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Alchemy : Journal of Chemistry
Published by Universitas Islam Negeri Maulana Malik Ibrahim Malang
ISSN : 20861710     EISSN : 24606871     DOI : http://dx.doi.org/10.18860/al
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology
ALCHEMY: Journal of Chemistry (eISSN 2460-6871) is a scientific journal that focus on chemistry. This journal publishes a scientific article that cover research and review articles. Research topics for this journal such as natural science, physical chemistry, inorganic chemistry, organic chemistry, environment, biochemistry, marine, energy and other related-sciences. ALCHEMY: Journal of Chemistry also accepts article about halal products and chemistry on Islamic perspectives.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 14 Documents
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Search results for , issue "ALCHEMY (Vol.4, No.1" : 14 Documents clear
Bioethanol Dehydration Process using NaOH-Activated Zeolite at Various Concentration and Zeolite Weight Saidi, David; Jannah, Akyunul; Maunatin, Anik
ALCHEMY ALCHEMY (Vol.4, No.1
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (318.038 KB) | DOI: 10.18860/al.v4i1.3140

Abstract

Utilization of molasses as basic material for producing bioethanol becomes one of the promising efforts to fulfill the demand of fuel and diminish the dependence upon fossil fuel that its availability is increasingly rare. However, ethanol produced from fermentation of molasses has low purity. The purity could be increased by using dehydration method and zeolite activated by NaOH and alum as alumina source. The research is aimed to know the dehydration process of bioethanol use NaOH-activated zeolite at various concentration and zeolite weight on the purification of bioethanol. In this research, the experiments could be categorized into 4 groups, they are activation of zeolite, fermentation, distillation, and dehydration process. Activation of natural zeolite performed by entering of sized 120-150 mesh zeolite powder was added to glass beaker that contains  NaOH aqueous solution and followed by adding alum which took place at 80 ˚C for 8 hours and the final product calcinated at 600 ˚ C for 2 hour. Fermentation process was managed for 6 days and pH 5. Furthermore, bioethanol was separated by distillation method at 78,5 - 85 ˚C and followed by molecular sieve dehydration using zeolite activated by NaOH solution in variation of zeolite weight (30, 40 and 50 %) and NaOH concentration (1, 2, 3 dan 4 M). The amount of bioethanol was measured by gas chromatography method. Bioethanol concentration as fermentation product is 29,8 %. The result revealed that dehydration with 30% w.t zeolite activated by 2 M NaOH solution had the best activity in bioethanol purification with amount of bioethanol is 53,76 %, Increased Levels of Bioethanol (ILB) value is 80,39 % and Adsorption Capacity of Zeolite (ACZ) is 399,31 %.Keywords: bioethanol, concentration of NaOH, dehydration, molasses, molecular sieve, weight of zeolite
Potensi Ekstrak Kasar Teh Hitam (Camellia sinensis O.K. var. Assamica) sebagai Pewarna (Dye) pada Pembuatan Sela Surya Tersensitisasi (SSPT) Deskawi, Oki; Ningsih, Rachmawati; Avisena, Novi; Hastuti, Erna
ALCHEMY ALCHEMY (Vol.4, No.1
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (463.25 KB) | DOI: 10.18860/al.v4i1.3148

Abstract

Has done research on the manufacture of dye sensitized solar cells by utilizing the crude extract of black tea (Camellia sinensis var O.K. Assamica). This study aims to determine the potential of black tea extract as a dye in dye sensitized solar cell manufacturing. This study includes several stages: sample preparation of black tea, black tea sample extraction in a mixture of acetic acid: methanol: distilled water (4:25:21), analysis of the crude extract of black tea using UV-Vis, color density analysis using a color reader, testing DSSC obtained by measuring voltages and currents strong produced under conditions halogen lamp illuminated with a light intensity of 4.488 Watt/m2, the identification number of the crude extract of pigments by TLC analytical. The results of the characterization black tea extract is flavonoids. That it contains theaflavins shown with a maximum wavelength 273 nm. Color of black tea using a color reader testing showed reddish yellow (orange) with the color density reached 78,3%. Voltage maximum and maximum current strength produced by 107,3 mV and 2.13 x 10 -3 mA. The efficiency of the resulting solar cell system by 1,26 x 10 -2%. The results of the identification of the amount of pigment produced 8 spot with eluent ethyl acetate: formic acid: distilled water. Keywords: Dye sensitized solar cells, dye (dye), theaflavin
ALCHEMY Journal of Chemistry Alchemy, Alchemy
ALCHEMY: Journal of Chemistry ALCHEMY (Vol.4, No.1
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v4i1.3176

