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All Journal CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) INDONESIAN JOURNAL OF LEGAL AND FORENSIC SCIENCES Jurnal Kimia (Journal of Chemistry) Buletin Udayana Mengabdi Jurnal Media Sains LIMNOTEK

I Wayan Suirta

Program Studi Kimia FMIPA Universitas Udayana, Jimbaran, Bali, Indonesia

Author-ID : 2921954

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Dentistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Environmental Science Immunology & microbiology Law, Crime, Criminology & Criminal Justice Medicine & Pharmacology

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ISOLASI, IDENTIFIKASI, SERTA UJI AKTIVITAS ANTIBAKTERI PADA MINYAK ATSIRI SEREH WANGI (Cymbopogon winterianus Jowitt) Ni Made Puspawati; I Wayan Suirta; Saeful Bahri
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

Sereh wangi (Cymbopogon winterianus Jowitt) merupakan salah satu tanaman yang dimanfaatkan sebagai obat tradisional. Penelitian ini bertujuan untuk menguji aktivitas antibakteri dan mengidentifikasi komposisi senyawa kimia minyak atsiri yang diekstraksi dari daun dan batang sereh wangi. Ekstraksi minyak atsiri dilakukan menggunakan metode destilasi uap dan komposisi kimianya diidentifikasi dengan KG-SM (Kromatografi Gas-Spekrometer Massa). Minyak atsiri yang diekstrak dari daun dan batang sereh wangi berwarna kuning muda dengan rendemen berturut-turut 0,31% dan 0,10%. Hasil uji aktivitas antibakteri terhadap bakteri Eschericia coli dan Staphylococcus aureus menunjukkan bahwa aktivitas antibakteri minyak atsiri daun dan batang sereh wangi bergantung pada konsentrasinya. Pada konsentrasi minimum 25 ppm, minyak atsiri daun aktif dengan diameter hambat sebesar 4,0 mm untuk E.coli dan 3,0 mm untuk S.aureus. Aktivitas penghambatan yang kuat terhadap bakteri E.coli didapatkan pada konsentrasi 100 ppm (10,25 mm pada daun dan 10,62 mm pada batang) dan terhadap S.aureus pada konsentrasi 100 ppm (11,25 mm pada batang). Hasil identifikasi dengan KG-SM, minyak atsiri pada daun dan batang memberikan 12 puncak senyawa dengan waktu retensi yang sama dengan luas area yang berbeda pada kromatogramnya. Hal ini menunjukkan komposisi kimia yang sama pada minyak atsiri daun dan batang sereh wangi. Berdasarkan hasil identifikasi dapat disimpulkan bahwa komponen utama dari minyak atsiri daun dan batang sereh wangi adalah sitronellal, cis-sitral, geraniol dan geranil asetat.

ISOLASI DAN IDENTIFIKASI SENYAWA AKTIF LARVASIDA DARI BIJI MIMBA (Azadirachta indika A. Juss) TERHADAP LARVA NYAMUK DEMAM BERDARAH (Aedes aegypti) I W. Suirta; N. M Puspawati; N. K. Gumiati
Jurnal Kimia (Journal of Chemistry) Vol. 1, No. 2 Juli 2007
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 (354.573 KB)

Isolation and identification of larvicidal active compounds towards Aedes aegypti from Mimba seed havebeen conducted. One kilogram dry powder of Mimba seed was extracted with ethanol at room temperature.Evaporation of ethanol gave 30 g of crude ethanol extract which showed activity against Aedes aegypti (LC50282.29). This extract was dissolved into methanol-water (7:3) and was then partitioned with n-hexane, chloroformand ethyl acetate respectively. The three extracts obtained i.e. n-hexane, chloroform and ethyl acetate were showedtheir activity against Aedes aegypti in which the-n-hexane extract was the most active with LC50 of 143.97.Therefore the n-hexane extract was further purified using silica gel column chromatography with chloroform:nhexane(9:1) as eluent. Three fractions was obtained i.e. F1, F2 and F3 and they were all active against Aedes aegyptiwith LC50 78.45, LC50 113.54 and LC50 58.70 respectively. It can be seen that F3 was the most active fractions butfrom TLC result, F1 showed the relatively pure compounds since it only gave one spot. Therefore F1 was furtheridentified using pyhtochemical testing, Uv-Vis, infrared and GC-MS. It was found that the larvicidal activecompounds F1 was belong to carboxylic acids groups,with l max 290.1 having functional groups such as methyl,methylene and carbonil. Identification using GC-MS indicated that the larvicidal active compounds F1 was assumedto be a combination of 7 compounds derived from carboxylic acids including hexa-decanoic acid, etil-hexadecanoate,oleic acid, etyl-oleate ester, octadecanoic acid, etyl-octadecanoate and dioctyl-hexadioate.

