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All Journal International Journal of Applied Sciences and Smart Technologies Scientica: Jurnal Ilmiah Sains dan Teknologi
Ajri, Fauziah Ulfah
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OPTIMALISASI PRODUKSI OLIGOMER DARI KITOSAN HASIL EKSTRAKSI KEPALA UDANG MENGGUNAKAN APLIKASI IRADIASI GAMMA Trisnawati, Iga; Kurniawan, Deni; Ajri, Fauziah Ulfah; Sinurat, Febriyanti
Scientica: Jurnal Ilmiah Sains dan Teknologi Vol. 2 No. 8 (2024): Scientica: Jurnal Ilmiah Sains dan Teknologi
Publisher : Komunitas Menulis dan Meneliti (Kolibi)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.572349/scientica.v2i8.2262

Abstract

Limbah kepala dan cangkang udang sering dibuang dan menimbulkan masalah lingkungan. Limbah mengandung kitin, yang dapat diolah menjadi kitosan. Iradiasi gamma meningkatkan efisiensi produksi kitosan. Ini mempercepat ekstraksi kitin menjadi kitosan dan mendegradasi kitosan menjadi oligomer. Oligomer memiliki peran penting dalam industri dan nilai jual lebih tinggi. Penelitian ini bertujuan untuk mengoptimalkan produksi oligomer dari kitosan yang diekstraksi dari limbah udang menggunakan iradiasi gamma dengan dosis iradiasi dan konsentrasi asam asetat yang optimal sebagai langkah efisiensi proses degradasi kitosan menjadi oligomer. Kitosan dipreparasi dengan deproteinasi, demineralisasi, dan deasetilasi. Validasi kitosan dilakukan dengan uji organoleptik, sifat fisis, dan FTIR, sesuai Standar Nasional Indonesia No. 7949 Tahun 2013. Oligomer kitosan dibuat dengan ekstraksi kitosan dalam asam asetat dengan iradiasi gamma pada dosis 0, 10, 20, 30, dan 50 kGy serta konsentrasi asam asetat 2%, 5%, 10%, 15%, dan 20%. Hasil penelitian menunjukkan iradiasi 50 kGy efektif mengubah kitosan menjadi oligomer.
Evaluation of Tartrazine Solution as a Potential Gamma Dosimeter Material Arumbifa, Farhansyah Yunandani; Kurniawan, Deni; Diani, Desalsa Anggoro; Praja, Dika Bhakti; Ajri, Fauziah Ulfah; Dewi, Ariyani Kusuma; Ariyanti, Dhita
International Journal of Applied Sciences and Smart Technologies Volume 06, Issue 2, December 2024
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v6i2.9283

Abstract

Radiation dosimetry plays a crucial role in various fields, including medical, industrial, and environmental applications. Accurate and reliable dosimeters are essential for measuring and controlling radiation exposure. This study aims to evaluate the stability of the food dye tartrazine as a potential gamma radiation dosimeter. The need for accessible and cost-effective dosimetric materials motivates the exploration of tartrazine's capabilities in this regard. This research investigates the response of tartrazine solutions under varying gamma radiation doses (0 to 3.118 kGy) using UV-Vis spectrophotometry to measure absorbance at a wavelength of 424 nm. The results demonstrate a significant decrease in absorbance with increasing radiation doses, indicating decolorization due to oxidative reactions triggered by hydroxyl radicals (OH·) generated during irradiation. Tartrazine, which imparts a yellow color through its diazenedyl (-N=N-) bonds, undergoes bond cleavage upon gamma radiation exposure, resulting in a permanent color change. Further analysis reveals that tartrazine-based dosimeters exhibit optimal stability for less than four weeks. Therefore, tartrazine solution can serve as an effective gamma radiation dosimeter for short-term applications. This study provides a foundation for developing new dosimetric materials, emphasizing the importance of ongoing research to enhance radiation safety and measurement accuracy.Keywords: Dosimeter, Gamma Irradiation, Radiation, Stability, Tartrazine.
Co-Authors Ariyani Kusuma Dewi, Ariyani Kusuma Ariyanti, Dhita Arumbifa, Farhansyah Yunandani Deni Kurniawan, Deni Diani, Desalsa Anggoro Praja, Dika Bhakti Sinurat, Febriyanti Trisnawati, Iga