Abstract

Utilization of NaCl Solution of Moringa Oleifera Seed Extract as Natural Coagulant at Liquid Waste at PT. Cheil Jedang Indonesia – Jombang Rizqi, Wadziatir; Yulianti, Eny; Jannah, Akyunul
ALCHEMY ALCHEMY (Vol.4, No.1
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (350.004 KB) | DOI: 10.18860/al.v4i1.3141

Abstract

In this study, the coagulant from Moringa seeds extracted using NaCl solution. Early stages, Moringa seed powder was extracted using 1M NaCl solution. Variations in sample pH (pH 4, 5, 6, 7, 8, 9 and 10) and variations in coagulant dose (10, 20, 30, 40, 50, 60, 70 and 80 mL / L) was conducted to determine the effectiveness of each coagulant at pH test parameters, Total Suspended Solids and Chemical Oxygen Demand-Permanganate method. Characterization of Moringa seed extract solutions include levels of carbohydrates, proteins, fats and amino acids. Characterization results, the carbohydrate content of Moringa seeds extracted with NaCl solution at 909 ppm, the protein 3348 ppm, fat content 800 ppm and it contains 14 kinds of amino acids. Concentration of most amino acids are lysine, which is 0.196%. Coagulant of Moringa seed extract solution of NaCl with an optimum pH of 10 can decreased levels of TSS by 82.3% at a dose of 80 mL / L. Coagulant solution of NaCl extract of Moringa seeds can not reduce levels of COD-Mn.Keywords: Chemical Oxygen Demand-Permanganate, Coagulant, Moringa oleifera, Total Suspended Solids
Synthesis of 3-(4-Hydroxy-3-Metoxyphenyil)-1-Phenyl-2-Propen-1-On and its Antioxidant Activity Assay using DPPH Azizah, Yuzkiya; Hanapi, Ahmad; Adi, Tri Kustono
ALCHEMY ALCHEMY (Vol.4, No.1
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (476.65 KB) | DOI: 10.18860/al.v4i1.3150

Abstract

ABSTRACT3-(4-hydroxy-3-methoxyphenyl)-1-phenylprop-2-en-1-one has been synthezed using aldol condensation reaction from vanillin. The research aims to incrase the potency of vanillin as antioxidant. The synthesis was carried out using reflux method at 70 °C for 1,5 hours at various moles between vanillin and acetophenone i.e. 1:1; 1:1,5; and 1,5:1. The products were characterized by TLC, FTIR, GC-MS and evaluated for their antioxidant potential using DPPH (2,2-diphenyl-1-picrylhydrazyl) assay. The best product was obtained by various moles between vanillin and acetophenone at 1:1,5 as a bright yellow solid with a melting point at 65 °C; 76.56 % yield; and 87.02 % purities, with IC50 of the product is 0.179 mM. Keywords: aldol condensation, antioxidant, vanillin
Synthesis and Characterization of Zeolite Y From Bagasse Ash with Hydrothermal Temperatures Variations Using The Sol-Gel Method Ali, Soifi; Amalia, Suci; Fasya, Ahmad Ghanaim
ALCHEMY ALCHEMY (Vol.4, No.1
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (287.666 KB) | DOI: 10.18860/al.v4i1.3069

Abstract

Zeolite Synthesis Y is done using sol-gel method on the molar composition of 10Na2O: 15 SiO2: x Al2O3: 300 H2O with Si/Al on ratio of 2,43 and hydrothermal temperatures variations of 60, 80 and 100 °C. Characterization includes XRD to discover crystallinity and the purity of zeolite, FTIR for the analysis of functional groups and of the surface width with the adsorption of methylene blue. XRD result shows that the formed zeolites Y is still mixed with zeolite P, the best result in synthesis with hydrothermal temperatures of 80 °C. FTIR analysis showsthat all zeolite synthesis contain a common functionO-Si-O/O-Al-O and double ring. The surface area of zeolite Y at 60, 80 and 100 °C is 22,5522; 23,0603 and22,9898m2/gram. Keywords: Bagasse, sol-gel, temperature hydrothermal, zeolite Y
Analysis of Metal Copper Concentration at Candy using Atomic Absorption Spectrophotometry (AAS) Rahmawati, Eny; Dewi, Diana Candra; Fasya, Ahmad Ghanaim; Fauziyah, Begum
ALCHEMY ALCHEMY (Vol.4, No.1
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (357.953 KB) | DOI: 10.18860/al.v4i1.3142