KANDUNGAN FORMALIN PADA IKAN BANDENG (Chanos chanos) DI PASAR TRADISIONAL DAN MODERN DI DENPASAR Dewi Novita Hardaningsih; Ketut Gede Dharma Putra; I Wayan Suirta
Jurnal Kimia (Journal of Chemistry) Vol. 11. No.2 Juli 2017
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Telah dilakukan analisis kandungan formalin pada ikan bandeng di pasar tradisional dan modern di Denpasar. Ikan bandeng (Chanos chanos) diambil pada 4 lokasi yang berbeda dengan 2 lokasi di pasar tradisional dan 2 lokasi di pasar modern. Kandungan formalin dalam sampel dianalisis dengan alat spektrofotometri UV-Vis. Hasil analisis menunjukkan adanya kandungan formalin pada ikan bandeng. Konsentrasi formalin pada ikan bandeng sampel A dan B berturut-turut sebesar 15,16 ppm dan 13,44 ppm sedangkan pada sampel C dan D berturut-turut sebesar 21,85 ppm dan 15,71 ppm.

SUPLEMEN EKSTRAK DAUN SIRIH, Piper betle, Lin DALAM MENURUNKAN KADAR MALONDIALDEHID PADA TIKUS WISTAR I W. Suirta; I. A. R. A. Asih
Jurnal Kimia (Journal of Chemistry) Vol.13 No.2 Juli 2019
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Betel leaf extract supplements, Piper betle Lin , was made by extracting maceration of betel leaves with ethanol 96%. Phytochemical screening of betle leaf extract obtained secondary metabolites such as : terpenoids, steroids, phenolics, and saponins . The results of the antioxidant activity test test showed that n-hexane fraction was more reactive as an antioxidant (IC50 26,73 mg/L) than the diethyl ether fraction (IC50 114,54 mg/L). The MDA analysis showed that the betel leaves have a very good ability to reduce MDA levels. The concentration of MDA with addition of allopurinol (as positive control) was 0,41±0,0021?L/mL, while with addition of betel leaves the level was 0,44±0,0021?L/mL. The structure identification obtained active antioxidant compounds such as: cavicol, eugenol, caryophilene and isoeugenol. Keywords : betel leaf, malondialdehyde, Piper betle, wistar rat

ISOLASI DAN IDENTIFIKASI SENYAWA FLAVONOID PADA DAUN SEMBUKAN (Paederia foetida L) SERTA UJI AKTIVITASNYA SEBAGAI ANTIOKSIDAN Minanti Arna Ekawati; I Wayan Suirta; Sri Rahayu Santi
Jurnal Kimia (Journal of Chemistry) Vol. 11. No. 1 Januari 2017
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Sembukan adalah tumbuhan liar yang batang dan daunnya telah dimanfaatkan sebagai obat tradisional karena terdapat metabolit sekunder seperti flavonoid, alkaloid, minyak atsiri, dan steroid. Penelitian ini bertujuan untuk mengidentifikasi golongan senyawa flavonoid serta menguji aktivitas antioksidannya. Hasil maserasi 1,2 kg daun sembukan kering menghasilkan ekstrak kental etil asetat 0,34 g, n-butanol 3,12 g, dan air 26,85 g yang positif flavonoid. Pemisahan 3,12 g ekstrak n-butanol dengan kromatografi lapis tipis (KLT) preparatif dengan fase gerak n-butanol : asam asetat glasial : akuades (BAA) menghasilkan 5 fraksi dan 2 fraksi diantaranya yaitu fraksi F2 dan F4 positif flavonoid. Hasil analisis Fraksi F2 dengan FTIR menunjukkan bahwa isolat memiliki gugus fungsi C-H aromatik dan C=C aromatik, OH, C=O, CH alifatik, C-O alkohol, dan C-O eter, sedangkan analisis dengan spektrofotometer UV-Vis menunjukkan isolat menyerap pada panjang gelombang 315,60 nm (bahu) dan 283,80 nm sehingga diduga isolat adalah senyawa flavonoid golongan flavanon dan mempunyai gugus hidroksi pada atom C-3, C-3’, dan C4’. Uji aktivitas antioksidan menunjukkan bahwa isolat dapat menangkap radikal bebas 1,1’-diphenyl-1-picrylhydrazyl (DPPH) sebesar 21,59 % pada konsentrasi 50 ppm.

