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Feb 8, 2018
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Abstract

Abstract

Gumoti palm is one of health food with minimal post-harvest treatment that caused damage and limited range of distribution. The damage that Occurs in gumoti palm is brown discoloration caused by oxidation of the enzyme polyphenoloxidase (PPO). Prevention of the damage can be done by reducing the oxygen as a source of oxidation reactions. The use of packaging, soaked water and substance a citric acid can reduce enzymatic browning reactions that lead to color deterioration of gumoti palm. The purpose of this study is to examine the influence of the ratio of water, the concentration of citric acid from lime and packaging technology to discoloration on the surface of gumoti palm during storage. The first stage is the determination of the ratio of water gumoti palm and citric acid concentration of lime was best to maintain the quality. Water ratio studied were 1:1; 1:2 and 1:3 being the concentration of citric acid were 0.1%, 0.5% and 1%. Storage was at room temperature to accelerate change in the quality as a result of this preliminary study are used in the research stage into two. The second stage was to determine the packaging technology combined with materials. The variations of packaging techology by vacuum and non vacuum. Gumoti palm stored at 5OC until the sample was broken. Quality parameters measured include, color, galactomannan content, texture (hardness). The best results was gumoti palm with addition of citric acid 0.1% of lime is able to maintain color preference level is still acceptable to consumers up to 9 days of storage However the effect on the change in taste with consumer acceptance

ondy until 6 days after storage at 5OC. Packaging pouch made from PE + nylon combined with water (ratio 1: 3) and citric acid 0.1% were able to retain their galactomanan of 40.18 % to 31.48%.

 

Abstrak

Kolang kaling merupakan sumber pangan kesehatan yang masih minim perlakuan pascapanennya sehingga cepat rusak dan terbatas jangkauan pemasarannya. Kerusakan yang terjadi pada kolang kaling adalah perubahaan warna akibat reaksi oksidasi enzymatic browning. Penggunaan kemasan, perendaman air dan pemberian larutan jeruk nipis sebagai sumber asam sitrat alami dapat mengurangi enzymatic browning dan mempertahankan mutu kolang kaling. Tujuan penelitian mengkaji pengaruh rasio air dan konsentrasi asam sitrat dari jeruk nipis dan teknologi kemasan untuk mempertahankan mutu kolang kaling selama penyimpanan. Tahap pertama penelitian adalah penentuan rasio air dan konsentrasi asam sitrat dari jeruk nipis yang terbaik dalam mempertahankan mutu. Rasio air yang dikaji adalah 1:1,1:2 dan 1:3 sedangkan konsentrasi asam sitrat adalah 0.1%, 0.5% dan 1%, yang disimpan pada suhu ruang untuk mengetahui penurunan mutu selama penyimpanan. Hasil dari penelitian pendahuluan, kemudian digunakan pada tahap ke dua penelitian. Penelitian tahap ke dua adalah menentukan teknologi kemasan yang dikombinasikan dengan bahan tambahan untuk mempertahankan mutu selama penyimpanan. Teknologi kemasan yang digunakan adalah teknologi vakum dan non vakum. Kolang kaling disimpan pada suhu 5OC hingga sampel mengalami kerusakan. Parameter mutu yang di amati adalah warna, kadar galaktomanan, dan kekerasan. Hasil penelitian menunjukkan bahwa rasio air dengan kolang kaling yang terbaik adalah 1:3 dan konsentrasi larutan jeruk nipis yang terbaik adalah 0.1%. Teknologi pengemasan tidak berpengaruh terhadap perubahan, warna dan kekerasan kolang kaling dalam penyimpanan suhu 5oC sedang yang berpengaruh adalah jenis kemasan PE dan PE+nylon dengan hasil terbaik adalah kemasan PE+nylon. Kemasan pouch berbahan PE+nylon yang dikombinasikan dengan air dan asam sitrat 0.1% mampu mempertahankan kandungan galaktomanan dari 40.18% menjadi 31.48%.

Keywords

gomuti quality packaging lime galactomannan

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