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INDONESIA
JURNAL ATOMIK
Published by Universitas Mulawarman
ISSN : 25490052     EISSN : 25490052     DOI : -
Core Subject : Science, Social, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science
Jurnal Atomik (JA) is published twice a year (March and August) by Department of Chemistry, Faculty of Mathematics and Natural Sciences, Mulawarman University. Jurnal Atomik is a media for graduate students of Department of Chemistry to publish their research articles in Chemistry field including Analytical Chemistry, Inorganic Chemistry, Physical Chemistry, Organic Chemistry, and Biochemistry. The research articles that be submitted to Jurnal Atomik have to be approved by Editorial Board and in accordance with the rules of writing approved by Editor of Jurnal Atomik.
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Articles 8 Documents
 1 
Search results for , issue "Vol 7 No 1 (2022)" : 8 Documents clear
Daya Antibakteri Extrak Metanol Batang Melicope glabra (BI.) T.G. Hartley Purnamasari, Ade Rezki; Astuti, Winni; Marliana, Eva
JURNAL ATOMIK Vol 7 No 1 (2022)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

ABSTRAK Uji fitokimia dan uji aktivitas antibakteri ekstrak metanol batang Melicope glabra (BI.) T.G. Hartley telah dilakukan. Ektraksi sampel batang Melicope glabra dilakukan dengan metode maserasi menggunakan pelarut metanol. Uji aktivitas antibakteri dilakukan menggunakan metode difusi agar. Hasil uji fitokimia menunjukkan ekstrak metanol batang Melicope glabra mengandung senyawa metabolit sekunder flavonoid, fenolik, triterpenoid dan steroid. Nilai MIC (Minimum Inhibitory Concentration) ekstrak metanol batang Melicope glabra (BI.) T.G. Hartley untuk bakteri Salmonella typhi adalah pada konsentrasi 1,25%, sedangkan untuk bakteri Staphylococcus aureus adalah pada konsentrasi 2,5%. Ekstrak metanol batang Melicope glabra (BI.) T.G. Hartley memiliki aktivitas antibakteri dengan spektrum luas. Kata Kunci : Melicope glabra (BI.) T.G. Hartley, aktivitas antibakteri, metabolit sekunder
PENENTUAN KADAR AMONIA (NH3) PADA AIR SUNGAI MAHAKAM MENGGUNAKAN SPEKTROFOTOMETER DENGAN METODE FENAT Kusumastuti, Meidina; Sitorus, Saibun; Gunawan, Rahmat
JURNAL ATOMIK Vol 7 No 1 (2022)
Publisher : Jurusan Kimia FMIPA UNMUL

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Determination of Ammonia Levels (NH3) in Mahakam River Water at 5 points around the city of Samarinda has been carried out. The method used is to use a spectrophotometer by the phenate method. The results obtained at these five points are samples of Mahakam river water (Loa Janan Ilir), Mahakam river water (Samarinda Seberang), Mahakam river water (Sungai Kunjang), Mahakam river water (Samarinda Kota) and Mahakam river water (Sambutan) respectively with a concentration was 0.1043 mg/L; 0.1141 mg/L; 0.1303 mg/L; 0.0812 mg/L and 0.1214 mg/L. These results indicate that the highest ammonia concentration is in the Mahakam River (Sungai Kunjang), which is possible due to the high activity of ships. Keywords: Ammonia, phenate method and Mahakam River
PEMANFAATAN ARANG AKTIF SERBUK GERGAJI KAYU BANGKIRAI (Shorea lavefolia Endert) SEBAGAI ADSORBEN PELUMAS (OLI) BEKAS Youlanda, Desy; Sitorus, Saibun; Yusuf, Bohari
JURNAL ATOMIK Vol 7 No 1 (2022)
Publisher : Jurusan Kimia FMIPA UNMUL

