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All Journal VALENSI CHEMISTRY PROGRESS PROSIDING SEMINAR KIMIA Jurnal Kimia Mulawarman Science and Technology Indonesia Indonesian Journal of Chemistry Jurnal Riset Teknologi Industri JURNAL KIMIA SAINTEK DAN PENDIDIKAN Molekul: Jurnal Ilmiah Kimia Jurnal Sains dan Kesehatan
Subur P Pasaribu
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics

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Penentuan Total Flavonoid Content (TFC) dan Aktivitas Antioksidan Tumbuhan Insulin (Smallanthus sonchifolius): Determination of Total Flavonoid Content (TFC) and Antioxidant Activity of Insulin Plants (Smallanthus sonchifolius) Erwin, Erwin; Febrianti, Irna; Pasaribu, Subur P.; Aziz, Abdul
Jurnal Sains dan Kesehatan Vol. 6 No. 4 (2024): J. Sains Kes.
Publisher : Fakultas Farmasi, Universitas Mulawarman, Samarinda, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25026/jsk.v6i4.2360

Abstract

Smallanthus sonchifolius or known by the local name Insulin or Yacon is a traditional medicinal plant commonly used to treat diabetes. Apart from being a diabetic drug, insulin also has the potential to have antioxidant, anticancer, and anti-melanogenic activities. The aim of the study was to determine total flavonoid content (TFC) and DPPH radical scavenging of Insulin bark and stem wood extracts using UV-Vis spectrometry. The calculation results show that the total flavonoid content equivalents to quercetin in Insulin bark and stem wood extracts is 29.2 and 210.2 mg QE/g extract, respectively, while the DPPH radical scavenging test results are 80.01 and 58.85 ppm, respectively. Both the TFC and the antioxidant properties of the stem wood extract were higher than that of the Insulin bark extract. Keywords:          Smallanthus sonchifolius, insulin, TFC, traditional medicine   Abstrak Smallanthus sonchifolius atau dikenal dengan nama lokal Insulin atau Yacon adalah tanaman obat tradisional yang biasa digunakan untuk pengobati penyakit diabetes. Selain sebagai obat diabetic, Insulin juga berpotensi memiliki aktivitas antioksidan, antikanker, dan anti-melanogenik. Tujuan penelitian adalah untuk menentukan total flavonoid content (TFC) dan peredaman radikal DPPH dari ekstrak kulit dan kayu batang Insulin menggunakan spektrometri UV-Vis. Hasil perhitungan menunjukkan total flavonoid content yang setara dengan quarcetin pada ekstrak kulit dan kayu batang Insulin adalah 29,2 dan 210,2 mg QE /g ekstrak, secara berturut-turut, sedangkan hasil uji peredaman radikal DPPH adalah 80,01 dan 58,85 ppm, secara berturut-turut. Baik TFC maupun sifat antioksidan ekstrak kayu batang lebih tinggi dibandingkan dengan ekstrak kulit batang Insulin. Kata Kunci:         Smallanthus sonchifolius, insulin, TFC, obat tradisional
Gas-Liquid Separator Modified on CV-AAS System for Determination of Total Hg in the Industrial Wastewater Samples Sujito, Sujito; Pasaribu, Subur P; Wirawan, Teguh; Panggabean, Aman Sentosa
Molekul Vol 17 No 3 (2022)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2022.17.3.5039

Abstract

The research about the utilization of modified gas-liquid separators in the determination of Hg ions by using the Cold Vapor Atomic Absorption Spectrophotometer (CV-AAS) method has been done. To optimize the measurement results, several parameters that affect the hydride generator have been studied. Some specified essential parameters are the type and concentration of acid, the level of SnCl2 as a reducing agent, sample volume and the analytical performance such as linearity (r), detection limit (LOD) and quantitation limit (LOQ), repeatability (% RSD), and accuracy have been studied. The results of the research showed the gas-liquid separator modified can be used instead of commercial gas- liquid separators. It was showed by the repeatability value as % RSD < 2/3 CV Horwitz values, the LOD was 0.2530 μg/mL, and the LOQ was 0.8432 μg/mL. The accuracy of this method was good shown by a recovery percentage of 101.6%. Based on the result of this research, the modified of gas-liquid separator can be used for the determination https://www.adenomyosisadviceassociation.org/hysterectomy of Hg ions by using the CV-AAS method with valid results
VALIDASI METODE WALKLEY-BLACK UNTUK PENETAPAN C-ORGANIK PADA SAMPEL TANAH MENGGUNAKAN SPEKTOFOTOMETRI UV-VIS Gladys Carmia Puspita; Subur P. Pasaribu; Aman Sentosa Panggabean
PROSIDING SEMINAR KIMIA Vol 4 No 2 (2025): Prosiding SNKT 2025
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

