Abstract
Liquid smoke has been successful pabricated from mangrove Avicennia alba shell by pyrolysis method at a temperature of 400℃ for 3 hours. Liquid smoke was purified by adsorption using activated kaolinite as adsorbent. The test results showed that activated kaolinite could bring down the rancidness to become odorless and the color of liquid smoke from dark chocolate to gray colour. The composition of the liquid smoke compound was determined by using the Gass Chromatography-Mass Spectrophotometer (GC-MS) consists of 2-propanone (CAS) acetone 25.79% and furan, tetrahydro- of 10.37% and carbamic acid, monoammonium salt (CAS) ammonium carbamate of 58.46% . The LC50 value of pure liquid smoke ranging from 1000 ppm is an indication that it is not toxic and safe to use for food preservation. Activity test against the inhibition of microbial growth in fish meatballs, showed that ability. The higher the concentration of liquid smoke, the better the inhibition of microbial growth. Based on the results, it can be concluded that the liquid smoke produced from mangrove Avicennia alba shell purified by the activated kaolinite is very promising as a foodstuffs preservative
Highlights
Liquid smoke has been successful pabricated from mangrove
Liquid smoke was purified by adsorption using activated kaolinite as adsorbent
The composition of the liquid smoke compound was determined by using the Gass Chromatography-Mass Spectrophotometer (GC-MS) consists of 2-propanone acetone 25.79% and tetrahydrofuran of 10.37% and ammonium carbamate of 58.46%
Summary
Capkala dipisahkan dari pengotor dan dicuci menggunakan akuades berulang-ulang hingga dicapai filtrat pH=7. Kaolin selanjutnya dikeringkan menggunakan oven pada suhu 105°C dan dihaluskan menggunakan mortar sertadiayak menggunakan ayakan ukuran 200 mesh. Kaolin dipanaskan dalam tanur pada suhu 500°C selama 2 jam, kemudian didingingkan pada suhu ruang dan siap digunakan sebagai adsorben[8]. 2.3.Preparasi Asap Cair Murni Proses pirolisis dilakukan mengacu pada metode Paskalia et al (2017), kulit mangroveAvicennia albasebanyak 18 kg dimasukkan ke dalam reaktorpirolisisyang dilengkapi dengan kondensor serta thermostat. Suhu pirolisis diatur 400°C selama 6 jam. Asap cair kasar hasil pirolisis disaring menggunakan kertas saring Whatman No 10 hingga didapatkan supernatan[11]. Ke dalam 100 mL supernatan asap cair didispersikan 10 gr adsorben kaolin dan diaduk menggunakan pengaduk magnet, kemudiaan didiamkan selama 1 jam. Setelah tercapai kesetimbangan adsorpsi-desorpsi filtrat disaring menggunakan kertas saring whatman no 10 hingga didapatkan asap cair murni, dan siap digunakan untuk pengawetan bakso ikan
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