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NOOR HUBDRYAWATI
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jurnalkimiaunmul@gmail.com
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Jl.Barong Tongkok no.04 Kampus Gn.kelua Samarinda Kalimantan Timur
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INDONESIA
Jurnal Kimia Mulawarman
Published by Universitas Mulawarman
ISSN : 16935616     EISSN : 24769258     DOI : DOI: https://doi.org/10.30872/jkm
Core Subject : Science,
Chemistry
Journal of Kimia Mulawarman is a peer-reviewed, open access journal that publishes original research articles, review articles, as well as short communication in all areas of chemistry, including educational chemistry and applied chemistry.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 224 Documents
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IDENTIFIKASI DEKSAMETASON PADA JAMU PENGGEMUK BADAN YANG DIJUAL DI E-MARKETPLACE SHOPEE MENGGUNAKAN KROMATOGRAFI LAPIS TIPIS Sri Widia Ningsih; Lerny Serena Sirait; Dewi Setiyawati
JURNAL KIMIA MULAWARMAN Vol 19 No 1 (2021)
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.v19i1.1069

Abstract

The regulation of Indonesian Health Ministry number 007 of 2012 about traditional medicines registration explained that traditional medicines are prohibited from containing Drug Chemicals (DC). The aim of the study was to identify the DC of dexamethasone in Agency Fattening Herbs sold in Shopee e-marketplace. Dexamethasone is a corticosteroid drug used as an anti-inflammatory agent. Long-term use can cause a hormonal effect, iatrogenic chusing syndrome. This study was a qualitative descriptive using thin layer chromatography (TLC). The mobile phase used to identify dexamethasone in this study was Ethyl acetate: Toluen: Methanol (45 : 54: 1) and the solvent used was Chloroform: Methanol (9 : 1). Many of the samples tested were 3, namely X, Y and Z. The results of TLC formed purple stain spots on all three samples that were parallel to the comparison on 254 nm UV light. The price of dexamethasone comparison Rf is 0.53. The Rf value of the sample X was 0.34. The Rf value of sample Z is 0.53. The calculation results of Rf value were analyzed by SPSS with a significant value (p ≤ 0.001). The analysis was continued by the Duncan test to show groups that had differences. Of the three samples Agency Fattening Herbs tested two of them (X and Z) containing Dexamethasone whereas one (Y) does not has Dexamethasone. Keywords: Agency fattening herbs, dexamethasone, e-marketplace, thin layer chromatography
VALIDASI METODE PENENTUAN Cd (II) DALAM PUPUK NPK SECARA SPEKTROFOTOMETRI SERAPAN ATOM NYALA DI LABORATORIUM UJI KUALITAS, PT. PUPUK KALIMANTAN TIMUR Leonardus Lewo Hayon; Alimuddin Alimuddin; Aman Sentosa Panggabean
JURNAL KIMIA MULAWARMAN Vol 19 No 1 (2021)
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.v19i1.898

Abstract

The research about validation method of determination of Cd (II) in NPK fertilizer by Flame Atomic Absorption Spectrophotometry at the Quality Control Laboratory, PT. Pupuk Kaltim has been done. Determination of Cd (II) was done by referring to the Indonesian National Standard (SNI) 2803:2012. Based on the research results obtained by the correlation coefficient (r) was 0.9991; reproducibility with a relative standard deviation (RSD) value was 4.502 % less than 2/3 CV Horwitz was 9.757 and repeatability with a relative standard deviation (RSD) value was 5.225% less than 2/3 CV Horwitz was 9.695; % recovery was in the range of 80-110 % with an average was 98.56 %; limit of detection was 0.056 mg/kg and limit of quantitation was 0,066 mg/kg; uncertainty estimation of measurement with uncertainty components of concentration, volume, mass, precision and purity of the standard solution, obtained the expanded uncertainty value with a 95 % confidence level was ± 0.197 mg/kg and uncertainty percentage value was 10.43 %.
STUDI KOMPUTASI INTERAKSI ZEOLIT LTA (LINDE TYPE A) DENGAN KATION ALKALI (LI+, NA+, K+) MENGGUNAKAN METODE MEKANIKA MOLEKULER Audi Zahid Iswaradi; Rahmat Gunawan; Noor Hindryawati
JURNAL KIMIA MULAWARMAN Vol 19 No 1 (2021)
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.v19i1.1012

