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All Journal Alchemy : Journal of Chemistry Pharmaceutical And Biomedical Sciences Journal (PBSJ) JPM-AKA
Isna Nurhidayati
Politeknik AKA Bogor
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Health Professions Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences

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Effect of Stirring Time on Sodium Silicate Synthesis From Mount Kelud Volcanic Ash Isna Nurhidayati; Endang Tri Wahyuni; Nurul Hidayat Aprilita; Sarwendah Ratnawati Hermanto
ALCHEMY:Journal of Chemistry Vol 9, No 2 (2021): ALCHEMY JOURNAL OF CHEMISTRY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v9i2.12600

Abstract

This study performed the synthesis of sodium silicate from the volcanic ash of Mount Kelud with various stirring time in the sodium silicate synthesis process. Synthesis of sodium silicate was carried out using alkaline extraction at low temperature. This method is based on the solubility of silica under alkaline conditions and is proven to be more effective than the smelting method. The dissolution of silica contained in the volcanic ash of Mount Kelud was carried out using NaOH solution to form a Na2SiO3 solution. This process also studied the effect of stirring time on the amount of dissolved silica, with the stirring time of 0.5; 1; 1.5; 2; 2.5; 3 and 4 hours. The dissolved silica levels were tested using AAS. The amount of dissolved silica increased sharply with the longer length of stirring time, however for a stirring time of more than 2.5 hours, the dissolution was slow. The study revealed that the optimal result time was obtained from the stirring time of 2.5 hours with dissolved silica content of 19.82%. Keywords: volcanic ash, silica, sodium silicate, stirring time
Pelatihan Pembuatan Produk Body Lotion Berbahan Dasar Susu Sapi Segar Kurnia Widhi Astuti; Eva Yuliana; Isna Nurhidayati
Jurnal Pengabdian Masyarakat AKA Vol 1, No 1 (2021): Desember 2021
Publisher : Politeknik AKA Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55075/jpm-aka.v1i1.45

Abstract

Abstrak Kelurahan Kebon Pedes merupakan daerah penghasil susu murni di Kota Bogor. Ribuan liter susu segar dijual setiap harinya ke perusahaan penampung susu, namun terkadang mengalami surplus susu. Oleh karena itu dilakukan Kegiatan Pengabdian Kepada Masyarakat dalam bentuk pelatihan memproduksi produk berbahan dasar susu sapi segar, yaitu pembuatan body lotion. Tujuan dari kegiatan ini adalah meningkatkan pengetahuan tentang nilai tambah produk susu sapi segar sehingga mendorong kemandirian ekonomi masyakakat melalui produk olahan susu berbasis potensi daerah. Kegiatan pelatihan tersebut akan memberikan manfaat pada peningkatan nilai tambah susu sehingga surplus susu dapat teratasidan dapat meningkatkan perekonomian masyarakat sekitar, khususnya warga yang tidak memiliki ternak sapi. Kegiatan ini juga dapat mendorong masyarakat untuk membentuk kelompok usaha sebagai produk usaha mikro, kecil dan menengah (UMKM) kelurahan Kebon Pedes. Kata kunci: body lotion; pelatihan; susu sapi segar, surplus susu   
Aplikasi Natural Deep Eutectic Solvent (NADES) sebagai Green Solvent pada Ekstraksi Kafein dan Katekin dari Limbah Kulit Kopi Fitria Puspita; Isna Nurhidayati; Bella Mellisani; Fajar Amelia Rachmawati Putri; Anton Restu Prihadi
Pharmaceutical and Biomedical Sciences Journal (PBSJ) Vol 5, No 1 (2023)
Publisher : UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/pbsj.v5i1.32256

Abstract

Various studies have been conducted to support green industry by developing green solvents to replace organic solvents that are generally toxic, volatile, and harmful to human health and the environment. Environmentally friendly solvents that have been successfully developed in the 21st century are eutectic solvents and natural deep eutectic solvents (NADES). NADES can be formed from primary metabolites such as amino acids, organic acids, sugars, or choline derivatives, and has a high ability to extract polar, non-polar compounds, and several other secondary metabolites. The amount of waste generated from the process of separating coffee from its seeds is abundant but has not been used optimally. Coffee husk waste has the potential to be used as a food product because it contains many active substances, especially phenolic compounds such as caffeine and catechins. In this study, an NADES solvent based on choline chloride-proline (1:1) was successfully synthesized and used to extract phenolic compounds from coffee husk waste in the form of caffeine and catechins. The results of the HPLC analysis showed that the levels of caffeine and catechins extracted were 14.5 ppm and 61 ppm, respectively. Based on these results, caffeine and catechins in coffee skin waste were successfully extracted using NADES based on choline chloride – proline (1:1). 
Co-Authors Anton Restu Prihadi Bella Mellisani Endang Tri Wahyuni Eva Yuliana Fajar Amelia Rachmawati Putri Fitria Puspita Kurnia Widhi Astuti Nurul Hidayat Aprilita Sarwendah Ratnawati Hermanto