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Al-Kimia
Published by Universitas Islam Negeri Alauddin Makassar
ISSN : 23022736     EISSN : -     DOI : -
Core Subject : Science,
Chemistry
Al-Kimia is a journal of chemistry that published by Department of Chemistry, Faculty of Science and Technology UIN Alauddin Makassar. The journal is published twice a year on January-June and July-December. This journal encompasses original research articles in all aspects of chemistry and related area. The journal, which was firstly published in July 2013, is a forum for communication of research results, review the results of research, methodologies and new approaches in research related to chemistry in Indonesia.
Arjuna Subject : -
Articles 238 Documents
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Synthesis Of L-Menthyl Acetic by Esterification L-Menthol and Acetic Anhydride with Variation Of Time Novia Suryani; A Ghanaim Fasya; Rurini Retnowati; Akyunul Jannah
Al-Kimia Vol 8 No 1 (2020): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (693.862 KB) | DOI: 10.24252/al-kimia.v8i1.11965

Abstract

l-menthyl acetic is an ester with specific aroma that synthesized by reaction of l-menthol and acetic anhydride and useful in fragrance industry. This paper reports influenced variation of time reaction toward ester product and characteristics l- menthyl acetic based on TLC, FTIR, GC and GC-MS. Reaction using l-menthol, acetic anhydride and catalyst H­2­SO­4­ 98 % in diethyl eter solvent at temperature 60 °C with variation of time reaction (45, 60, 75, 90, 105 minutes). The result of research is variation of time influence product with highest yield 88,43 % for 90 minutes. Monitoring TLC achived R­f­ = 0,82; analysis by FTIR achived specific wave number ester 1736,96 cm-1; analysis by GC achived t­r­ = 14,82 minutes and analysis by GC-MS achived t­r­ = 16,13 minutes with base peak m/z = 95.
Uji Aktivitas dari Ekstrak Etanol Daun Bilajang Bulu (Merremia vitifolia) terhadap Bakteri Staphylococcus Aureus Ella Hasanah; Ni Komang Ayu; dela puspita; sukarti sukarti
Al-Kimia Vol 8 No 1 (2020): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v8i1.10079

Abstract

Penelitian ini bertujuan untuk mengetahui aktivitas ekstrak etanol daun Bilajang Bulu (Merremia vitifolia) terhadap bakteri Staphylococcus aureus. Dewasa ini, salah satu tumbuhan yang di manfaatkan sebagai obat oleh masyarakat terutama masyarakat di Kabupaten Luwu Provinsi Sulawesi Selatan, yaitu tumbuhan Bilajang Bulu. Air dari perasan Daun Bilajang dipercaya oleh masyarakat sekitar dapat mengurangi kadar gula darah dan daunnya dimanfaatkan sebagai obat untuk mempercepat penyembuhan jika terjadi luka pada penderita diabetes. Hal ini dikarenakan tumbuhan Merremia vitifolia meliliki senyawa aktif berupa flavonoid yang merupakan senyawa aktif yang berfungsi sebagai antivirus, insektisida dan antibakterisida. Metode pada penelitian ini melalui preparasi sampel daun Merremia vitifolia yang dikeringkan dengan diangin-anginkan, ekstraksi sampel dengan metode maserasi menggunakan etanol 96%, kemudian diuji aktivitasnya menggunakan bakteri staphylococcus aureus. Hasil penelitian diperoleh konsentrasi yang memberikan aktivitas paling optimal yaitu pada konsentrasi 20% dengan rata-rata zona bening 9,5 mm.
Aktivitas Antibakteri Turunan Kalkon Tersubstitusi Bromo Terhadap Bakteri Bacillus subtilis dan Escherichia coli Retno Aliyatul Fikroh; Sabirin Matsjeh; Chairil Anwar
Al-Kimia Vol 8 No 1 (2020): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v8i1.12024