The determination of organic carbon (C-organic) content in soil is an important indicator for evaluating soil fertility and environmental quality. This study aims to validate the Walkley–Black method using UV-Vis spectrophotometry for the determination of C-organic content in oil palm plantation soil. The analysis was carried out through the oxidation of organic matter using K₂Cr₂O₇ under acidic conditions, and the reduction of Cr⁶⁺ to Cr³⁺ ions was measured at a wavelength of 587 nm. The validation parameters evaluated included linearity, accuracy, precision, limit of detection (LOD), and limit of quantification (LOQ). The calibration curve produced a linear regression equation of y = 0.0016x + 0.0044 with an R² value of 0.9967, indicating excellent linearity. The accuracy test resulted in an average recovery of 98.09%, which falls within the AOAC acceptance range (80–115%), while the precision test yielded an RSD value of 1.50%, showing high repeatability. The calculated LOD and LOQ values were 1.3669 ppm and 3.3407 ppm, respectively, indicating good sensitivity. Based on these results, the Walkley–Black method using UV-Vis spectrophotometry meets analytical validation criteria and is reliable and efficient for determining organic carbon content in oil palm plantation soil. Keywords: Walkley–Black, C-organic, UV-Vis spectrophotometry, Method validation, Soil
REVIEW ARTIKEL: PEMANFAATAN GLUKOMANAN UMBI PORANG SEBAGAI EDIBLE FILM DENGAN PENAMBAHAN EKSTRAK TANAMAN SEBAGAI AGEN ANTIBAKTERI DAN ANTIOKSIDAN Amanda Salwa Nur Azizah; Subur P. Pasaribu; Aman Sentosa Panggabean
PROSIDING SEMINAR KIMIA Vol 4 No 2 (2025): Prosiding SNKT 2025
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

The increasing global production of plastics has caused serious environmental impacts due to their non-degradable nature. Therefore, eco-friendly packaging alternatives such as edible films (EF) based on natural biopolymers are needed. Glucomannan derived from porang tubers (Amorphophallus muelleri Blume), also known as Konjac Glucomannan (KGM), is one of the most promising biomaterials because it is biodegradable, non-toxic, and easily forms elastic films. The purpose of this review is to examine the potential of glucomannan as a base biomaterial for EF and the role of adding plant extracts as antibacterial and antioxidant agents. The review was conducted through an analysis of recent literature on the physical, chemical, and functional characteristics of KGM-based EF with the addition of natural bioactive compounds. The results show that the combination of glucomannan and plant extracts enhances the mechanical properties, water vapor resistance, and antibacterial activity of the film. In addition, the antioxidant activity increases with the incorporation of phenolic and flavonoid compounds, which effectively suppress oxidation and extend the shelf life of food products. Overall, KGM-based EF enriched with plant extracts has strong potential as an active and functional packaging material that supports sustainability and could replace conventional plastics in the future Keywords: glucomannan; tuber porang; edible film; antimicrobial; antioxidant.
MINI REVIEW: PEMANFAATAN GLUKOMANAN UMBI PORANG SEBAGAI EDIBLE PACKAGING DENGAN PENAMBAHAN EKSTRAK TANAMAN SEBAGAI BIOINDIKATOR MASA SIMPAN BAHAN PANGAN Arif Nur Sho’im; Subur P. Pasaribu; Aman Sentosa Panggabean
PROSIDING SEMINAR KIMIA Vol 4 No 2 (2025): Prosiding SNKT 2025
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Edible packaging based on biopolymers offers an innovative solution to the problem of conventional plastic packaging waste that is difficult to degrade. Glucomannan from porang tuber (Amorphophallus muelleri Blume) is a natural biopolymer with great potential as a material for making edible packaging because it is biodegradable, safe, has good mechanical properties, and is sustainable. Glucomannan-based films can maintain the quality and extend the shelf life of food products. Further development is carried out through the integration of plant extracts containing anthocyanins as smart indicators to detect the freshness of food materials. Anthocyanins have high sensitivity to pH changes, allowing color changes in the packaging as the food quality degrades due to microbial activity. Thus, the combination of glucomannan and anthocyanins can produce smart edible packaging that is not only environmentally friendly but also capable of providing real-time visual information on the freshness of food products. Keywords: Edible packaging, glucomannan, konjac, anthocyanin, pH indicator.
Penentuan Validasi Metode Analisa Kadar Tinbal (Pb) Pada Kosmetik Berbagai macam merek dengan menggunakan Spektrofotometer UV-Visible Amelia Putri; Ika Yekti Lianasari; Aman Sentosa Panggabean; Subur P. Pasaribu; Bohari Bohari
JURNAL KIMIA MULAWARMAN Vol 22 No 2 (2025)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v22i2.1291

