CORRELATION OF DEMERIT POINT SCORE (DPS) AND CHEMICAL PARAMETERS ON QUALITY OF FRESH ESTUARY GROUPER (Epinephelus tauvina) DURING STORAGE IN ICE
Abstract: Quality changes of
fresh estuary grouper (Epinephelus tauvina) fish kept in ice was evaluated for
sensory and chemical parameters during 21 days of storage. Fish was killed
by immersing in ice water (hypothermia).
Fresh fish was placed in insulated boxes, and covered with ice flake. The ratio
of ice and fish was 2:1 (w/w) and the boxes were kept at ambient
temperature. Evaluation was conducted
every 3 days for sensory characteristics by Demerit Point Score /DPS for appearance,
eyes, gills, belly, vent, and belly cavity. Moreover, Total Volatile Base/TVB,
Trimethyl Amine/TMA , and the K value were measured until fish was rejected by
panelists. The results showed that estuary grouper fish stored in ice was
rejected by panelists on 21 days of storage with TVB value of 29.43 mgN%, TMA
value of 22.10mgN% and K value of 40.54% (max level of 60%). Related to
correlation between sensory and chemical parameters, it showed that Demerit
Point Score correlated well with TVB, TMA and K value.
Keywords: DPS, estuary grouper
(Epinephelus tauvina), ice storage, chemical characteristics
Author: Farida Ariyani, Yusma
Yenni, Rudi Riyanto
Journal Code: jpperikanangg140041
