Contents of tocols in different types of dry shell fruits
Laen...
Kuupäev
2018
Kättesaadav alates
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
The aim of this study was to identify all forms of vitamin E in different kinds of
dry
shell fruits
(generally called
‘
nuts
’
)
obtained from different sources and
to perform
their mutual
comparison
.
All tocols were determined by reversed phase HPLC using is
ocratic elution with
fluorescence detection.
Almonds were
evaluated
as
the most important source of
α
-
tocopherol
(average value 1
,
132
mg
kg
-
1
),
β
-
tocopherol was present in all samples as a minor component, its
maximum content was found in hazelnuts (9.6
mg
kg
-
1
).
γ
-
T
ocopherol was found in all kinds of
nuts and the highest content was found in pistachios (584
mg
kg
-
1
), very high amount
of
δ
-
tocopherol
was
contained in Brazil nuts (2
,
29
8
mg
kg
-
1
). Tocotrienols were found in a smaller
number of nut kinds than
tocopherols.
α
-
Tocotrienol was found only in three kinds of
nuts
-
Brazil
nuts, which contained the highest amount (399
mg
kg
-
1
), pine nuts and hazelnuts grown in the
Czech Republic, which
were
analyzed soon after harvest.
Similarly,
γ
-
tocotrienol w
as
det
ermined
only in four kinds of nuts (pistachios, macadamias, cashew
and walnuts grown in the Czech
Republic
)
, which were analyzed soon after harvest
; t
he most significant amount was found in
pistachios (34.8
mg
kg
-
1
)
,
β
-
and
γ
-
tocotrienols were below the
detection limit
. In the Czech
Republic, walnuts and hazelnuts are the most widely cultivated and consumed nuts. While in
walnuts the most important form is
γ
-
tocopherol (459
±
40
mg
kg
-
1
), in hazelnuts it is
α
-
tocopherol (
863
±
10
mg
kg
-
1
).
Kirjeldus
Article
Märksõnad
nuts, tocopherols, tocotrienols, storage, HPLC, articles