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NOOR HUBDRYAWATI
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jurnalkimiaunmul@gmail.com
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Jl.Barong Tongkok no.04 Kampus Gn.kelua Samarinda Kalimantan Timur
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INDONESIA
Jurnal Kimia Mulawarman
Published by Universitas Mulawarman
ISSN : 16935616     EISSN : 24769258     DOI : DOI: https://doi.org/10.30872/jkm
Core Subject : Science,
Chemistry
Journal of Kimia Mulawarman is a peer-reviewed, open access journal that publishes original research articles, review articles, as well as short communication in all areas of chemistry, including educational chemistry and applied chemistry.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 11 Documents
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Search results for , issue "Vol 13 No 1 (2015)" : 11 Documents clear
ANALISIS KAFEIN DALAM KOPI ROBUSTA (TORAJA) DAN KOPI ARABIKA (JAWA) DENGAN VARIASI SIKLUS PADA SOKLETASI Tria Annisa Rizky; Chairul Saleh; Alimuddin -
JURNAL KIMIA MULAWARMAN Vol 13 No 1 (2015)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

The research about analysis of caffeine content on coffee Robusta (Toraja) and coffee Arabika (Jawa) with cycle variations using spectrophotometer UV has been done. Coffee extract obtained throughsoxhletation with ethanol 96 % and variation cycles used is 3, 6, 9, 12 and 15, tested with spectrophotometer UV at a wavelength of 272 nm. The result of this research was obtained the caffeine content in coffee Robusta (Toraja) for 3, 6, 9, 12, 15 cycles consecutive is 1.439 mg/L, 2.158 mg/L, 2.695 mg/L, 2.887 mg/L and 3.700 mg/L. The caffeine content obtained coffee Arabika (Jawa) for 3, 6, 9, 12, 15 cycles consecutive is 0.474 mg/L, 0.478 mg/L, 1.056 mg/L, 1.540 mg/L and 1.926 mg/L respectively.Keywords: Coffee Robusta, Coffee Arabika, Ethanol 96 %, Soxhletation, Caffeine, Spectrophotometer UV
ANALISIS PERUBAHAN KADAR LOGAM TEMBAGA (Cu) PADA PENAMBAHAN ION PERAK (Ag) DENGAN METODE ELEKTROKOAGULASI Agustin Pratiwi; Bohari Yusuf; Rahmat Gunawan
JURNAL KIMIA MULAWARMAN Vol 13 No 1 (2015)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

The analysis of changes in levels of copper (Cu) on the addition of silver ions (Ag) with electrocoagulation method has been researched by using Atomic Absorption Spectrophotometer (AAS) as an instrument for the determination of levels. The addition of ionic silver (Ag) in a solution of copper (Cu) using varying concentrations of silver (Ag) 4, 6, 8, 10 and 12 ppm. The results showed that the effect of the addition of ionic silver (Ag) 4,6, 8, 10 and 12 resulted in changes in the levels of copper (Cu) are deposited successively in the ppm concentration is 9.375; 9.324; 9.272; 9.168; 9.142 and 9.116. Metalcontentof silver(Ag) in a medium containing copper (Cu) with a variety of metallic silver( Ag) differentat 4, 6, 8, 10 and 12ppm after the electrocoagulation metal contentof silver(Ag) depositedin the amount3.99; 5.99; 7.96; 9.91 and 11.88ppm.
PEMANFAATAN ARANG AKTIF DARI KULIT DURIAN (Durio zibethinus L.) SEBAGAI ADSORBEN ION LOGAM KADMIUM (II) Marlinawati -; Bohari Yusuf; Alimuddin -
JURNAL KIMIA MULAWARMAN Vol 13 No 1 (2015)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

The research of adsorption cadmium (II) metal ions in the solution by activated carbon from durian peel has been done. Adsorption process is done by using a variation of pH (1, 2, 3, 4, 5 and 6), variation of contact time (15, 30, 45, 60, 75 dan 90 menit), variation of the concentration (20, 30, 40, 50 dan 60 mg/L). Analysis of metal ion concentration of cadmium (II) used by Atomic Absorption Spectrophotometer (AAS). The results of this research shows that the optimum condition was achieved at the pH value of 4 and the contact time of 60 minutes. Metal ion adsorption of cadmium (II) by activated carbon from durian’s peel at pH value of 4 and the contact time of 60 minutes can achieve 64,540%. Metal ion adsorption capacity of cadmium (II) adsorbed by activated carbon from durian’s peel can achieve 0,4951 mg/g.Keywords : Adsorption, Activated Carbon, Durian Peel, Metal Ions Cadmium (II)
PENURUNAN KADAR ION LOGAM KROMIUM PADA LIMBAH INDUSTRI SARUNG SAMARINDA DENGAN MENGGUNAKAN METODE ELEKTROKOAGULASI Yulianti Kartika; Aman Sentosa Panggabean; Rahmat Gunawan
JURNAL KIMIA MULAWARMAN Vol 13 No 1 (2015)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

