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Al-Kimia

al-kimia
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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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Sintesis Metil Ester dari Minyak Biji Kemiri (Aleurites Molluccana) Menggunakan Metode Ultrasonokimia Rahmawati Aziz; Aisyah Aisyah; Asriani Ilyas
Al-Kimia Vol 4 No 1 (2016): June
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Using the fuel oil is the basic necessary in the world now. But, the raw material cannot be updated. To ensure the availability of the fuel oil so, the newest of alternative energy is explored it. One of the ways is biodiesel which made from vegetable oil. In this research is resulted from the transesterification reaction between candlenut oil and methanol by utilizing ultrasonic equipment. This research has passed some phases, they are the determining of acid number in oil then continued by creating biodiesel from ultrasonic wave 47 kHz. Identification of FTIR and GCMS are two methods which used to analyze the component compound in biodiesel product. The conversion number that be gotten from FAME with reaction of variation time 30, 40 and 50 in succession 0,037%, 0,029% and 0,018%. The result analysis of FTIR shows some of functional groups which are special from biodiesel. While the result of GCMS analysis is known that there are 5 component compounds in biodiesel namely ester methyl palmitic acid, ester methyl olead, stearata ester methyl, linoleic ester methyl and elaidic ester methyl.

Identifikasi Metabolit Sekunder Ekstrak Etil Asetat Biji Alpukat (Persea americana Mill.) dan Uji Toksisitas Terhadap Larva Udang Artemia salina Leach. Nurdia Asdar; Asriani Ilyas; Maswati Baharuddin
Al-Kimia Vol 2 No 2 (2014): Desember
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Identification of metabolite compound in acetone Extract from Fruits Avocado seed (Percea americana Mill) and toxicity test against Artemia salina Leach. Aim of this research is to identify the secondary metabolite compound in aceton extract from fruits Avocado seed (Percea americana Mill) and to determine the potential of secondary metabolites from an avocado extract as anticancer. The compound was obtained from Identification process in several stages, namely extraction, fractination, purification and identification. The identification process was color test, TLC, spectroscopy IR. The toxicity test by Brine Shrimp Lethality Test (BSLT) to Artemia salina Leach. The compound obtained from this research was yellow-white crystalline needle-shaped, the purity test with TLC analysis showed a stain in three eluen system on the stain test on three eluent systems with Rf proportions as follows; 0,15 from chloroform:ethyl acetat (6:4), 0,33 from methanol:chloroform (1:9), 0,75 for acetone:ethyl acetat, and positively to the reagent Wagner and gave brown precipitate for indicate as alcaloid group. This result is supported by spectroscopy from compound.While toxicity tests showed condensed acetone extracts and pure compounds are toxic with LC50 value of each is 20.61 mg/mL and 39,81 mg/mL.

Optimalisasi Kalsium Karbonat Dari Cangkang Telur Untuk Produksi Pasta Komposit Warsy Warsy; St Chadijah; Wa Ode Rustiah
Al-Kimia Vol 4 No 2 (2016): December
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Egg shell is a household waste which can be used to produce a composite paste, as it contains around 90% calsium carbonate (CaCO3) as the main composition. This research aims to determine the optimum weight of egg shell powder in composite paste production. This research is conducted by determining the calsium carbonate content beforehand by EDTA titration and the determination of the contain of calsium by using atomic absorption spectroscopy (AAS), then the determination of the optimum weight of shell powder by varying the shell powder and baking soda. The results of the research that has been done that the content of calsium carbonate in the shell of eggs was 92,57% and calsium at 28%. While the optimum weight for the shell powder manufacture composite paste which is 3 grams with a ratio of 3,0 (Ca) : 7,0 (BS), in which the pH obtained is 9. This is in a accordance by SNI that the pH value of the composite paste is 4,5–10,5 and is semisolid form.

Sintesis N-p-Metilbenzil-p-Kumaramida dari Asam p-Kumarat Nasriadi Dali; Arniah Dali
Al-Kimia Vol 5 No 2 (2017): 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.v5i2.3643

N-p-Methylbenzyl-p-coumaramide has been synthesized from p-coumaric acid. The purpose of this study was to synthesize N-p-methylbenzyl-p-coumaramide compounds from p-coumaric acid. The N-p-methylbenzyl-p-coumaramide target compound was obtained by direct conversion method using a orthoboric acid catalyst. Target compounds were identified and characterized by melting point, TLC test, FTIR, 1H-NMR, and 13C-NMR spectrometer. The results showed that N-p-methylbenzyl-p-coumaramide compound obtained was white solid (yield 75.83%) with melting point 156-158 oC and TLC (SiO2, n-hexane : chloroform = 5: 3 v/v, Rf = 0.37).

