KARAKTERISTIK SIFAT FISIKO KIMIA GELATIN HALAL YANG DIEKSTRAK DARI KULIT AYAM BROILER MELALUI VARIASI SUHU

  • Ni Made Puspawati
  • I Nengah Simpen
  • Ni Luh Putu Suciptawati

Abstract

The aim of this study was to characterize physicochemical properties of gelatin extracted from skin of chicken at different temperatures (40oC, 45oC, 50oC) for 24 hours. Pre-treatment of dry defatted skin of chicken was done with a combination of alkaline-acid solution sodium hydroxide (NaOH, 0.15%w/v), sulfuric (0.15%v/v) and citric acid (0.7%w/v) and extraction was carried out in waterbath by adding water at pH 4-5. Physicochemical properties analyzed were yield, gel strength, proximate compositions, pH and characteristicfunctional groups. Statistical analysis showed that temperatures of extraction significantly (p<0.05) affected the physicochemical properties of gelatin produced. The yield and proximate compositions increased by increasing temperatures of extractions.  The highest yield, water, protein, ash and fat content of gelatin   (based on dry weight) were obtained at 50oC and the lowest at 40oC. Conversely, gel strength of gelatin decreased by increasing the temperature of extraction. Gelatin prepared at 40oC showed the highest gel strength (114.84g bloom) which was higher than gel strength of gelatin commercial (98.81 bloom) (p<0.05) while gelatin extracted at 45oC gave the lowest value (73.44g bloom). Gelatin extracted at different temperatures had significantly different pH (p<0,05). pH value of gelatin extracted at 40oC,45oC, dan 50oC was 3,29, 3,47, and 4,29 respectively. Fourier transform infrared (FTIR) spectra of all gelatin prepared in this experiment revealed the presence of band corresponding to –OH, C-O, N-H and C-N, C=O and NCO of secondary amidewhich characteristic for gelatin functional groups.

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Author Biographies

Ni Made Puspawati
Jurusan Kimia FMIPA Universitas Udayana, Kampus Bukit Jimbaran
I Nengah Simpen
Jurusan Kimia FMIPA Universitas Udayana, Kampus Bukit Jimbaran
Ni Luh Putu Suciptawati
Jurusan Matematika  FMIPA Universitas Udayana, Kampus Bukit Jimbaran
Published
2014-01-01
How to Cite
PUSPAWATI, Ni Made; SIMPEN, I Nengah; SUCIPTAWATI, Ni Luh Putu. KARAKTERISTIK SIFAT FISIKO KIMIA GELATIN HALAL YANG DIEKSTRAK DARI KULIT AYAM BROILER MELALUI VARIASI SUHU. Jurnal Kimia (Journal of Chemistry), [S.l.], jan. 2014. ISSN 2599-2740. Available at: <https://ojs.unud.ac.id/index.php/jchem/article/view/9758>. Date accessed: 25 sep. 2020. doi: https://doi.org/10.24843/JCHEM.2014.v08.i01.p20.
Section
Articles

Keywords

chicken skin Broiler, gelatin, gel strength, thermal gravimetric analysis, citric acid

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