PENGARUH PELAPISAN KITOSAN TERHADAP SIFAT FISIK DAN KIMIA TOMAT SEGAR (Lycopersicum pyriforme) PADA BERBAGAI TINGKAT KEMATANGAN
ABSTRACT: Tomato fruit
undergoes many physicochemical changes after harvest caused by the process of
metabolism. The method used
to inhibit the
metabolic processes in
tomatoes can be
overcome by controlled
atmosphere storage. However, this method requires a high cost. Therefore
there is another method that is more practical and economical to imitate the
mechanism of the controlled atmosphere is by the use of coating materials
(coating). Coating material must be able to form a barrier layer of the loss of
water content and can maintain fruit quality and does not pollute the
environment. Chitosan is a natural alternative as a coating material that is
non-toxic and safe for health. This study aimed to observe the effect of
chitosan coating on quality and shelf life of fresh tomatoes at different maturity
levels. The study
design used was
completely randomized design
(CRD) factorial with
two factors. The factor I was the maturity stages which consisted of 3
(three) levels : K1 = full green (0-10% red skin), K2 = light red (30-60% red
skin), K3 = ripe ( > 70% red skin). Factor II is storage duration which
consisted of 5 (five) level : P1 = 0 day, P2 = 5 days, P3 = 10 days, P4 = 15
days, P5 = 20 days, with 2 (two) replications. The analysis conducted on
tomatoes were weight loss, solusble solids concentration, total acid, and
vitamin C. The results showed that the tomatoes were coated chitosan could
inhibit weight loss, soluble solids concentration, total acid, and vitamin C
than untreated tomatoes (control). Chitosan coating with a concentration of 1%
and a long soaking for 10 minutes on the tomatoes with the maturity stages of
0-10% skin red and 30-60% skin red could maintain in good condition for 20 days
of storage. But the tomatoes with the maturity stage > 70% red skin only able
to survive 10 days of storage.
Keywords: coating, chitosan,
tomatoes, maturity stage
Penulis: Melly Novita,
Satriana, Martunis, Syarifah Rohaya, dan Etria Hasmarita
Kode Jurnal: jppertaniandd120112