Abstract

A study of computation on zeolite LTA (Linde Type A) interaction with alkaline cation (Li+, Na+, K+) using the mechanical molecular method was conducted. Data processing was conducted computationally using Hyperchem 7.0 with the mechanical molecular method. The result of the study showed zeolite LTA with ratio Si/Al 2,4286 has the lowest minimum energy. Furthermore, impregnation by cation Li+ increases structure stability, and impregnation by cation Na+ has the largest diameter window on Zeolite LTA.
PERBANDINGAN KINERJA ANALITIK HASIL PENENTUAN ION LOGAM Pb DENGAN MENGGUNAKAN SPEKTROFOTOMETER SERAPAN ATOM DI BERBAGAI LABORATORIUM SAMARINDA Arifin Syam Surya; Bohari Yusuf; Aman Sentosa Panggabean
JURNAL KIMIA MULAWARMAN Vol 19 No 1 (2021)
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.v19i1.909

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).
STUDI SUHU TRANSISI GELAS PRODUK PENCANGKOKAN ANHIDRIDA MALEAT PADA KARET ALAM SIKLIS: METODE DIFFERENTIAL SCANNING CALORIMETRY Muhammad Said siregar; Enisa Cita Mentari; Desi Ardilla; Masura M D; Asmarasari Nasution; Eddiyanto Eddiyanto
JURNAL KIMIA MULAWARMAN Vol 19 No 1 (2021)
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.v19i1.1076

Abstract

Pada penelitian ini dilaporkan perubahan suhu transisi gelas produk pencangkokan anhidrida maleat pada karet alam siklis. Pencangkokan anhidrida maleat pada karet alam siklis dilakukan dalam fase leleh dengan penambahan komonomer divinil benzen di dalam pencampur internal suhu 185oC dan kecepatan rotor 85 rpm. Konsentrasi anhidrida maleat yang digunakan dalam proses pencangkokan adalah 16 phr, tanpa penambahan dan dengan penambahan komonomer divinil benzen dengan variasi: 0,5, 1 dan 2 mol rasio. Produk pencangkokan dikarakterisasi dengan Differential Scanning Calorimetry untuk mempelajari perubahan suhu transisi gelasnya. Berdasarkan analisis dan pengolahan data menggunakan software thermal analysis diperoleh bahwa semakin banyak penambahan komonomer divinil benzene maka suhu transisi gelasnya semakin tinggi, yaitu: 69,46oC, 69,51oC, 70,08oC dan 70,56oC.
SABUN CAIR EKONOMIS DENGAN PEMANFAATAN LIMBAH MINYAK JELANTAH Indica Septriyanti; Aisyah Meisya Putri; Herman Herman; Yelfira Sari
JURNAL KIMIA MULAWARMAN Vol 19 No 1 (2021)
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.v19i1.927

Abstract

Reducing Environmental pollution from household products that are used continuously, Processing waste cooking oil waste can be used to make innovations that benefit the community. Cooking oil that is used in excess of its use is called used cooking oil which is not well consumed by the body and has a negative impact on soil and air pollution. Processing of used cooking oil can be made as soap, one of which is liquid soap. Liquid soap is cleaner and more effective soap in packaging and usage.
Uji Aktivitas Penghambatan Enzim α-Amilase dan Glukoamilase dari Ekstrak Etanol Daun Kirinyuh (Chromolaena odorata L.) Nelson Gaspersz; Eirene Grace Fransina; Anancy Reza Ngarbingan
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.v19i2.1120

