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Jurnal Kimia (Journal of Chemistry)

jchem
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Published by Universitas Udayana

ISSN : 19079850 EISSN : 25992740 DOI : 10.24843/JCHEM

Core Subject : Science,

Chemistry

Jurnal Kimia (Journal of Chemistry) publishes papers on all aspects of fundamental and applied chemistry. The journal is naturally broad in scope, welcomes submissions from across a range of disciplines, and reports both theoretical and experimental studies.

Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)

Articles 518 Documents

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SENYAWA STEROID PADA DAUN GAYAM (Inocarpus fagiferus Fosb) DAN AKTIVITASNYA SEBAGAI ANTIOKSIDAN TERHADAP DIFENILPIKRIL HIDRAZIL (DPPH) I Gusti Agung Putu Surya Adi Krisna; Sri Rahayu Santi; Ni Luh Rustini
Jurnal Kimia (Journal of Chemistry) Vol. 8, No. 2 Juli 2014
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

This research aimed to identify steroid compound from leaf of gayam (Inocarpus fagiferus Fosb) and test its antioxidant activity. Dried leaf powder of gayam was extracted with 5000 mL of 96% ethanol to yield 28,05 g concentrated extract. This extract was then fractionated into n-hexane and choloform to yield 14,18 g n-hexane and 2,21 g choloform fractions respectively. The test using Lieberman Burchard reagent showed that both fractions contain steroid, but n-hexane fraction contained more steroid than chloroform fraction. Separation of n-hexane fraction was done using silica gel column chromatography with n-hexane : ethanol (7:3) as eluent and four groups of fraction were obtained. Fraction F1 contained steroid and was relatively pure therefore it was then identified. The infrared and ultraviolet-visible spectra suggest that the isolate (F1 fraction) has functional groups such as O-H, C=O, C-H, and unconjugated C=C and showed lmax at 279,407, and 669 nm. The antioxidant test showed that the isolate had antioxidant activity toward DPPH with IC50 of 4 ppm.

PENGOLAHAN AIR LIMBAH PEMBANGKIT LISTRIK PT INDONESIA POWER DENGAN METODE FLOTASI DAN BIOFILTRASI SARINGAN PASIR TANAMAN I Wayan Budiarsa Suyasa; Iryanti Eka Suprihatin; I Gusti Ayu Kd Ravika Sugianthi
Jurnal Kimia (Journal of Chemistry) Vol. 6, No. 1 Januari 2012
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (173.134 KB)

The research about treatment on PT Indonesia Power waste water from power plant operations by flotation method and biofiltration has been carried out. This research aim to determine the optimal aeration time on the flotation process, the optimal residence time of the biofiltration to decrease the oil content and COD of waste water samples, and the capacity of the biofilter to decrease oil content and COD.The result of research shows that the optimum timing of aeration in the flotation process is 20 minutes, during which it decreases the oil content by 20.433,33 mg/L (94,60%), whereas the time to reduce the oil content to 450 mg/L is 60 minutes. Optimal residence time of waste water treatment by the sand filters is 6 hours by decreasing the oil contents to 366,67 mg/L (81,48%) and COD to 50,456 mg/L (51,08%). The time needed to reduce the oil content to 0 mg/L is 36 hours and COD to 28,084 mg/L is 48 hours. Oil content and COD of the flotation effluents and sand – biofiltration are below the thres hold of Class III Water Quality Guide lineaccording to PerGub Bali in 2007 (1 mg/L and 50 mg/L respectively). Treatment capacity of sand filter plant to reduce oil content is 8333,33 ppm/m3 hours, while to decrease COD the treatment capacity is 1295,78 ppm/m3 hours.