Kinetika Hidrolisis Pati Biji Nangka (Artocarpus heterophyllus) Menggunakan Katalisator Asam Klorida (HCl) Sri Endang; Muh. Yudi; Asri Saleh
Al-Kimia Vol 2 No 1 (2014): June
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

The research of kinetic hydrolysis from the starch of jackfruit seed (Artocarpus heterophyllus) used clorid acid catalyst (HCl) aims to know the influence of variation of concentration HCl catalyst which give the maximum result of hydrolysis of the starch of jackfruit seed, determining the optimum concentration of HCl catalyst that produces the maximum value of the reaction rate constants, and determine the value of the reaction rate constant of hydrolysis the starch of jackfruit seed using catalyst. The method of this research has done in two stages that are the determination of the optimum catalyst concentration of HCl hydrolysis reaction of the starch of jackfruit seed using various concentration of catalyst HCl 0,5 M; 1,0 M; 1,5 M; 2,0 M and 2,5 M at the optimum temperature and stirring time (90oC during 70 minutes). Hydrolysis followed by neutralization process using sodium hydroxide solution and evaporated to get the form of glucose concentrated, that glucose is analyzed by qualitative and quantitative with Benedict experiment and fenol sulphate acid method, based on maximum degree of glucose which is gotten from the result of hydrolysis the starch of jackfruit seed variation concentration oh HCl is in HCl 1,5 M concentration with degree of glucose (% weight) is 7,54% with percentage of starch conversion is 83,21%. Second step is determining the value of hydrolysis constant rate reaction which use time variation (30, 40,50, 60 and 70) minutes in 70 minutes optimum operation condition, 90oC te mperature and concentration catalyst of HCl 1,5 M. Based on statistic calculation date of ANOVA is gained F hitung < F tabel so Ho receive and reject HI which shows that there is not influence catalyst variation concentration of HCl to the result of hydrolysis the starch of jackfruit seed which is gained. The result of the research shows that hydrolysis of kinetic of the starch of jackfruit seeduse HCl catalyst is reaction of the first apparent orde with value of the reaction constant rate k = 0,0216 minutes-1.

Pengaruh pH dan Waktu Terhadap Kemampuan Adsorpsi Mip_TFMAA-co-Egdma St. Fauziah; Nunuk Hariani Soekamto; Muh. Bachri Amran; Paulina Taba
Al-Kimia Vol 3 No 2 (2015): December
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

A molecularly imprinted polymers (MIP) can be synthesized using functional monomers and template molecules through polymerization with the aid of cross linker. In previous studies, MIP_TFMAA-co-EGDMA was synthesized using the main ingredient tryfluoromethylacrylic acid (TFMAA) as functional monomer, b-sitosterol as a template molecule and ethyleneglycol dimethacrylate (EGDMA) as cross linker. The ability of adsorption against the effects of pH and contact Time of MIP has been evaluated. Variations of pH standard solution b-sitosterol were 4, 5, 6, and 7, while the time variation used were 30, 60, 90, and 120 minutes. The data of b- sitosterol concentrations adsorbed by MIP_TFMAA-co-EGDMA because of the influence of pH and contact times were analyzed using high pressure liquid chromatography (HPLC). pH5 gives the most influence on the adsorption capacity MIP_TFMAA-co-EGDMA against b-sitosterol. The number of b-sitosterol adsorbed on the pH was 1.0265 mg/g, while at 90 minutes was the best time for the MIP b- sitosterol adsorb as much as 1.3486 mg/g. Based on the adsorption kinetics study, the adsorption ability MIP_TFMAA-co-EGDMA against b-sitosterol in accordance with the pseudo second order kinetic model.

