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All Journal VALENSI Jurnal Bahan Alam Terbarukan Jurnal Matematika & Sains SEMIRATA 2015 REKAYASA PROSIDING SEMINAR KIMIA REPOSITORY KIMIA KOVALEN: Jurnal Riset Kimia Jurnal Kimia Mulawarman ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Chemistry JURNAL ATOMIK Chemistry Indonesian Journal of Chemical Research Molekul: Jurnal Ilmiah Kimia JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Aman Sentosa Panggabean
Department Of Chemistry, FMIPA MUlawarman University-Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics

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OPTIMASI KINERJA ANALITIK PADA PENENTUAN SURFAKTAN ANIONIK DALAM SAMPEL AIR ALAM MENGGUNAKAN METODE MBAS (Methyl Blue Active Subtance) Rani Novia Ulya; Bohari Yusuf; Aman Sentosa Panggabean
JURNAL ATOMIK Vol 1 No 1 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

 Penelitian tentang optimasi kinerja analitik pada penentuan surfaktan analitik pada penentuan surfaktan anionik dalam sampel air alam menggunakan metode MBAS (Methyl Blue Active Subtance) telah dilakukan. Penelitian ini bertujuan mengetahui titik optimum dari surfaktan anionik dengan menggunakan metode MBAS yang telah dioptimasi kinerja analitiknya. Dilakukan metode optimasi pada pengaruh Cloroform dan pH dimana surfaktan anionik bereaksi dengan warna biru metilen dan diukur dengan spektrofotometer UV-Vis dengan panjang gelombang 637 nm. Diperoleh volume Cloroform yang optimal adalah 10 mL dengan pH optimal adalah pH 4. Lalu dilakukan proses kinerja analitik, metode ini sangat baik untuk menganalisis surfaktan ditunjukkan dari pengukuran nilai batas deteksi sebesar 0,3394 ppm, dengan tingkat kebolehulangan yang diyatakan dengan nilai presentase koefisien variasi sebesar 2,33%. Metode ini dapat diaplikasikan untuk analisis surfaktan pada sampel air dari lingkungan dengan nilai perolehan kembali > 95%, menggunakan teknik spike menunjukkan bahwa matriks sampel yang berasal dari sungai Mahakam tidak mempengaruhi hasil pengukuran. Kata Kunci: Kinerja Analitik, Surfaktan, MBAS
Pengembangan Metode Rapid Test Preparation Dalam Penentuan Kadar Inherent Moisture dan Total Sulfur Dengan Menggunakan Metode yang Dipergunakan oleh ISO (International Organization for Standardization)) Lumban Gaol Veronica Destiana; Aman Sentosa Panggabean; Rudi Kartika
JURNAL ATOMIK Vol 2 No 1 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

The research about the development of rapid test method in determination of inherent moisture concentration and total sulfur which used by the ISO (International Organization for Standardization) has been diving. This research aims to determine is the rapid test method could be used to analyze inherent moisture and total sulfur to determine the analytical performance of the rapid test. Parameters of the validation used in this research are accuracy which described in percent of recovery as the percent of the recovery of inherent moisture are 99,98 % and total sulfur value are 98,57 %, precision described in coefficient of the variant which gained in inherent moisture are 0,49% and total sulfur value is 4,1%. Robustness of method is described in the variation of drying time, which accuracy and precision do not affect by time variation in preparation. The results show that rapid test method can be used for an alternative method which used by the ISO.
Sintesis Silika Gel dari Abu Sekam Padi Termodifikasi Kitosan serta Aplikasinya sebagai Adsorben Methylene blue Harum Widyastuti; Aman Sentosa Panggabean; Dirgarini Julia Nurlianta Subagyono
JURNAL KIMIA MULAWARMAN Vol 19 No 2 (2022)
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.v19i2.933