PENURUNAN KADAR COD, SURFAKTAN, DAN FOSFAT LIMBAH LAUNDRY DENGAN BIOSISTEM TANAMAN I Wayan Budiarsa Suyasa; A A Gede Bawa Putra; I Kadek Sutomo Putra
Jurnal Kimia (Journal of Chemistry) Vol. 10, No. 2 Juli 2016
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Telah dilakukan penelitian mengenai pengolahan air limbah laundry dengan biosistem tanaman yang divariasikan dengan dan tanpa penambahan suspensi aktif. Penelitian ini bertujuan untuk menentukan pengaruh penambahan suspensi aktif dan pengaruh waktu perlakuan terhadap perubahan kadar COD, Surfaktan, dan Fosfat pada biosistem tanaman serta menentukan kapasitas pengolahan biosistem tanaman terhadap perubahan nilai ketiga parameter tersebut. Hasil penelitian menunjukkan bahwa penambahan suspensi aktif dan waktu perlakuan dapat berpengaruh terhadap perubahan nilai COD, Surfaktan, dan Fosfat. Pengaruh suspensi aktif terlihat dari waktu minimal perlakuan untuk memenuhi baku mutu, dimana untuk parameter Surfaktan dan Fosfat pada sistem penambahan suspensi aktif memiliki waktu minimal perlakuan yang lebih cepat daripada sistem tanpa penambahan suspensi aktif. Sedangkan pengaruh waktu perlakuan terlihat dari nilai ketiga parameter tersebut, dimana semakin lama waktu perlakuan maka semakin kecil nilai dari ketiga parameter tersebut. Dari hasil uji anova (analisys of variance) menunjukkan bahwa penambahan suspensi aktif dan waktu perlakuan berpengaruh signifikan terhadap nilai COD, surfaktan dan fosfat. Kapasitas pengolahan pada sistem tanpa penambahan suspensi aktif adalah 8,7259 ppm/m3jam untuk COD, 0,7715 ppm/m3jam untuk Surfaktan dan 0,2178 ppm/m3jam. Kapasitas pengolahan sistem dengan penambahan suspensi aktif adalah 8,4500 ppm/m3jam untuk COD, 0,7821 ppm/m3jam untuk Surfaktan dan 0,2399 ppm/m3jam untuk Fosfat.

KARAKTERISTIK SIMPLISIA TEH HITAM DARI TANAMAN Camelia sinensis Var. assamica DARI PERKEBUNAN TEH BALI CAHAYA AMERTA, DESA ANGSERI, KECAMATAN BATURITI, KABUPATEN TABANAN, BALI N. L. P. V. Paramita; N. M. D. Andani; I. A. P. Y. Putri; N. K. S. Indriyani; N. M. P. Susanti
Jurnal Kimia (Journal of Chemistry) Vol.13 No.1 Januari 2019
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Black tea is a type of tea in such a way the polyphenols undergo a high degree of oxidation. The characteristics of simplicia are strongly influenced by the environment. In order to use a simplicia as an active ingredient, characterization test are required for maintaining the quality and safety. This study aimed to find out the characteristic of black tea simplicia from tea leaves (Camellia sinensis var. assamica) which were taken from Bali Cahaya Amerta Tea Plantation, Angseri Village, Baturiti Sub-district, Tabanan Regency, Bali. The characterization of the simplicia was done based on standard parameters of tea plant in Farmakope Herbal Indonesia including macroscopic test, microscopic test, the loss on drying, the contents of water soluble compound, ethanol soluble compound, total ash, acid insoluble ash, total phenol and the identification of cathecin. The results showed that black tea simplicia elongated shaped with blackish brown, odorless, tasteless, and there were fragments identifier such as sclerenkim fibers, epidermis with stomata, macrosklerida, leaf mesophyll with vascular tissue, and rosette calcium oxalate crystals. The result of the compounds content that dissolve in water was 31.84% ± 0.6446%, compounds content that dissolve in ethanol was 16.64% ± 0.414%, the loss on drying was 5.19% ± 0.0902%, total ash content was 4.67% ± 0.0392%, ash content that was insoluble in acid was 0.19% ± 0.0025%, and the total fenol content was 0.9733% ± 0.0189%. From the results, the black tea simplicia fulfills the requirements of simplicia characteristic based on Farmakope Herbal Indonesia parameter.