Abstract

Candy sold in the market could be containing a heavy metals like copper. In this study, candy was destructed with HNO3, HNO3/H2SO4 (3:1) dan HNO3/H2SO4/H2O2 (6:2:1) to know the best matter oxidixer for copper. Then, evaluated the levels of copper using Atomic Absorption Spectrophotometer (AAS). The one way anove result with F test showed that the best oxidizer for copper in candy is HNO3/H2SO4. The average concentration of Copper in candy coded A, B, C, D, and E were 1. 72 mg/Kg; 1.69 mg/Kg; 1.57 mg/Kg; 1.71 mg/Kg; and 1.69 mg/Kg respectively. The content of copper in candies were the under daily dietary recommended limit based on SNI regulation. Key Words: Atomic Absorption Spectrophotometry, candy, matter oxidizer, time stability, wet destruction 
Oil Extraction from Rice Bran with Various Solvents and Concentration of Crude Extract to Antioxidant Activity Suryadinata, Arief
ALCHEMY ALCHEMY (Vol.4, No.1
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (344.21 KB) | DOI: 10.18860/al.v4i1.3152

Abstract

Rice bran contains components such as oryzanol antioxidants, tocopherols, tocotrienols, phytosterols, polyphenols, and squalene. Oryzanol is a very powerful antioxidant and oryzanol is only found in rice bran oil. This research aims to know the antioxidant activity of the extract chloroform:methanol in the bran and find the endurance of antioxidant against a wide variety of pH and temperature. The method used is descriptive research through experimental tests in the laboratory. Samples taken from the side of rice mills in the form of bran and then macerated with chloroform: methanol. After that tested the antioxidant activity of the compounds made by the method of DPPH with various concentration 10, 20, 30, 40 and 50 ppm. Furthermore, the endurance test of antioxidant compounds at various pH and temperature using the best concentration of antioxidant compounds. Based on the results, rice bran oil extract concentration of 50 ppm has antioxidant activity of 4.69%. Average yield the highest antioxidant activity shown in heating conditions with a temperature of 30oC for 30 minutes is equal to 32.25%. As well as the highest antioxidant activity was also shown at pH 5 in the amount of 25.1%. Keywords: DPPH, Oryzanol, Rice bran
Mercury (Hg) and Copper (Cu) Analysis of Sea Cucumber Paracaudina australis Crackers from Kenjeran Surabaya using Atomic Absorption Spectroscopy Wulandari, Alissa Wahidah; Yuliani, Dewi; Adi, Tri Kustono
ALCHEMY ALCHEMY (Vol.4, No.1
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (566.334 KB) | DOI: 10.18860/al.v4i1.3135

Abstract

Sea cucumber Paracaudina australis crackers is one of the sea foods processed which highly produced and consumed at Kenjeran Surabaya. The research aims to measure concentration of mercury and copper in fried and un-fried sea cucumber Paracaudina australis, Crackers collected from three supplier at Kenjeran Surabaya Using Atomic Absorption S Spectroscopy (AAS). The six sample were oxidized using oxidator agents  of HNO3 Pa, H2SO4 Pa, H2O2 Pa (6:2:1) under wet-closed digestion for Hg analysis and wet-opened digestion for Cu analysis. Vapor generation Accessory (VGA-AAS) was applied for measuring Hg concentration while flame AAS for Cu. The research indicated that Hg concentration in sea cucumber crackers were 0,058; 0,0149; 0,108 ppb (un-fried crackers) and 0,078; 0,074; 0,061 ppb (fried crackers) Cu concentration in sea cucumber crackers was measured as 2,037; 3,05; 3,16 ppm (un-fried crackers) and 1,164; 1,589; 1,924 ppm (fried crackers).
Synthesis and Characterization Titanium Dioxide (TiO2) Doped Vanadium(V) Using Solid State Method Mustofa, Khusnan; Aini, Nur; Khalifah, Susi Nurul
ALCHEMY ALCHEMY (Vol.4, No.1
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (499.143 KB) | DOI: 10.18860/al.v4i1.3143

Abstract

TiO2 Anatase activities should be increased from the UV to the visible light photocatalytic activity of TiO2 to increase anatas. One efforts to optimize TiO2 anatase activity is doping by using dopant vanadium(V). Synthesis method which is used in this research is a solid reaction method. The steps being taken in this methods include grinding and heating at high temperatures. Dopant concentrations of vanadium(V) which are used in the research was 0.3%, 0.5% and 0.7%. and the characterization used is X-ray diffraction and UV-Vis Diffuse Reflectance Spectroscopy. The result shows that there are a changing of particle size, band gap energy, and absorption of TiO2 anatas wavelength because of dopan vanadium(V) addition. While TiO2’s structure does not change. The crystal sizes of each TiO2 without doping, V-TiO2 0,3%, 0,5% and 0,7% are 53.21 nm, 47.67 nm, 79.65 nm dan 68.99 nm.  Band gap energy of each TiO2 without doping, V-TiO2 0,3%, 0,5% dan 0,7% are 3.309 eV, 3.279 eV, 3.270 eV and 3.259 eV. While wavelength absorption of each TiO2 without doping, V-TiO2 0,3%, 0,5% and 0,7% are 374.9 nm, 378.4 nm, 379.5 nm and 380.8 nm.  Keywords: Synthesis, titanium dioxide, vanadium(V), solid state method

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