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INDONESIA
Indonesian Journal of Chemical Science and Technology
Published by Universitas Negeri Medan
ISSN : 26221349     EISSN : 26224968     DOI : -
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology
Jurnal ini mempublikasikan artikel di bidang Kimia yang meliputi penelitian dasar dan terapan. Bentuk Publikasi di Indonesian Journal of Chemical Science and Technology : * Artikel * Review (berdasarkan permintaan Dewan Redaksi) * Communication (berdasarkan permintaan Dewan Redaksi)
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 121 Documents
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Effect of pH on Biosorption Ion Cd(II) in Solutions using Lengkuas Merah (Alpinia Gralanga) Ahmad Faris Fauzi; Lisa Utami
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 1, No 1 (2018): Juli 2018
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v1i1.10596

Abstract

The biosorption characteristic of Cd(II) ions from aqueous solution using Lengkuas Merah (Alpinia Gralanga) were investigated as a function of pH. The maximum biosorption capacity of a Lengkuas Merah (Alpinia Gralanga) for Cd(II) was found to be 18,37 mg/L and 91,85% at optimum pH was 10. At pH 2 to 10 the biosorption of Cd ions tends to increase. The result showed that the lengkuas merah  can be evaluated as an alternative biosorbent to treatment waste water containing Cd(II). A Lengkuas Merah is low cost and has considerable high biosorption capacity.
Preparation of Coconut Milk as Dandruff Removal Marini Damanik; Hafni Indriati Nasution; Rini Selly; Moondra Zubir
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 3, No 1 (2020): January 2020
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v3i1.18313

Abstract

Coconut milk is a thick white liquid extracted from coconut produced from shredded coconut and then squeezed with water. Coconut milk is an ingredient produced from processed old coconut. Coconut milk can be used as food preparations or as herbal beauty ingredients. One of the advantages of coconut milk in the field of beauty is that it is very effective as a dandruff remover. By using old coconut milk as a dandruff remover we can get amazing results with natural ingredients without spending a lot of money. Coconut milk has many contents such as water content, protein and fat which are quite high as well as cow's milk. Coconut milk is rich in vitamins C, B, B-6, thiamine, niacin, folate, a number of minerals (calcium, magnesium, iron and phosphorus). Pure coconut milk only contains 54 percent water, 35 percent fat and 11 percent nonfat solids (approximately 6 percent carbohydrates, less than 4 percent protein and other solids) which are categorized as emulsions of oil in water. Coconut milk is known to be effective in eliminating dandruff, because coconut milk contains coconut oil containing Vitramin E and fatty acids that can eliminate and eradicate dandruff. You do this by using coconut oil as a massage oil to massage the scalp.
Synthesis of Biodiesel From Rubber Seed Oil with Acid and Base Activated Natural Zeolite Catalyst Tiamina Nasution; Akhir Mauludin Pulungan; Yuli Asih Wiliranti; Junifa Layla Sihombing; Ahmad Nasir Pulungan
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 2, No 2 (2019): July 2019
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v2i2.14001

Abstract

 In this study, biodiesel synthesis was carried out using Z-AH and Z-OH Zeolite catalysts to obtain a cheaper and environmentally friendly process. The catalysts were prepared from Sarulla Indonesian natural zeolite       (Z-AS) through a chemical activation process with certain HCl 3 M and NaOH 2 M, then calcined at 500°C with Nitrogen gas for 4 hours to obtain Z-AH ang Z-OH catalyst. The catalysts were characterized by FT-IR and XRD. The conversion of rubber seed oil into biodiesel was carried out at temperature of 30 oC, 60 oC and 90 oC. The ratio of methanol: rubber seed oil is 6: 1 (v / v) and the catalyst concentration used is 1% wt. The XRD and FTIR data show that Z-AS activation increases the crystallinity of zeolite and does not damage the zeolite skeletal structure.The Z-AH catalyst has a better catalytic activity than the Z-OH catalyst with the conversion value of the biodiesel product obtained at 69.79%.
Mooney Viscosity Determination Of Rubber With A Charm Filler Rudi Munzirwan Siregar
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 4, No 1 (2021): JANUARY 2021
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v4i1.23094

Abstract

Research on the Determination of Viscosity Mooney From Rubber by Fillers Charcoal has been done. Each latex was added into the coconut shell charcoal  ( particle size 80 mesh ) were 36 , 38 , 40 , 42, and 44 gram. Then the latex is coagulated with formic acid in pH 4.7. Formic acid is used as a control for the rubber crumple without the addition of coconut shell. Research carried out by measuring the quality of rubber Money Viscosity. From the results of research it turns out that the value of the viscosity of the money obtained by the addition of charcoal to the rubber in the latex is 72.5 ; 74 ; 75.5 ; 77 ; and 75. It can be seen that the value of the best rubber Mooney viscosity of 75 , so the rubber with medium Mooney viscosity value able to provide a meeting point between the energy efficient with superior physical properties .
Making Bioethanol From Cocoa Fruit Skin Waste By Hydrolysis Process Using Trichoderma Viride Mold Tiska Oktavianis; Sofiyanita Sofiyanita
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 2, No 1 (2019): January 2019
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v2i1.12368