ISOLASI DAN IDENTIFIKASI GLIKOSIDA STEROID DARI DAUN ANDONG (Cordyline terminalis Kunth) N. W. Bogoriani
Jurnal Kimia (Journal of Chemistry) Vol. 2, No. 1 Januari 2008
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (74.181 KB)

Isolation and identification of two steroid glicosides have been conducted from Andong leaves (Cordylineterminalis Kunth). The isolate (4,0 mg white amorphous solid) was obtained after a series of chromatographicseparations. Identification of the isolate using mass spectrometry with positive electrospray showed MW 868 ascalculated from the ion peaks of m/z 891[M + Na]+, and 869[M + H]+. The ion peaks of isolate at m/z 727[(M +Na) - 164]+, 723[(M + H) - 146]+, 705[(M + H) - 164]+, and 413 [(M + H) - 456]+ of its fragments indicated thepresence of three sugars (two terminal sugars and one central sugar) from methylpentose moeity (each of MW 164)linked to an agyicone. Proton magnetic resonance spectrum of the isolate in pyridine-d5 showed characteristicproton signals for three steroid methyls (two angular methyls and one secondary methyl) at d 1.37 (s), 0.85 (s) and1.06 (d, J = 6 Hz); and one methyl group for C25 at d 0,66 ppm (d, J=6 Hz); an ethylene group at d 5.51 ppm (br d, J= 5.7 Hz); signals of the protons linked to C26 at d 4.13 and 3,49 ppm (each br d, J = 9,3 Hz and 9 Hz), and threeanomeric protons at d 6.43 ppm (br s); 5.56 ppm (br s) and 4.57 ppm (d, J = 7.0 Hz). From the above data it can beassumed that the isolate is a spirostan steroidal glicoside.

PENGGUNAAN KITOSAN DARI LIMBAH KULIT UDANG SEBAGAI INHIBITOR KEASAMAN TUAK Fikriatun Nurhikmawati; Manuntun Manurung; A. A. I. A. Mayun Laksmiwati
Jurnal Kimia (Journal of Chemistry) Vol. 8, No. 2 Juli 2014
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

The research has been conducted to determine the ability of chitosan from shrimp shell as an inhibitor of tuak acidity. Isolation of chitin is done through three stages, namely deproteination, demineralization, and depigmentation. The deacetylation process of chitin into chitosan was accomplished with 50% (w/v) NaOH with a ratio of 1:10 at 90oC for 120 minutes. 15.33 g chitin was gained (15.33%), and 9.94 g chitosan or 9.94% were obtained with a degree of deacetylation of 69.87%. The optimum concentration of kitosan to inhibit tuak pH changes was 2% (w/v) thus providing a longer shelf life with lowest acidity (pH).

QUALITY CONTROL OF GC PERFORMANCE FOR STEROID ANALYSIS Iryanti Eka Suprihatin
Jurnal Kimia (Journal of Chemistry) Vol. 5, No. 2 Juli 2011
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (120.313 KB)

This paper reports the process conducted to maintain a high quality of GC responses in obtaining reliabledata on steroid analyses of environmental samples. Works including setting up the Limit of Detection (LOD) andLimit of Quantitation (LOQ), maintaining linearity, controlling the reproducibility, and determining its reliability aredescribed. It is evident that in this work the LOD of the GC is 0.0002 ng (by 1 mL injection of 0.2 mgL-1 samples) andthe LOQ is 0.001 ng (by 1 mL injection of 1 mgL-1 samples), which means it is capable of detecting much lowerconcentrations of steroid compounds if the samples undergo 2000 times pre-concentration during preparation. Underthe range investigated the GC provides reliable quantitative linear responses to all steroid compounds.

TRANSESTERIFIKASI MINYAK BIJI KARET (Hevea brasiliensis) MENGGUNAKAN KATALIS HETEROGEN CANGKANG KEPITING LIMBAH SEAFOOD TERMODIFIKASI K2O N. K. D. Astuti; I N. Simpen; I W. Suarsa
Jurnal Kimia (Journal of Chemistry) Vol.13 No.1 Januari 2019
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

The CaO heterogeneous catalysts can be prepared by CaCO3 calcination process, with one source of CaCO3 being a crab shell from seafood waste. The preparation of the heterogeneous catalyst was successfully carried out by modification with KOH using a wet impregnation method at 800oC for 5 hours. The purpose of this research is to determine the physical and chemical characteristics of heterogeneous catalyst of K2O-modified crab shell and to examine the heterogeneous catalyst of K2O-modified shells in converting rubber seed oil into biodiesel. The results showed that the lowest basic alkalinity possessed without modified catalyst (1.0428 mmol g-1) and the highest alkali possessed potassium-modified catalyst (1.8314 mmol g-1). Characterization of specific surface area of ??crab shells without and with modified K2O were relatively the same. The surface morphology of the catalyst without and K2O modified was uniform. The catalyst examination results for conversion of rubber seed oil (Hevea brasiliensis) to biodiesel, the optimum catalyst concentration of 3% and the molar ratio of oil:methanol of 1:9 capable converting to biodiesel with the yield of 91.05%. The content of biodiesel were stearic methyl ester, linoleic methyl ester, linolenic methyl ester, and palmitic methyl ester.