Optimalisasi Biosorpsi Bekatul Terhadap Kalsium (Ca) dengan Menggunakan Metode Batch Subarman Subarman; Asri Saleh; Aisyah Aisyah
Al-Kimia Vol 1 No 1 (2013): June
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

The study is titled Optimization of biosorption Biomass Against Calcium (Ca) by using the method of Batch. Background on this research that, the utilization of biomass as an adsorbent bran on the absorption of calcium metal (Ca) and reduce the pollution caused from the bran biomass. This study aims to determine the optimum pH and time as well as processing of biomass with metal biosorption Calcium (Ca). Bran biomass taken directly to rice mills in Kecematan Pallangga Gowa. The method used in this study is the activation process, the determination of the optimum pH, optimum timing, method in the determination of biosorption Batch, then the results were analyzed by using Atomic absorption spectrophotometer (AAS).The results obtained from this study is that the pH optimum at pH 9, the optimum contact time to 15 minutes, and the biosorption capacity of 14.1804 mg/L.

Analisis Proksimat pada Beras Ketan Varietas Putih (Oryza sativa glutinosa) Suriani Suriani
Al-Kimia Vol 3 No 1 (2015): June
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

It has done research on Proximate Analysis On White Glutinous Rice Varieties (Oryza sativa glutinosa) Origin Sinjai Regency with the aim to determine the content prosimat include moisture content, ash content, crude proteincontent, fat content, crude fiber content and total carbohydrate content contained on white glutinous rice varieties (Oryza sativa glutinosa) origin Sinjai regency. This type of research is experimental research is a research laboratory that uses a simple experiment. At the proximate analysis includes determination of moisture content (%), protein content (%), fat content, ash content (%), crude fiber levels, total carbohydrate(%). The results showed that the water content ranges for % 16.24%, for protein content ranged from 6.81%, forfat content ranged from 0.19 % to 0.24% ash content ranges, for fiber content ranged from 0.28% and for carbohydrate content ranged from 76.24 %.

Sintesis Zeolit dari Abu Layang dengan Metode Hidrotermal dan Uji Adsorptivitas Terhadap Logam Timbal (Pb) Rismang Rismang; Syamsidar HS Syamsidar HS; Kurnia Ramadani
Al-Kimia Vol 5 No 2 (2017): 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.v5i2.3394

Synthesis of zeolite from fly ash obtained from Jeneponto Bosowa energypower plant have been conducted by hydrothermal method. This study was conducted to determine the characteristics of a synthetic zeolite fly ash and synthetic zeolite adsortivitas to metallic lead (Pb). Fly ash which is the main source of silica prepared by the process of concentration variations reflux with HCl (2M; 3M; 4M and 5M). Manufacture of sodium silicate solution by dissolving NaOH fly ash into the proportion of 10 ml per 1 gram of fly ash. Synthesis process by adding sodium aluminate into a solution of sodium silicate with a ratio of 1: 1 and then put in an autoclave as a hydrothermal process at a temperature of 120 ° C for 2 hours. Hydrothermal product obtained is characterized by X-Ray Diffraction (XRD) to determine the type and intensity of the zeolite crystals obtained from the synthesis process. XRD analysis results showed the highest intensities are in the process of reflux 5M with type zeolite obtained in the form of zeolite ITQ-34, zeolite (K, Ba) -G, L, sodalite and alumina-silica minerals such as eucryptit and aluminum oxide. The resulting zeolite able to absorb the metals Pb2+ at 99.04%, which is made with a concentration of 20 ppm of 50 mL with a mass of 1 gram of zeolite.

Analisis Antioksidan Ekstrak Etil Asetat Dari Kulit Buah Rambutan (Nephelium Lappaceum) dengan Menggunakan Metode dpph (1,1 difenil-2-pikrilhidrakzil) Nurfadillah Nurfadillah; St Chadijah; Waode Rustiah
Al-Kimia Vol 4 No 1 (2016): June
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Rapiah rambutan fruit leather (Nephelium lappaceum) is one of the traditional medicine to cure various diseases such as fever and dysentery. Scientific research previously stated rambutan fruit peel skin Rapiah rambutan (Nephelium lappaceum) potentially have antioxidant content. Through this research can know the effect of solvent ethyl acetate to extract optimal rambutan fruit skin in antioxidants withdrawal. The method used for extraction is macerated using methanol and partitioned with liquid-liquid extraction using ethyl acetate solvent with a ratio (1:3), (1:4) and (1:5) which produces a thick rind extract rambutan. The extract was tested color and separated by thin layer chromatography (TLC) using the eluent butanol: glacial acetic acid: water (BAA) (4: 1: 5). Antioxidants are determined by testing against DPPH free radicals by measuring the absorbance of DPPH (1,1-diphenyl-2-pikrilhidraksil) at a wavelength of 517 nm. So that the results of this study showed the highest % reduction obtained at a ratio (1:3).

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