Abstract

Pengembangan obat antibiotik dalam menanggulangi penyakit akibat infeksi bakteri semakin meluas. Hal ini diiringi dengan semakin meningkatnya prevalensi retensi terhadap antibiotik. Banyaknya kasus retensi terhadap antibiotik menyebabkan perlu dilakukan pengembangan agen antibakteri yang salah satunya berasal dari senyawa turunan kalkon. Sintesis senyawa turunan kalkon yang memiliki aktivitas dalam menghambat bakteri Bacillus subtilis dan Escerichia coli telah dilakukan. Sintesis senyawa (E)-2’-hidroksi-2-bromo-4,5-dimetoksikalkon melalui reaksi kondensasi Claisen-Schmidt dari senyawa 2-hidroksiasetofenon dengan 2-bromo-4,5-dimetoksibenzaldehida.. Sintesis dilakukan dengan metode refluks dalam kondisi basa menggunakan katalis NaOH dan metanol sebagai pelarut selama 24 jam. Struktur hasil sintesis senyawa turunan kalkon dianalisis dengan FTIR, KLT-scanner, GC-MS, MS-direct, 1H-NMR dan 13C-NMR. Uji antibakteri dilakukan dengan metode difusi cakram (sumuran) terhadap bakteri Bacillus subtilis dan Escherichia coli. Seri konsentrasi senyawa meliputi 1%, 5%, 10%, dan 20% serta digunakan kontrol positif 4-isopropil-3-metilfenol 1%. Hasil penelitian menunjukkan bahwa sintesis senyawa turunan kalkon menghasilkan padatan berwarna kuning dengan rendemen sebesar 78,45%. Daya hambat senyawa kalkon dan 4-isopropil-3-metilfenol sebagai kontrol positif hampir sama untuk kedua bakteri yaitu 15 mm untuk Bacillus substilis dan 13 mm untuk Escherichia coli. Selain itu, uji daya hambat senyawa turunan kalkon terhadap bakteri Bacillus substillis lebih baik dibandingkan pada bakteri Escherichia coli pada konsentrasi 20% dengan zona hambat berturut-turut sebesar 19,7 dan 17,7 nm.
The Carbon Effect in Biodiesel Synthesis Mohammad Arfi Setiawan; Brilian Gema Morentera
Al-Kimia Vol 8 No 1 (2020): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v8i1.6368

Abstract

Biodiesel is synthesized from the trans-esterification reaction of vegetable oil and alcohol using a catalyst such as acids, bases or enzymes. The acid catalyst that is often used is sulfuric acid; H2SO4, and HCl while most of base catalysts are NaOH and KOH. The aim of this study is to determine the effect of carbon derived from sugar heating in the synthesis of biodiesel with a sulfuric acid catalyst; H2SO4. Trans-esterification reaction of Jatropha oil and methanol with sulfuric acid catalyst was done with oil and methanol at 1:9 ratio. The results showed that (1) the physical properties of the biodiesel was synthesized with carbon-H2SO4 has a difference with physical properties the biodiesel was synthesized by sulfuric acid (2) carbon-H2SO4 was used in the trans-esterification reaction of Jatropha oil and methanol to produce methyl ester character is the density of 0.889 g / mL, 24.59 cSt viscosity and refractive index of 1.464, (3) methyl ester produced from the reaction of trans-esterification of Jatropha oil and methanol with sulfuric acid catalyst has a character that is a density of 0.882 g / mL, 11.70 cSt viscosity and refractive index of 1.458.
Isolasi dan Uji Aktivitas Antioksidan Metabolit Sekunder dari Ekstrak Etil Asetat Kulit Batang Kangkang Katup (Bauhinia semibifida Roxb) Haiyul Fadhli; Anita Lukman; Robiatun Adawiyah
Al-Kimia Vol 8 No 1 (2020): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v8i1.10152