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The use of bangkirai wood sawdust as adsorbent for used lubricant (oil) adsorption has been carried out. The purpose of this research is to find out how activated charcoal from bangkirai wood sawdust (Shorea Lavefolia Endert) can be used as a lubricating adsorbent (oil) seen from the testing and characterization of activated charcoal. The process of making bangkirai wood sawdust activated charcoal 0 is through a carbonization process at 500 C for 15 minutes and an activation process is carried out in activated charcoal by soaking using 25% H3PO4 solution for 24 hours. Determination of the quality of activated charcoal is carried out by testing the moisture content, ash content and iodine absorption capacity. The results obtained were the water content of activated charcoal H3PO4 25% which was 1,0590%, the ash content of activated charcoal H3PO4 25% was 0,0998% and the absorption capacity of activated charcoal H3PO4 activated charcoal 25% was 375,3253 mg/g. The optimum conditions for the adsorption of used lubricant (oil) were using activated charcoal adsorbent bangkirai wood sawdust, namely the mass of 1,5 grams and the contact time of 30 minutes. Keywords: Adsorption, Oil, Activated Charcoal, sawdust, bangkirai wood
PEMANFAATAN LARUTAN NATRIUM KLORIDA (NaCl) UNTUK MENURUNKANKADARSIANIDAPADA REBUNG BAMBU KUNNG (Bambusa vulgaris Schrad. Ex J.C) SECARASPEKTROFOTOMETRI UV-VIS Oman, Aries; Sitorus, Saibun; Saleh, Chairul
JURNAL ATOMIK Vol 7 No 1 (2022)
Publisher : Jurusan Kimia FMIPA UNMUL

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Penelitian tentang pemanfaatan larutan natrium klorida (NaCl) untuk menurunkan kadar sianida pada rebung bambu kuning (Bambusa vulgaris Schrad. Ex J.C) secara spektrofotometri UV-Vis telah dilakukan. Penelitian kali ini berfokus pada penggunaan variasi konsentrasi dan lama perendaman larutan NaCl untuk menurunkan kadar sianida pada rebung bambu kuning. Hasil penentuan kadar sianida awal sampel rebung bambu kuning (Bambusa vulgaris) sebesar 1,1051 ppm. Konsentrasi larutan NaCl yang efektif untuk menurunkan kadar sianida pada rebung bambu kuning (Bambusa vulgaris) yaitu NaCl 5% dimana kadar sianida yang diperoleh sebesar 0,3949 ppm dengan persentase penurunan sebesar 64,3% lalu lama perendaman yang efektif menggunakan larutan NaCl 5% untuk menurunkan kadar sianida pada rebung bambu kuning (Bambusa vulgaris) yaitu selama 3 Jam dimana kadar sianida yang diperoleh sebesar 0 ppm dengan persentase penurunan sebesar 100%.
AKTIVITAS ANTIBAKTERI EKSTRAK METANOL DAUN TANAMAN SAMBUNG URAT (Cayratia carnosa) TERHADAP Salmonella thypi and Propionibacterium acnes Inna, Mutma; Astuti, Winni; Saleh, Chairul
JURNAL ATOMIK Vol 7 No 1 (2022)
Publisher : Jurusan Kimia FMIPA UNMUL

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This research was conducted to the content of secondary metabolite of methanol extract of Cayratia carnosa leaf and activity toward Salmonella thypi and Propionibacterium acnes. The phytochemical test has tested by color testing and antibacterial activity carried out by agar diffution method. The secondary metabolites contained in the methanol extract from the Cayratia carnosa leaf are Flavonoids, Steroid and phenolic. Methanol extract from Cayratia carnosa leaf has a wide range of action. The value of Minimun Inhibitory Concentracion (MIC) for methanol extracts from the Cayratia carnosa leaf toward Salmonella thypi is between 6 to 8% and Propionibacterium acnes between 0.5 to 1%. Keywords: Cayratia carnosa (Link) Gagnepain, Phytochemical test, Antibacterial activity.
PEMBUATAN DAN KARAKTERISASI ADSORBEN KITOSAN–SILIKA DAN PENGAPLIKASIAN TERHADAP ADSORPSI ION Cd2+ Nisa, Muflihatu Khoiratun; Lianasari, Ika Yekti; Koesnarpadi, Soerja
JURNAL ATOMIK Vol 7 No 1 (2022)
Publisher : Jurusan Kimia FMIPA UNMUL