Abstract

ABSTRACT Synthesis of silica gel from chitosan-modified rice husk ash and its application as an adsorbent of methylene blue have been studied. The stages of this research included the preparation of rice husk samples, the synthesis of silica ash of rice husks, sodium silicate, chitosan solution, and synthesis of silica gel - chitosan - tripolyphosphate, and the characterization of silica gel material from chitosan-modified rice husk ash. The results showed that silica gel adsoerben from chitosan modified rice husk ash was able to adsorb methylene blue dyes with an optimum pH of 5, optimum contact time for 60 minutes and adsorption capacity of 16.4554 mg/g. Keywords: rice husk, silica gel, chitosan, methylene blue.
PERBANDINGAN PENENTUAN KADAR PROKSIMAT DALAM BATUBARA MENGGUNAKAN METODE GRAVIMETRI KONVENSIONAL DAN THERMOGRAVIMETRIC ANALYSIS Muhammad Robiansyah; Subur P. Pasaribu; Aman Sentosa Panggabean
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 5 No 2 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Research on the comparison of the determination of proximate levels in coal using conventional gravimetric methods and Thermogravimetric Analysis (TGA) through comparative tests has been carried out. This study aims to determine the comparison of the average analysis results using the t-test, the precision level of analysis results of each method using CV Horwitz, and the comparison of the precision level of the analysis results using the F test. Based on the results of the t-test showed a significant difference in the average analysis results between the two methods for all parameters. In the test using CV Horwitz for parameters of inherent moisture, volatile matter and fixed carbon using both methods and also ash content using the conventional gravimetric method was declared to meet the precision requirements, but for the ash content parameter using TGA instruments was stated otherwise. The F test for parameters of ash content and inherent moisture showed a significant difference in the precision level of the analysis results between the two methods, but for the parameters of volatile matter and fixed carbon was stated otherwise.
PERBANDINGAN KINERJA ANALITIK HASIL PENENTUAN ION LOGAM Pb DENGAN MENGGUNAKAN SPEKTROFOTOMETER SERAPAN ATOM DI BERBAGAI LABORATORIUM SAMARINDA arifin syam syam; bohari Yusuf; Aman Sentosa Panggabean
JURNAL ATOMIK Vol 6 No 2 (2021)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