Abstract

Antioxidant was a compound which possessed an activity as scavenger of free radicals. This study was aimed to examine the antioxidant activity of ethyl acetate fraction and isolated compound from stem barks of Bauhinia semibifida Roxb. Samples extracted by gradual maceration with n-hexane solvent, ethyl acetate and methanol respectively. Isolation was carried out using Vacuum Liquid Chromatrography and purification by column chromatography with Sephadex LH-20. Isolated compound (BS) obtained was ivory crystalline with melting point 163-1650C. The analysis of FT-IR spectra, UV spectra and the result of qualitative test by Liebermann Burchard reagent were is shown positive as a terpenoid. Antioxidant activity were evaluated by using DPPH method for ethyl acetate fraction and isolation compound in serial concentration of 1000; 500; 250; 125; 62,5; 31,25 ug/mL. The result found that ethyl acetate fraction (f4 and f11) of stem barks of Bauhinia semibifida showed antioxidant activity with IC50 value of >1000 ug/mL; 179 ug/mL. In conclusion, F11 from ethyl acetate extract from stem barks of Bauhinia semibifida Roxb. exhibited an activity as scavenger of free radicals from DPPH. Keywords: Antioxidant, Bauhinia semibifida Roxb, IC50, VLC 
Aplikasi Tepung Cacing Tanah (Lumbricus rubellus) Untuk Meningkatkan Kadar Omega-3 Dan Omega-6 Ikan Bandeng (Chanos chanos) Budidaya Tambak Ismail Marzuki; Irwan Paserangi; Muhammad Yusuf Ali
Al-Kimia Vol 8 No 2 (2020): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v8i2.13807

Abstract

The quality of milkfish (Chanos chanos) in ponds cultivation is low. Small body size, pale body surface, odor of mud and low nutritional value cause not compete in the retail market, due to ponds experiencing burnout due to excessive use of synthetic fertilizers and pesticides. The aim of this study was improved the quality of milkfish farming with earthworm flour (Lumbricus rubellus) (TCT). Adding TCT to feed with four different treatments for 30 days. The results showed that the administration of 5%, 10% and 15% TCT, could improve the quality of milkfish ponds, both qualitative and quantitative. Qualitative improvement aspects, namely the surface of the fish's body was brighter, scales cleaner and whiter, the smell of mud was not felt, while the achievement of quantitative aspects was the fish's weight increased sharply in the range of 1.465% - 1.846% per day and omega-3 levels increased in the range of 1.9834 % - 5,5693% and omega-6 increased in the range of 1.4993% - 4.8796% or an increased of nearly 10 times each compared to levels of omega-3 and omega-6 milkfish samples without TCT
Kapasitas Adsorpsi Biomassa Paku Air (Lemna minor linn) Teresterifikasi Oleh Asam Sitrat Terhadap Mangan(Ii) Anita Anita; Titin Anita Zaharah; Ajuk Sapar
Al-Kimia Vol 8 No 2 (2020): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v8i2.16144

Abstract

Research on the adsorption of Mn (II) ions has been carried out using  biomass duckweed (Lemna minor linn) with the esterified by citric acid. This study aims to determine the maximum adsorption capacity of Mn (II) ions in using adsorbent biomass of duckweed esterified by citric acid. Water nail biomass adsorbents were characterized using FTIR to determine the functional groups of citric acid esterified adsorbents. The stages of this research include modification of water biomass using citric acid, followed by manganese (II) ion adsorption tests with pH variations in pH, contact time of adsorption and initial concentration variations under optimum conditions. The results showed that optimum adsorption occurred at pH  5, contact time for 10 minutes and the concentration of Mn (II) solution 15 mg / L was measured using atomic absorption spectrophotometry. The equation used in the study follows the Langmuir and Freundlich equations. Based on the Langmuir isotherm equation, the maximum adsorption capacity of Mn (II) ion using citric acid modified water nail biomass is  7,645 mg/ g, the equilibrium constant is 4,317 L/ mol and the adsorption energy is 36,84039 KJ / mol.
Dekolorisasi Malachite Green oleh Reagen Fenton: Optimalisasi Parameter dan Studi Kinetika Said Ali Akbar
Al-Kimia Vol 8 No 2 (2020): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v8i2.13261