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The Research has been conducted on the synthesis of chitosan-silica adsorbents from chitosan and silica derived from TEOS (Tetraethyl Orthosylicate). The chitosan-silica was made by mixing chitosan solution and silica soles that were previously chitosan we were added with acetic acid and silica solution we were added with aqueous solution, ethanol and HCl(p). The result from characterization of FT-IR chitosan-silica adsorbents indicates the presence of OH, NH2, Si-O, Si-O-Si, chitosan adsorbents that only have OH and NH2 groups and silica adsorbents that only have OH, Si-O and Si-O-Si groups. Application of chitosan, silica and chitosan-silica adsorbents to adsorp Cd2+ ion. Cd2+ ion concentration after adsorption was determined by atomic absorption spectrophotometer (AAS). Adsorption Cd2+ ion in chitosan-silica successfully indexed Cd2+ by 98.67% while for chitosan adsorbents by 97.87% and while silica adsorbents by 79.45%. The Sem results showed that when adsorbents before soaking with Cd2+ it was seen that the morphology of the surface of the pores adsorbent there is still a cavity then when after soaking with Cd2+ pores filled by ions Cd2+.
RESPON TRAKEOSPASMOLITIK EKSTRAK METANOL DAUN Macaranga lamellata Whitmore SECARA IN VITRO Afandi, Irvan; Astuti, Winni; Marliana, Eva
JURNAL ATOMIK Vol 7 No 1 (2022)
Publisher : Jurusan Kimia FMIPA UNMUL

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The research about in vitro trakeospasmolytic response of methanol extract of Macaranga lamellata Whitmore leaves was carried out. This research was conducted to determine the spasmolytic effect of the methanol extract of Macaranga lamellata Whitmore leaves on changes in separate organ of the guinea pig ring tracheal. The methods used include the bioassay isolated organ with two groups of treatment, control group and extract group. Methanol extract was given cumulatively on the organ bath. Positive control is used aminofilin and negative control is used DMSO solvent. Phytochemical test results showed that total methanol extract contained alkaloids, polyphenol, steroids, flavonoids dan saponins while phytochemical test results showed on ethyl acetate fraction contained alkaloids, polyphenol, steroids, quinons dan flavonoids. The Percentage change in tracheal smooth muscle as a spasmolytic response by using methanol extract with cumulative concentration of 0.3, 1 dan 3 mg/mL respectively -24.925%; -29.865% and -36.795% . This research is shown methanol extract of Macaranga lamellata Whitmore leaves have antiasthma effect based on the tracheospasmolytic activity. Keywords: Antiasthma, Bioassay isolated organ, Macaranga lamellata Whitmore, Marmot, Trakeopasmolytic.
ADSORPSI SENYAWA ASAM BENZOAT MENGGUNAKAN KARBON AKTIF BATANG PISANG (Musa Paradisiaca. L) Iswara, Muhammad Wahyugo; Sitorus, Saibun; Gunawan, Rahmat
JURNAL ATOMIK Vol 7 No 1 (2022)
Publisher : Jurusan Kimia FMIPA UNMUL

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Research on the adsorption of benzoic acid compounds using activated carbon of banana stems (Musa paradisiaca L) has been carried out. The method used is adsorption with activated adsorbent modification. SEM morphological results on banana stems showed differences before and after activation. From the research results obtained the optimum adsorption concentration of activated carbon of banana stems at adsorbent weight of 0.6 grams, xylene concentration of 40 ppm and adsorption capacity of 1.165 mg/g. Optimum time of activated carbon of banana stem was 0.4 gram, adsorption time was 45 minutes and adsorption capacity was 1.772 mg/g.

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