Abstract

Penelitian tentang validasi metode penentuan kadar timbal (Pb) pada kosmetik menggunakan spektrofotometer UV-Visible telah dilakukan. Validasi metode dilakukan dengan menentukan parameter validitas yang diuji antara lain yaitu uji linieritas dengan nilai koefisien korelasi sebesar 0,9998; limit deteksi 0,161 mg/L, limit kuantitasi 0,537 mg/L, uji akurasi diperoleh dengan persentase perolehan kembali yang memenuhi syarat keberterimaan yaitu 81,5-93,7% dan uji presisi untuk semua konsentrasi secara keseluruhan masih dapat diterima yaitu < 2%; serta nilai RSD yang diperoleh lebih kecil dari 2/3 CV Horwitz. Hasil analisis dari sembilan sampel diperoleh ada satu sampel yang tidak memenuhi syarat yaitu pada kode sampel B2 dengan kadar timbal sebesar 26,6 mg/kg, sehingga tidak aman untuk digunakan. Sedangkan untuk sampel lainnya masih dinyatakan aman karena memiliki kadar timbal dibawah baku mutu cemaran yang telah ditentukan BPOM yaitu ≤ 20 mg/kg.
Co-Authors Abdul Aziz Ade R. Fajaryantie Aman S. Panggabean Aman Sentosa Panggabean Aman Sentosa Panggabean Amanda Salwa Nur Azizah Amelia Putri Andi Fatmawati Padri Hasanah Anggun Ridha Avitri Anggun Ridha Avitri Anwar, Adliah Arie Novadiana Arie Novadiana, Arie Arif Nur Sho’im Az-zahraa, Mutiara Nur Bagus Muliawan Bohari Bohari Bohari Bohari Bonita Tahir Buchari Buchari Chairul Saleh Daniel Daniel Daniel Daniel T Daniel T, Daniel Djihan Ryn Pratiwi, Djihan Ryn Erwin - Erwin - Erwin Erwin Erwin Erwin Eva Marliana, Eva Fadilah Ramadhani Fahmi, Miraz’hul Farida Kristiana Febrianti, Irna Gladys Carmia Puspita Hairus Abdullah Hardy Shuwanto Ika Y. L. Sari Ika Yekti Lianasari Ika Yekti Lianasari Indra Masmur Irna Febrianti Jamaran Kaban Jenni Lie Josephine Josephine, Josephine Juntia Kirana Pratiwi Kasmirul Ramlan Sinaga M. Bachri Amran Magdaleni, Agustina Rahayu Margaretta D. R. N. S Masmur, Hestina Mayang, Julia Agustin Mimpin Ginting Muhammad Robiansyah Nanang Tri Widodo Ningrum, Tika Setia Noviyanti Y Noviyanti Y, Noviyanti Nur, Nana Septiana Nurhasanah Nurhasanah Oktavia, Dwina Putri Putri Istiyanti Putri Istiyanti, Putri Rachmat, A. Khafifah Dwi Rico Ramadhan, Rico Rita Hairani Ritson Purba, Ritson Rohmat Hidayat Rohmat Hidayat Rudi Kartika, Rudi Ruga, Ritbey Rumengan, Nur Khamillah Saibun Sitorus Saleh, Chairul Shintia Alifah R Sujito Sujito Teguh Wirawan, Teguh Wahidatul Nuriah Winni Astuti Wirdhaningsih Wirdhaningsih Yusuf, Irfan Maulana Zia Rahmana Putra