Abstract:
This study was carried to investigate the physicochemical properties of fish extracted
from (swamp eel, catfish and snakehead) and to study their fatty acid composition.
The fish essences were extracted by using aqueous extraction method where water
was added depend on weighed of fish flesh at ratio 1:1 to· get the 50% (w/v)
concentration of essences. The evaluations of fatty acid composition were done by
using GC method and were identified by using retention time. The physicochemical of
fish essences were determine by several analysis ( color, viscosity, total soluble solid,
pH and proximate composition). The results indicated that the swamp eel essence was
significantly different (L*=65.53, a*= -7.65, b*=22.82) with catfish (L*=51.14, a*= 2.33,
b*=
6.56)
and
snakehead
essences
(L*=42.88,
a*=
-1.18,
b*=5.78).
Swamp
eel
essence
recorded
the
maximum
viscosity
(2.73
Cp),
high
total
soluble
solid
(l.8
Brix)
and lowest pH (5.89). Meanwhile catfish showed the viscosity (1.73), lowest total
soluble solid (l.6
°
Brix) and pH (7.14). Snakehead essence showed the lowest value of
viscosity (0.7 Cp), highest total soluble solid (1.87
°
Brix) and pH (7.29). The
proximate composition of swamp eel essence were: moisture content 97 .16%, crude
protein 1.97%, ash 0.89% and crude fat 4.01 % while catfish essence has moisture
content 96.83%, crude protein 1.32%, ash 0.78% and crude fat 1.47%. Meanwhile a
snakehead essence has moisture content 95.53%, crude protein 2.59%, ash 0.93% and
crude fat 5.14%. Catfish and snakehead essence contained high amount of SFA
compared to UFA. Meanwhile swamp eel essence contained high amount of UFA
than SFA. Palmitoleic acid was the highest UFAcontained (40.363) in swamp eel.
Stearic acid was the major component of FA in catfish essences (55.26) while
heptadecanoic acid was the major component in snakehead essence. Due to this study,
swamp eel essence was the most acceptable compared to others.