Abstract

Research has been carried out to test the inhibitory activity of α-amylase and glucoamylase enzymes in the ethanolic extract of kirinyuh (Chromolaena odorata L.) leaves. The use of kirinyuh leaf ethanol extract as a diabetes drug in vivo has been carried out, but its mechanism of action have never been researched before, so further research is needed on the specific mechanism of ethanolic extract of kirinyuh leaves in reducing blood sugar levels, especially through inhibition of α-amylase and glucoamylase enzymes in vitro. The purpose of this study was to test the antidiabetic activity of the ethanol extract of kirinyuh leaves in vitro using α-amylase and glucoamylase inhibition methods. This research uses DNS spectrophotometric method. The results showed that kirinyuh leaf ethanol extract proved to have inhibitory activity against α-amylase and glucoamylase enzymes with IC50 values of 3730.15 ± 28.91 ppm or 3730.15 ± 28.91 µg/mL and 2510.78. ± 383.37 ppm or 2510.78 ± 383.37 µg/mL. From the results, it can be concluded that the ethanolic extract of kirinyuh leaves has inhibitory activity against α-amylase and glucoamylase enzymes. Telah dilakukan penelitian uji aktivitas penghambatan enzim α-amilase dan glukoamilase ekstrak etanol daun kirinyuh (Chromolaena odorata L.). Penggunaan ekstrak etanol daun kirinyuh sebagai obat diabetes secara in vivo telah dilakukan,tetapi belum diketahui mekanisme kerjanya, sehingga perlu dilakukan penelitian lebih lanjut mengenai mekanisme spesifik ekstrak etanol daun kirinyuh pada penurunana kadar gula darah terutama melalui aktivitas penghambatan terhadap enzim α-amilase dan glukoamilase secara in-vitro. Tujuan penelitian ini untuk untuk menguji aktivitas antidiabetes ekstrak etanol daun kirinyuh secara in vitro menggunakan metode penghambatan enzim α-amilase dan glukoamilase. Penelitian ini menggunakan metode DNS secara spektrofotometri. Hasil penelitian menunjukkan ekstral etanol daun kirinyuh terbukti memiliki aktivitas penghambatan terhadap enzim α-amilase dan glukoamilase dengan nilai IC50 masing-masing, yaitu sebesar 3730,15 ± 28,91 ppm atau 3730,15 ± 28,91 μg/mL dan 2510,78 ± 383,37 ppm atau 2510,78 ± 383,37 μg/mL. Dari hasil dapat disimpulkan bahwa ekstrak etanol daun kirinyuh memiliki aktivitas penghambatan terhadap enzim α-amilase dan glukoamilase.
Molecular Structure And Electronic Properties Of Eugenol And Its Analogues Using Dft Mirella Fonda Maahury; Muhammad Abdulkadir Martoprawiro; Veliyana Londong Allo
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.v19i2.1123

Abstract

Eugenol is the active molecule naturally found in clove oil. The calculations have been done for the eugenol and its derivatives computationally. This computational calculation aims to obtain a stable structure and electronic properties of eugenol, methyl eugenol, and acetyl eugenol. The computational calculation used DFT for geometry optimization in the gas phase using B3LYP functional and 6-31G(d) as the basis set. The optimized structure of eugenol and its derivatives is not planar. The presence of methoxy replacing hydroxy increases the bond length and decreases the bond angle and the dihedral. The electronic properties such as atomic charge and density of HOMO-LUMO show the difference between the three molecules.
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.
Pemanfaatan Berbagai Macam Limbah Menjadi Bioetanol Sebagai Bahan Bakar Alternatif Dwi Novelia; Arief Yandra Putra; Yelfira Sari
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.v20i1.1130

Abstract

Bioetanol merupakan etanol atau senyawa alkohol yang diperoleh melalui proses fermentasi biomassa dengan bantuan mikroorganisme yang bisa digunakan sebagai bahan bakar alternatif, minyak bumi dan energi lain yang berasal dari fosil. Sumber energi tersebut semakin menipis jika tidak ditemukan energi cadangan/alternatif. Untuk mengantisipasi sumber energi nasional yang semakin menipis, maka diperlukan energi terbarukan. Beberapa peneliti menemukan bahwa banyak limbah yang digunakan sebagai bahan bakar alternatif. Salah satu untuk menghasilkan bioetanol yang berkualitas sebagai pengganti energi alternatif adalah memiliki kadar bioetanol yang sesuai dengan Standar Nasional Indonesia serta syarat kualitasnya. Tujuan dari literature review ini adalah untuk mengetahui nilai kadar bioetanol dari setiap jenis limbah dengan berbagai macam tahapan yang digunakan. Metode yang digunakan dalam karya tulis ilmiah ini adalah penelusuran pustaka melalui database Google, Google Scholar serta Science Direct dengan menggunakan keyword. Jurnal yang telah ditemukan dilakukan screening dengan kriteria inklusi dan eksklusi. Berdasarkan hasil dari berbagai penelusuran yang dicantumkan dalam artikel ini didapatkan bahwa kadar bioetanol yang terbaik yaitu pada produksi bioetanol dari limbah tepung tapioka melalui penambahan starter dan lama fermentasi. Kadar bioetanol yang dihasilkan sebesar 92% dengan lama fermentasi 7 hari. Bioetanol ini diperoleh melalui proses Sakarifikasi, hidrolisis, Fermentasi, serta distilasi. Setelah melewati hari ke-7 fermentasi.

Page 18 of 23 | Total Record : 224

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