Abstract

The study of the decolorization of Malachite Green in solution using the Fenton reagent has been investigated. The effects of different reaction parameters such as hydrogen peroxide concentration, iron ion concentration, pH of the solution, and initial dye concentration have been carried out. In this study the experimental range for H2O2 concentrations varied from 0.2 mM to 4 mM and Fe2+ ions were 0.01-0.1 mM. All experiments were carried out at room temperature of 27 oC. Furthermore, the optimal oxidation condition with the concentration of MG dyes of 20 mg/L was with H2O2 0.5 mM, Fe2+ 0.05 mM, and pH at 3. The dye decolorization process of MG was also observed kinetically, it was found that the degradation process took place with first-order reaction rate. Under optimal conditions, the dye solution with a concentration of 20 mg/L completely decolorized within 60 minutes at 27ºC, and 76% of the Chemical Oxygen Demand (COD) was removed. This proves that MG was not only decolorized but also mineralized.
Aktivitas Antioksidan Kulit Pisang Muli (Musa acuminata linn) dan Kulit Pisang Kepok (Musa paradisiaca formatypica) Putri Ade Rahma Yulis; Yelfira Sari
Al-Kimia Vol 8 No 2 (2020): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v8i2.15543

Abstract

This study examined the content of banana peel. The research began with an extraction  process then continued with phytochemical tests.  Qualitatively result showed banana peel contain quite complex secondary metabolites including flavonoids, saponins, phenolics, tannins, steroids and triterpenoids for Muli banana peels and flavonoids, saponins, phenolics, tannins, and triterpenoids for Kepok banana peels. Qualitative tests were conducted to detect total phenolic and flavonoid content using Microplate Reader.  Flavonoids averaged 19.797 mg QE / g for  Muli banana peel and for Kepok banana peel 15, 529 mg QE / g. The measurement results of the total phenolic content  of Muli banana peel was 108.336 mg GAE / g and for Kepok banana 32, 496 mg GAE / g. Antioxidant activity for Muli banana peels has an IC50 value of 27, 56 µg / ml which means it belongs to a group with high antioxidant activity and Kepok banana 479.77 µg / ml which is classified as a low antioxidant activity but still within the range of potential values as antioxidant. From this research, it is known that both  of types banana peels have the potential as raw material for developing products with high antioxidant levels  Keywords: Banana peels, antioxidants, secondary metabolites
Perubahan Pola Kromatografi Lapis Tipis Ekstrak Daun dan Batang Teh (Camellia sinensis (L.) Kuntze) yang Menjadi Inang bagi 3 Benalu Berbeda Irmanida Batubara; Lydia Octifani; Jarwadi Budi Hernowo
Al-Kimia Vol 8 No 2 (2020): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v8i2.14764

Abstract

Plants produce primary and secondary metabolite compounds depending on their growth conditions. The tea plant (Camellia sinensis (L.) Kuntze that hosts Loranthus produces different metabolites compared to those not hosting. This study aims to determine the change in the thin layer chromatography pattern (TLC) of leaf and stem tea extract that is the host 3 types of Loranthus tea namely Loranthus atropurpureus, Loranthus cochinchinensis, and Loranthus pentandrus. Leaf and stem tea extracts that host 3 types of Loranthus were separated using TLC with stationary phase of silica gel 60 F254 and the mobile phase of DCM: MeOH: n-hex (48:1:1). Separation results was detected using UV lamps 254 and 366 nm. The changes of the band's area of each extract were determined using software ImageJ. The results showed a change in TLC patterns. The declining band's area was found in bands detected at 366 nm for the host's stem and tea leaves. The increasing band's areawere found on bands detected at 254 nm especially on tea leaves that host. In conclusion, the change in TLC pattern can be used to determine the compounds that change due to tea plants to host and can be alternative utilization.

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