STUDI PEMANFAATAN CAMPURAN ZAT WARNA ALAMI DAN ASAM SITRAT SEBAGAI MORDAN TERHADAP KAYU JENIS AKASIA DENGAN METODE SIMULTAN MORDANTING Ni Wayan Bogoriani
Jurnal Kimia (Journal of Chemistry) Vol. 5, No. 1 Januari 2011
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (72.152 KB)

Wood is one of several materials that is very useful to man kind, that even wood with low quality tends to be increasingly used. The great need for wood has been cousing wood of high quality is getting more difficult to obtain. To make wood of lows quality having high artistic value, a research to dye Acacia leucopholea wood with a mixture of natural dyes (Uncaria gambir-piper betle Linn leaves-Areca catechu seed) and 0.5 gram of citric acid in 100 mL water was conducted. To test its physical and chemical properties the treated wood 1% detergent solution was soaked in for 10 minute.The research conducted showed that the optimum mass proportion of the mixture for submertion of 10 minute with simultan mordanting method was 5.0:3.0:3.0 g (Uncaria gambir:piper betle Linn leaves:Areca catechu seed). The mixture resulted in Brown color and mean adsorption of 0.19 g of wood surface and showed highest durability against decolorization and mass loss test using 1% detergent solution.

FRAKSINASI DAN BIOAVAILABILITAS LOGAM Pb DAN Cr DALAM SEDIMEN DI PELABUHAN BENOA Ni Luh Eka Lusiana Dewi; Emmy Sahara; A. A. I. A Mayun Laksmiwati
Jurnal Kimia (Journal of Chemistry) Vol. 8, No. 1 Januari 2014
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

The fractionation and the bioavailability determination of Pb and Cr in sediment of Benoa Bay have been studied. This study was aimed to determine the metals concentration in their various chemical forms. A 63 µm nylon mesh screen was used for wet and dry sieving the sediment samples. Through fractionation, the bioavailabilities of both metals could be determined. For the total metals determinations, the samples were digested with aqua regia which is the mixture of HCl and HNO3(3:1). Fractionation was done with the application of the four steps sequential extraction technique. All metals measurements were carried out with the use of the technique of Atomic Absorption Spectrophotometry. The total concentrations of Pb in sediments sieved in wet and dry conditions were 18.4852 mg/kg and 23.3974 mg/kg, respectively, whereas the total concentrations of Cr in those of wet and dry conditions were 17.7131 mg/kg and 24.9371 mg/kg, respectively. The fractionations of Pb in sediments sieved in wet and dry conditions showed the same paterns which were as follow: freely, leachable, dan exchangeable (EFLE) fraction < Fe/Mn-oxide fraction < resistant fraction < organic dan sulfide fraction. The fractionation of Cr in wet sieved sediment was as follows: EFLE fraction < resistant fraction < organic and sulfide fraction < Fe/Mn-oxide fraction whereas that of Cr in dry sieved sediment was as follows EFLE< Fe – Mn oxide fraction < resistant fraction < organic and sulfide fraction. The bioavailable and resistant fractions found for Pb in wet sieved sediment were 74.13% and 22.88%, respectively, whereas those of Pb found in dry sieved sediment were 82.84% dan 13.85%, respectively. The bioavailable and resistant fractions found for Cr in wet sieved sediment were 77.59% and 11.23%, respectively, whereas those of Cr in dry sieved sediment were 90.55% and13.21%, respectively.

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Ni Putu Diantariani

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Home Page

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Contact Name Ni Putu Diantariani

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Editorial Address Program Studi Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Udayana Kampus Bukit Jimbaran, Jimbaran, Bali, Indonesia

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Contact Name
Ni Putu Diantariani

Contact Email
jurnalkimia@unud.ac.id

Phone
+628123640424

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jurnalkimia@unud.ac.id

Editorial Address
Program Studi Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Udayana Kampus Bukit Jimbaran, Jimbaran, Bali, Indonesia

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Bali

INDONESIA