The study about the comparison of analytical performance of the determination of Pb metal ions using Atomic Absorption Spectrophotometer in various laboratories in samarinda has been conducted. The validated methods are linearity, detection limits, quantity and precision limits. The results showed, a standardized regression test obtained by laboratory A, a value of R2 ≥ 0.4103, laboratory B a value of R2 ≥ 0.983 and laboratory C, a value of R2 ≥ 0.000. The detection limit found at laboratory A was 0.6728 µg/L, laboratory B was 0.1989 µg/L and laboratory C was 0.0001 µg/L. The quantization limit obtained by laboratory A was 0.6817 µg/L, laboratory B was 0.6063 µg/L and laboratory C was 0.0001 µg/L. The precision test of laboratory A was 7.2208, laboratory B was 5.4557 and laboratory C was 0,000. The result of determining Pb of gas station soil samples in laboratory A is 0.737 µg/L and laboratory B is 0.391 µg/L, so that means they have exceeded the quality standards set by the Indonesian National Standard (INS).
PERBANDINGAN PENENTUAN KADAR PROKSIMAT DALAM BATUBARA MENGGUNAKAN METODE GRAVIMETRI KONVENSIONAL DAN THERMOGRAVIMETRIC ANALYSIS Muhammad Robiansyah; Subur P. Pasaribu; Aman Sentosa Panggabean
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 5 No. 2 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Research on the comparison of the determination of proximate levels in coal using conventional gravimetric methods and Thermogravimetric Analysis (TGA) through comparative tests has been carried out. This study aims to determine the comparison of the average analysis results using the t-test, the precision level of analysis results of each method using CV Horwitz, and the comparison of the precision level of the analysis results using the F test. Based on the results of the t-test showed a significant difference in the average analysis results between the two methods for all parameters. In the test using CV Horwitz for parameters of inherent moisture, volatile matter and fixed carbon using both methods and also ash content using the conventional gravimetric method was declared to meet the precision requirements, but for the ash content parameter using TGA instruments was stated otherwise. The F test for parameters of ash content and inherent moisture showed a significant difference in the precision level of the analysis results between the two methods, but for the parameters of volatile matter and fixed carbon was stated otherwise.
ANALISIS KADAR MERKURI (Hg) DALAM AIR SUNGAI MENGGUNAKAN METODE COLD VAPOR-ATOMIC ABSORPTION SPECTROPHOTOMETRY (CV-AAS) Margaretta D. R. N. S; Subur P. Pasaribu; Aman Sentosa Panggabean
PROSIDING SEMINAR KIMIA Vol 1 No 1 (2022): Prosiding SNK 2022
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Analysis of mercury (Hg) levels in river water using the cold vapor-atomic absorption spectrophotometry (CV-AAS) method has been carried out. The basic principle of determining Hg in several river water samples is carried out by means of Hg2+ ions being reduced by reductants Sn2+ into gaseous Hg0 atoms, and then the Hg0 atomic vapors were analyzed quantitatively by the CV-AAS method at a wavelength of 253.7 nm. The analytical performance of the measurements obtained was very good, indicated by the linearity value (r) = 0.991, the Quality Control (QC) value) Hg is below the standard, which is 10%, and the results of mesurement of Hg levels in water samples around range concentration was -1.0305 sampai -0.7328 ppb. These results indicate that the Hg level in river water, according to Government Regulation No. 22 of 2021 concerning Implementation of Environmental Protection and Management, is below the threshold of the quality standard. Keywords: Hg, cold vapor-atomic absorption spectrophotometry (CV-AAS), River waters
PEMBUATAN DAN KARAKTERISASI EDIBLE FILM GALAKTOMANAN DARI BUAH NIPAH (Nypa fruticans Wurmb) DENGAN INKORPORASI EKSTRAK METANOL DAUN TAHONGAI (Kleinhovia hospita L.) SEBAGAI ANTIOKSIDAN Shintia Alifah R; Subur P. Pasaribu; Erwin Erwin; Aman Sentosa Panggabean
PROSIDING SEMINAR KIMIA Vol 1 No 1 (2022): Prosiding SNK 2022
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Fabrication and characterization of edible films from galactomannan nipah fruit (Nypa fruticans Wurmb) with the incorporation of methanol extract of tahongai leaf (Kleinhovia hospita L.) as an antioxidant has been conducted. This study aims to determine the best concentration of methanol extract of tahongai leaves to increase the antioxidant activity of edible films using the DPPH (1,1-diphenyl-2-picrylhydrazyl) method. The results showed that the edible film containing galactomannan 1.5%, glycerol 25% and methanol extract of tahongai leaves with concentrations of 0%, 1%, 2%, 3% and 4% showed antioxidant activity with IC50 values of 224.02 mg/L, 215.82 mg/L, 153.51 mg/L, 129.48 mg/L and 107.87 mg/L respectively. The concentration of incorporation of methanol extract of tahongai leaves to produce the best edible film is 3% which increases antioxidant activity when compared to edible films without incorporation with properties having a moisture content of 15.04%, thickness of 0.21 mm, water vapor transmission of 43.70 g/m2/hour and SEM (Scanning Electron Microscopy) analysis showed the surface morphology was homogeneous and slightly rough. Keywords : Edible film; Galactomannan; Tahongai leaves; Antioxidant activity
PEMBUATAN SILIKA GEL DARI ABU AMPAS TEBU (Saccharum Officinarum) DAN APLIKASINYA UNTUK ADSORPSI ION Cu (II) Muhammad Rizky; Alimuddin Alimuddin; Aman Sentosa Panggabean
JURNAL KIMIA MULAWARMAN Vol 20 No 1 (2022)
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.v20i1.799

