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Efek Suhu dan Waktu Simpan terhadap Kualitas Bagian Tengah Yellowfin Tuna Segar (Thunnus albacares) Putra, Debriga; Dien, Henny A; Montolalu, Roike I; Onibala, Hens; Makapedua, Daisy M; Sumilat, Deiske A; Luasunaung, Alfret
Media Teknologi Hasil Perikanan Vol 8, No 3 (2020)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/mthp.8.3.2020.29537

Abstract

Decline quality of Tuna as a result of abuse temperature and long shelf life time. Histamine, microbial and sensory odours become one of the global problems that can cause health problems. Large number of bacteria dominated in viscera area rather than other fish parts. This study was conducted to determine the effect of storage temperature on histamine, microbial and sensory odours on middle of Yellowfin Tuna. This study used descriptive explorative method, sampel were periodically taken for analyses at intervals 48 hours (0ºC), 8 hours (10ºC) and 4 hours (25ºC). Yellowfin Tuna was rejected earlier by the sensory odours than TPC and histamine. During storage at 0ºC for 720 hours histamine levels still acceptable for consumption however TPC already exceeded the limit after 672 hours and rejected by sensory odours for 624 hours storage. During storage at temperature 10ºC did not reached the limit for 120 hours while TPC value already reached 2x106 cfu/g for 88 hours storage and rejected by sensory odours for 72 hours storage. During storage at temperature 25ºC histamine reached 67.3 ppm for 32 hours, ALT reached 5.5x105 cfu/g for 24 hours and rejected by sensory odour for 20 hours of storage. Histamine formation correlates with the growth of microbial counts and decrease of sensory odours value. Suhu yang tinggi dalam waktu simpan lama berpengaruh terhadap penurunan kualitas ikan tuna. Histamin, mikroba dan bau busuk menjadi salah satu permasalahan global yang dapat menyebabkan masalah kesehatan. Bagian tengah ikan menjadi sumber bakteri paling tinggi dibandingkan bagian lainnya. Penelitian ini bertujuan untuk mengkaji perkembangan histamin, ALT dan sensori bau pada bagian tengah Tuna sirip kuning dalam penyimpanan suhu yang berbeda. Penelitian ini menggunakan metode deskriptif eksploratif, sample di analisis secara berkala pada suhu 0ºC (48 jam), 10ºC (8 jam) dan 25ºC (4 jam). Tuna sirip kuning mengalami pembusukan lebih awal berdasarkan parameter sensori bau, kemudian disusul ALT dan Histamin. Kandungan histamine pada suhu 0ºC masih layak untuk dikonsumsi setelah 720 jam, namun nilai ALT melebihi batas aman setelah 672 jam penyimpanan dan nilai sensori bau setelah 624 jam penyimpanan. Penyimpanan suhu 10ºC tidak menyebabkan peningkatan histamin melebihi batas limit setelah penyimpanan selama 120 jam, sedangkan nilai ALT mencapai 2x106 cfu/g setelah 88 jam dan nilai sensori bau menyatakan ikan busuk setelah penyimpanan selama 72 jam. Penyimpanan suhu 25ºC histamin mencapai 67,3 ppm setelah penyimpanan 32 jam dan nilai ALT 5,5x105 cfu/g pada penyimpanan ke 24 jam serta ikan dinyatakan busuk berdasarkan sensori bau setelah 20 jam penyimpanan. Peningkatan histamin berkorelasi dengan pertumbuhan jumlah mikroba dan penurunan nilai sensori bau.
Pengujian TPC, Kadar Air dan pH pada Ikan Tongkol (Euthynnus Affinis) Asap Cair Yang Disimpan Pada Suhu Ruang Upet, Emanuel; Salindeho, Netty; Reo, Albert R; Montolalu, Lita; Kaparang, Josefa T; Makapedua, Daisy M; Dotulong, Verly
Media Teknologi Hasil Perikanan Vol 9, No 2 (2021)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/mthp.9.2.2021.31144

Abstract

Mackarel Tuna fish (Euthynnus affinis) is a leading commodity as a source of food for people in North Sulawesi. The purpose of this study was to process mackarel tuna (Euthynnus affinis) using liquid smoke stored at room temperature and then tested the product quality, namely) water content, total plate count (TPC), and pH value. The results of the research the resulting moisture content ranged from 35.7 to 58.3%, according to the Indonesian National Standard (SNI) 2725: 2013 that the maximum water content of smoked fish with the maximum heat smoking method was 60%, the total plate count (TPC) was around The average total plate number of smoked fish produced is 0.52 x 10-4 to 2.83 x 10-5 cabbage / g, this value shows in accordance with SNI 2725: 2013 that the total plate number of smoked fish with the maximum heat smoking method is 5 x 104 kol / g, while the average pH value is 5.64, this value shows the pH of smoked fish is below neutral pH, so it can be concluded that the smoked fish contains acid. It is concluded that this research has fully met the requirements for public consumption so that it can be produced as a fishery product.