The reduction of chromium concentration in Samarinda sarong wastewater by electrocoagulation method has been carried out. The research used Atomic Absorption Spectrophotometer (AAS) as an instrument determination level. To determination the optimum levels of each parameters by large percent qualified of electrocoagulation process with used variation of series parameters such as time contact, variation voltage and the distance of electrode. The result of research showed that degradation and is big of elimination percent of metal of Cr have an in with the effect of time contact, voltage and also distance of electrode at optimum hence in getting result of final concentration successively 31,250; 21,325 and 17,925 ppm of concentration early 50,650 ppm. Big of elimination percent of exclusion at optimum parameter in getting result successively 38,302; 57,897 and 64,610 %. Resulted in this research obtained optimum time contact is 30 minutes, optimum voltage is 4,5 volt and optimum distance of electrode is 1 cm.Keywords: Chromium, Samarinda sarong wastewater, Electrocoagulation, Metal electrode
PENURUNAN GARAM KLORIDA AIR LAUT DENGAN MEMANFAATKAN MODIFIKASI PATI DARI LIMBAH BONGGOL PISANG AMBON (Musa paradisiaca var sapientum) Aulia Husna Rabbani; Alimuddin -; Chairul Saleh
JURNAL KIMIA MULAWARMAN Vol 13 No 1 (2015)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

The research of desalination the sea water by utilization of the strach bump a “Pisang Ambon (Musa paradisiaca var sapientum)” modification has been done. Modification of starch bump “Pisang Ambon (Musa paradisiaca var sapientum)” had be a ability better than starch bump “Pisang Ambon (Musa paradisiaca var sapientum)” in the levels of chloride. The variation upon which to do to absorb chloride of sea water which are starch, starch been activated NaOH and starch acetate bump of a “Pisang Ambon (Musa paradisiaca var sapientum)”. Where The characteristic of the third ingredients were done by analysis FT-IR that showed the spectrum in the wavenumber of each of which are read the force –OH,C-H streaching, C-H bending, CO ester in the spectrum of starch and starch been activated with NaOH and then are read the ester C=O in the wave number of 1751,36/cm and C-O ester and forth on the wave number of 1234,44/cm to the full spectrum of starch acetate. The rendemen a modification of the starch was also shown the modified starch in the bump a “Pisang Ambon (Musa paradisiaca var sapientum)” then more starch obtained. And which after passed a sample of starch bumb “Pisang Ambon (Musa paradisiaca var sapientum)” wet sea water left in levels chloride 20.160,77 mg/L, in the starch bump “Pisang Ambon (Musa paradisiaca var sapientum)” dry sea water left in levels of chloride 19.783,23 mg/L, in the starch bump “Pisang Ambon (Musa paradisiaca var sapientum)” have been activated with NaOH wet sea water left in the levels of chloride 19.405,68 mg/L, in the starch bump “Pisang Ambon (Musa paradisiaca var sapientum)” have been activated with NaOH dry sea water left in levels of chloride 19.028,14 mg/L and in the starch acetat bump “Pisang Ambon (Musa paradisiaca var sapientum)” sea water left in levels of chloride 18.461,83 mg/L.Keywords: the water of the sea, salt chloride, spectrum FTIR, starch and modification of starch bump a Pisang Ambon (Musa paradisiaca var sapientum)
ANALISIS KANDUNGAN KAFEIN DALAM KOPI SUMATERA DAN KOPI FLORES DENGAN VARIASI SIKLUS MENGGUNAKAN SPEKTROFOTOMETER UV-VIS Nadhirah -; Alimuddin -; Chairul Saleh
JURNAL KIMIA MULAWARMAN Vol 13 No 1 (2015)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