Abstract

The research of silica gel manufacturing from cane pulp cinders (Saccharum Officinarum) and the application for Cu (II) ion adsorption has been done. The adsorption of Cu (II) ion done by some variaties, such as pH, concentration, and contact time. The result of the research shows the optimum of pH was 8, concentration optimum was 8 ppm, and contact time was 75 minutes. The perecentage of recovery was 90,28%, shows the effectivity of silica gel from cane pulp cinders can be applicated for adsorption Cu (II) ion.
EKSTRAKSI DAN PREPARASI GLUKOMANAN UMBI PORANG (Amorphophallus muelleri Blume) SEBAGAI EDIBLE FILM Juntia Kirana Pratiwi; Subur P. Pasaribu; Chairul Saleh; Aman Sentosa Panggabean
PROSIDING SEMINAR KIMIA Vol 1 No 2 (2023): Prosiding SNKT II 2022
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Glucomannan extracted from porang tubers (Amorphophallus muelleri Blume) can be used as a raw material for made edible films. In this research, extraction of glucomannan with graded ethanol method resulted in a yield of 10% and the composition of the edible film forming solution used was 6% glucomannan porang tubers and 25% (w/w) glycerol. The resulted edible film was clear and transparent with the characteristics tested are water content, thickness and water vapor transmission respectvely 20.16%, 0.15 m2 and 22.89 g/m2/hour. Based on the results of SEM analysis showed that the surface of the edible film of glucomannan porang tubers, the morphology of the surface was somewhat smooth but still less homogeneous. So, efforts are still needed to improve the characteristics so that to acording the required standards Keywords: Preparation, edible film, glucomannan, porang tubers
Co-Authors -, Yasrin Adha, Laila Sufina Adhi Surya Pranata Surya Pranata Adhi Surya Pranata Surya Pranata, Adhi Surya Pranata Surya Adhitya Rinaldi Akhmad Rifani Akkas, Erwin Ali Murtopo Alimuddin Alimuddin - Alimuddin Alimuddin Alimuddin Alimuddin Alimuddin Alimuddin Alimuddin Alimuddin Alya Yuni Maulana Amrina Rosyada Anggun Ridha Avitri Ani Trisnawati Anwar, Adliah Arif, Moh. Syaiful Arifin Syam Surya arifin syam syam Az Zahra, Upi Fathimah Bagus Muliawan Bayu Iskandar Bohari - Bohari Bohari Bohari Bohari Bohari Yusuf Bohari Yusuf Buchari Buchari Buchari Buchari Budiono, May Cahaya, Tentriati Chairul Saleh Darmin - Darwin, Chepy Dirgarini Julia Nurlianta Subagyono Eka Apriska S Kusuma Erwin - Erwin Erwin Erwin Erwin Erwin Erwin Erwin Erwin Erzha, Nutfahryza Fadilah Ramadhani Farida Kristiana Farlianti, Resma Lita Fatimah Islamunisa Filus, Tio Fitriana, Mila Friscylia Friscylia Gaanty Pragas Maniam, Gaanty Pragas Hariati, Hariati Hariati, Hariati Harum Widyastuti Hening Ayu Marinda Hutagalung, Sandi Christopher Idris Mandang, Idris Irviansyah, Alfian Iskandar, Bayu Joni Rahman Josephine Josephine, Josephine Juntia Kirana Pratiwi Khasanah, Manja’a Kumalasari, Anisa Kurniasih, Ririn Feby Kusmiaty, Prilianda Leonardus Lewo Hayon Lianasari, Ika Yekti Lossi Hotmaida Simanjuntak Lumban Gaol Veronica Destiana M. Bachri Amran Manja’a Khasanah Margaretta D. R. N. S Marvin Horale Pasaribu May Budiono Mayang, Julia Agustin Menono, Fera Friskaneke Mila Fitriana Muhammad Asfian Nur Muhammad Bachri Amran Muhammad Rizky Muhammad Robiansyah Nanang Tri Widodo Nanang Tri Widodo Nauval Dwi Fadillah Nazaratun Thaiyibah Noor Hindryawati Noor Hindryawati, Noor Nur, Nana Septiana Nurhasanah Nurhasanah Oktavia, Dwina Putri Oktaviani, Reka pakasi, Resy Prayuda, Adif Putri, Amelia Putri, Rinda Anisyah RAHMAT GUNAWAN Rahmat Gunawan Rani Novia Ulya Rida Awliyani Rientha Septiana Rika anggraini Rina Rina Ristia Asri Fidayana Rita Hairani Rudi Kartika, Rudi Rumengan, Nur Khamillah Sadijah Achmad Saepudin Suwarsa Saibun Sitorus Saibun Sitorus Sandi Christopher Hutagalung Sari, Ermalia Lintang Sari, Ika Yekti Liana Sari, Rahma Juwita Septiana, Rientha Shintia Alifah R Soerja Koesnarpadi Soerja Koesnarpadi Subagyono, Dirgarini Julia Nurlianti Subur P Pasaribu Teguh Wirawan Teguh Wirawan, Teguh Tika Widyastuti Tio Filus Trisnawati, Ani Victoria, Stefanie Willem Hendrik G Wirdhaningsih Wirdhaningsih Yasser Arafat Yulianti Kartika Yulieta, Afifah Nur Yusuf, Irfan Maulana