Abstract

Cocoa fruit skin is one of the agricultural wastes can be used as raw material for bioethanol production. Because the cocoa fruit waste containing 39.45% crude fiber and 3.92% glucose. The purpose of this study was to determine the level of optimization of yeast and fermentation time to produce maximum ethanol content. In this study the hydrolysis process cocoa leather is done using fungi Trichoderma viride and fermentation process using yeast Saccharomyses cerevisiae. While for bioethanol concentration measurements performed using vinometer. The results showed that bioethanol fermentation time for 1, 3, 5 and 7 days using yeast levels 2, 4, 6 and 8 grams produce maximum ethanol fermentation at 3 days and 6 grams yeast levels. Produced a maximum ethanol content of 12%.
Reduction of Heavy Metals Level in the Waste Water Using Phytoremediation Technique Azura Afrina; Lazulva Lazulva
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 1, No 1 (2018): Juli 2018
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v1i1.10594

Abstract

This research was carried out due to the existence of the waste heavy metals in the aquatic environment, which was very harmful to the sustainability of the environment. The purpose of this research was to find out the reduction percentage of copper metal (Cu) on the waste. This research using method phytoremediation test. The plants used were water hyacinth (Eichornia crassipes) and algae (Hydrilla verticilata). This study was conducted three times of the repetition in each variable. The measurement of Cu concentration using Atomic Absorption Spectroscopy (AAS) flame. The Results of this research was found that the efficiency of the average reduction in the concentration of Cu by water hyacinth was 82.8368% and the efficiency of the average reduction in the concentration of Cu by algae was 63.4042%.
Antibacterial Activity And Phytochemical Screening From Chromatography Fraction Of Ethanol Extract Of Sarang Banua (Clerodendrum fragrans Vent Willd) Against Salmonella enterica Murniaty Simorangkir; Ade Pratiwi Maha
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 3, No 2 (2020): July 2020
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v3i2.19525

Abstract

Ethanol extract of  sarang banua leaves (Clerodendrum fragrans) has biological activity. This study aims to isolate the fraction of ethanol extracts of Sarang Banua leaves (Clerodendrum fragrans) and test their antibacterial activity against Salmonella enterica. The isolation method uses the vacuum liquid chromatography method, with eluent n-hexane, ethyl acetate and methanol with increasing polarity levels. Antibacterial activity was carried out by the inhibitory test, the MIC (minimum inhibitory concentration) and MBC  (minimum bactericidal concentration). The results showed that the FC fraction chromatographic results of the vacuum column of ethanol extract of Sarang Banua leaf (Clerodendrum fragrans) had antibacterial activity against Salmonella enteric  with a strong inhibitory power (inhibitory zone 18.25 mm), MIC value  of 125 µg / mL and MBC value  of  125 µg / mL are included in the medium category. Inhibition, MIC and MBC values of chloramphenicol (positive control) against S. enterica were 17.40 mm; 31.2 μg / mL and 62.5 μg / mL. In the FC fraction there are higher amounts of secondary metabolites  flavonoids,  tannins, as well as small amounts of alkaloids, saponin, steroids dan triterprnoids.
Processing of Plastic Waste Into Alternative Fuels in The Form of Grounded (Pertalastic) Through Pirolysis Process in Science Laboratory of MTsN 3 West Aceh Syarifah Ratnawati
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 3, No 1 (2020): January 2020
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v3i1.18310

Abstract

Plastic is one of human needs in daily life, one of which is as a place for wrapping food and drinks, because plastic is practical, clean, and very easy to meet human needs. Increasing the level of public consumption of plastic will also increase the waste / waste produced. The waste has now become a serious environmental problem because of the increasing amount of plastic waste that exists and the level of danger that can be generated from plastic waste for other living things. In Indonesia, the demand for plastic continues to increase until it increases an average of 200 tons per year. As a result of the increased use of plastic is also increasing plastic waste. From testing utilizing existing plastic waste as mentioned above, shows a comparison that is not much different from kerosene traded on the market both in terms of color, thickness, and combustion process. it is known that polyethylene (PE) plastic with a mass of 500 grams can produce as much as 400 ml kerosene in 30 minutes.
Analysis of the Utilization of VCO as a Glucose Level Reducing Material in Brown Rice Using a UV-VIS Spectrophotometer Magdalena E Manik; Herlinawati Herlinawati
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 4, No 1 (2021): JANUARY 2021
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v4i1.23089

Abstract

This research aims to determine the effect of adding VCO on glucose levels in brown rice that cooked by rice cooker and steamer. Sample preparation is done by adding VCO to brown rice and cooking simultaneously. The samples were measured for their glucose levels by adding phenol and sulfuric acid to the sample and then measuring their absorbance using a UV-VIS spectrophotometer. The results showed that the addition of VCO affected glucose levels in brown rice. The highest level of glucose in brown rice was 32,178 ppm without the addition of VCO and the lowest level was 0.946 ppm with the addition of 5% VCO. Meanwhile, the highest level of glucose in brown rice in a steamer was 22,268 ppm without the addition of VCO and the lowest was 0,768 ppm with the addition of 5% VCO.
Red Spinach (Alternanthera amoena voss) as an Environmental Friendly Acid Base Indicator Sri Adelila Sari; Suriati Nilmarito
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 2, No 2 (2019): July 2019
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v2i2.13997

Abstract

Natural indicators are indicators that are continuously developed to determine whether a sample is acidic or basic. This study examined how red spinach can be developed into an environmentally friendly acid-base indicator that intends to be non-toxic, easy to obtain, and affordable. The natural indicator used in this study was red spinach leaf extract (Alternanthera amoena voss). The samples used were salt water, tea, pineapple, detergent, and oranges. Red spinach leaf extract was dropped on each sample which had a volume of 150mL resulting in a color change. The results of this study indicated that red discoloration occurs in samples of salt water, tea, oranges, and pineapples according to their acidic properties. Furthermore, detergent water turned to a bluish green color, and according to the basic properties of a detergent. This study concluded that red spinach leaf extract can be used as an environmental friendly natural indicator.

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