The research about analysis of caffeine content on coffee Sumatera and coffee Flores with cycle variations using spectrophotometer UV-Vis has been done. Coffee extract obtained through soxhletation with ethanol 96% and variation cycles used is 3, 6, 9, 12 and 15. The extract obtained is dissolved in ethanol 96% and tested with spectrophotometer UV-Vis at a wavelength of 272 nm. The result obtained in this research is the caffeine content in coffee Sumatera for 3, 6, 9, 12, 15 cycles consecutive are 0.582 mg/L; 0.986 mg/L; 1.315 mg/L; 2.143 mg/L and 2.918 mg/L. While the caffeine content obtained coffee Flores for 3, 6, 9, 12, 15 cycles consecutive are 0.465 mg/L; 0.599 mg/L; 0.728 mg/L; 1.186 mg/L and 1.653 mg/L.Keywords : Coffee Sumatera, Coffee Flores, Ethanol 96%, Soxhletation, Caffeine, Spectrophotometer UV-Vis
OPTIMASI KINERJA ANALITIK PADA PENENTUAN KADAR FOSFOR SEBAGAI P2O5 PADA ABU BATUBARA DENGAN METODE SPEKTROFOTOMETER VISIBLE Eka Apriska S Kusuma; Aman Sentosa Panggabean; Yasser Arafat
JURNAL KIMIA MULAWARMAN Vol 13 No 1 (2015)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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The research on optimization of analytical performance in the determination of phosphorous as P2O5 content in the coal ash with visible spectrophotometer method has been done. In this research was conducted validation visible spectrophotometer method to establish the levels of phosphorus in coal ash. Validation parameters used in this research were accuracy, precision, linearity, LOD, LOQ and ruggedness methods. From the result of this research, accuracy was stated in percent recovery, precision was stated as a RSD percent, withthe equation of linearity as y=0,1768x - 0,0076. From the equation, it will be obtained LOD and LOQ values. And endurance test methods that varied the length of it digest time. From the results it can be concluded that the determination of phosphorous content in the coal ash using visible spectrophotometer method has good precisionand accuracy, and able to be justifiedKeywords: Coal, Phosporous, Analytical Performance, Visible Spectrophotometer.
ANALISIS FITOKIMIA DAN TOKSISITAS (BRINE SHRIMP LETHALITY TEST) EKSTRAK SERBUK SARI DARI Trigona incisa Novalien Fiergiyanti; Erwin -; Syafrizal -
JURNAL KIMIA MULAWARMAN Vol 13 No 1 (2015)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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The phytochemical, brine shrimp lethality and activity antioxidant test and secondary metabolits of bee pollen have been conducted. The pollen samples are extract with solvent ethanol by masseration method and that is concentrated by using rotary evaporator. The ethanol crude extract obtained are fractioned with solvent ethanol and solvent ethyl acetat. Based on secondary metabolits phytochemical test of bee pollen showed that ethanol crude extract contains alkaloid and fenolik. Ethanol fraction extract contains alkaloid. Ethyl acetat fraction extract contains alkaloid and fenolik. In brine shrimp lethality test, the increase larvae (Artemia salina L.) death and data was yielded recorded then processed using SAS Probit Analysis to determine the lethal concentration 50% (LC50) value. The results of this test obtained data and showed that the most active fraction is ethanol fraction extract with value of LC50 was equel to 249,60 ppm.Keywords: Bee pollen, phytochemical test, brine shrimp lethality test (BSLT).
Potensi Pemanfaatan Ekstrak Kubis Ungu (Brassica oleracea L.) sebagai Indikator Asam Basa Alami Erwin -; Muhammad Asfian Nur; Aman Sentosa Panggabean
JURNAL KIMIA MULAWARMAN Vol 13 No 1 (2015)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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The study of potential use of extracts and fractions of purple cabbage (Brassica oleracea L.) as an indicator of acid-base has been conducted. This research aims to determine the color change at a certain pH to extract total, n-hexane, ethyl acetate and methanol fraction. Based on the results of the test changes color only total extracts and methanol fraction that is suitable as indicator. Statistical test that the t test for total titration end point extracts, t calculate is smaller than t table [0.4241 <2.776], it showed no significant difference between the endpoint using the total extract with bromine thymol blue indicator. While the endpoint for methanol fraction having t calculategreater than t table [6.323> 2.776],indicating the end point of the titration using methanol fraction was significantly different compared with bromine thymol blue indicator.Keywords: Brassica oleracea L, indicator, and acid-base
UJI TOKSISITAS DAN AKTIVITAS ANTIBAKTERI EKSTRAK DAUN MERAH TANAMAN PUCUK MERAH (Syzygium myrtifolium Walp.) TERHADAP BAKTERI Staphylococcus aureus DAN Escherichia coli Nur Aini Haryati; Chairul Saleh; Erwin -
JURNAL KIMIA MULAWARMAN Vol 13 No 1 (2015)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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A research aims to know the toxicity of Pucuk Merah (Syzygium myrtifolium Walp.) red leaves extracts against brine shrimp Artemia salina Leach and its bioactivity against Escherichia coli and Staphylococcus aureus has been carried out. The dried samples were macerated with ethanol and were fractionated with n-hexane, ethyl acetate and ethanol-water. Phytochemical test showed the presence of alkaloids, triterpenoids, steroids, saponins, phenolic and flavonoid in ethanol extract. n-Hexane fraction contained alkaloids, triterpenoids and steroids, ethyl acetate fraction contained alkaloids, triterpenoids, phenolic and flavonoid while ethanol-water fraction contained triterpenoids, saponins and phenolic. Brine Shrimp Lethality Test showed that ethyl acetate fraction had the highest bioactivity in Artemia salina Leach with LC50 values of 149.8600 ppm. Antibacterial activity test using agar diffusion method showed that ethyl acetate fraction had the highest inhibiton against Staphylococcus aureus whereas total extract had the highest inhibition against Escherichia coli with MIC values of 0,5%. These results showed that Syzygium myrtifolium Walp. red leaves extract potential as an antibacterial agent.Keywords: Syzygium myrtifolium Walp., Toxicity, Antibacterial

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