
accepted procedures include the following
main steps:
·
Hydrolysis with boiling acid
·
Cooling of solution with solubilized fat
·
Filtration
·
Drying of hydrolyzed sample residue
·
Solvent extraction
·
Drying of extracted matter
·
Weighing and calculation
Due to local reference methods, variations in
e.g. acid strength, hydrolysis time, type of
solvents etc. do occur.
Samples rich in fat (>10 %) are generally
recommended to be pre-extracted before
hydrolysis.
The following description of how to operate
the 1047 Hydrolyzing Unit in conjunction with
1043 or 1045 Soxtec Extraction Systems, is
generally based. For more detailed
information on specific types of samples,
please ask your local Foss Tecator dealer for
"Application Notes".
4.1 Preliminary preparation
In order to achieve as good results as
possible, all samples must be homogenized in a
proper way before chemical treatment.
Sample Type of milI
Dry product, e.g. Cyclone mill e.g.
grains, foods,
granulates 1093 Cyclotec.
Products high in
moisture, Knife homogenizer e.g.
fat or fibrous samples. 1094 Homogenizer or
Moulinex.
In order to make wet samples e.g. meat
products more lyphilic, a short predrying
before extraction is recommended.
1047
Soxtec
System
Hydrolyzing
Unit,
User
M
anual,
R
ev.
2.2,
Part
no
1000
3315,
Foss
Tecator
AB,
Sweden
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