IDENTIFIKASI SERTA UJI AKTIVITAS ANTIBAKTERI SENYAWA FLAVONOID EKSTRAK DAUN SRIKAYA (Annona squamosa Linn) I M. D. Swantara; P. A. Damayanti; I W. Suirta
Jurnal Kimia (Journal of Chemistry) Vol. 16, No.1, Januari 2022
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 | DOI: 10.24843/JCHEM.2022.v16.i01.p06

Salah satu tanaman yang memiliki kandungan senyawa flavonoid yang sering dimanfaatkan sebagai obat tradisional di Indonesia adalah tanaman srikaya (Annona squamosa Linn). Isolasi, identifikasi serta uji aktivitas antibakteri senyawa flavonoid dari ekstrak daun srikaya terhadap bakteri Staphylococcus aureus dan Escherichia coli dengan metode sumur difusi telah dilakukan pada penelitian ini. Serbuk daun srikaya dengan kadar air 8% dimaserasi menggunakan metanol lalu dievaporasi hingga diperoleh ekstrak kental 113,85 g. Ekstrak tersebut dipartisi dengan pelarut n-heksana, etil asetat dan n-butanol yang menghasilkan 3,43 gram ekstrak n-heksana, 2,30 g ekstrak etil asetat dan 3,85 g ekstrak n-butanol. Uji fitokimia menunjukkan bahwa ekstrak etil asetat positif mengandung flavonoid dengan kadar total flavonoid terbanyak 26.117,4 mg QE/100 g. Isolat F5 hasil pemisahan serta pemurnian dari ekstrak etil asetat, positif mengandung flavonoid dan relatif murni secara kromatografi lapis tipis. Identifikasi isolat F5 dengan spektrofotometer UV-Visible dan Fourier-Transform Infrared (FTIR) menunjukkan dua pita serapan yaitu pada ? maks 376,40 nm (pita I) dan 256,40 nm (pita II) serta mengandung dugaan gugus fungsi yang terdapat dalam senyawa flavonoid yaitu OH, C=C aromatik, C-H alifatik, C-H aromatik, C-O eter dan C-O alkohol. Isolat tersebut mampu menghambat pertumbuhan bakteri Staphylococcus aureus dan Escherichia coli pada konsentrasi 15% (b/v) dengan diameter hambat secara berturut-turut sebesar 7,75 mm dan 7,25 mm. Hasil ini menunjukkan bahwa senyawa flavonoid hasil isolasi dari ekstrak daun srikaya diduga adalah 5,3’,4’-trihidroksiflavonol dan mempunyai aktivitas antibakteri dengan daya hambat sedang. Kata kunci: antibakteri, daun srikaya (Annona squamosa Linn), isolasi flavonoid, 5,3’,4’-trihidroksiflavonol. One of the plants containing flavonoid compounds, commonly used as traditional medicine in Indonesia, is srikaya (Annona squamosa Linn). Isolation, identification and antibacterial activity test of flavonoid compounds from srikaya leaf extract against Staphylococcus aureus and Escherichia coli by using diffusion well method have been done in this research. Srikaya leaf powder with 8% moisture content was macerated with methanol then evaporated until concentrated extract of 113.85 grams was obtained. The extract was partitioned with n-hexane, ethyl acetate and n-butanol solvents and produced 3.43 grams of n-hexane extract, 2.30 grams of ethyl acetate extract and 3.85 grams of n-butanol extract. The phytochemical test showed that the ethyl acetate extract positively contained flavonoids with the highest total flavonoid levels of 26,117.4 mg QE/100 grams. Isolate F5, as the result of separation and purification of ethyl acetate extract, was positive containing flavonoids and resulting relatively pure isolate, analyzed by thin layer chromatography. Identification of isolate F5 using spectrophotometer UV-Visible and Fourier-Transform Infrared (FTIR) showed two absorption bands at ? max of 376.40 nm (band I) and 256.40 nm (band II) as well as contained functional groups of flavonoid which was OH, C=C aromatic, C-H aliphatic, C-H aromatic, C-O ether and C-O alcohol. These isolates were able to inhibit the growth of Staphylococcus aureus and Escherichia coli at the concentration of 15% (w/v) with inhibitory diameter of 7.75 and 7.25 mm, respectively. These results indicated that flavonoids isolated from srikaya leaf extract were suspected 5,3’,4’-trihydroxyflavonol and had antibacterial activity with moderate inhibitory ability. Keywords: antibacterial, flavonoid isolation, srikaya leaf (Annona squamosa Linn),5,3’,4'-trihydroxyflavonol.

SINTESIS SENYAWA orto-FENILAZO-2-NAFTOL SEBAGAI INDIKATOR DALAM TITRASI I W. Suirta
Jurnal Kimia (Journal of Chemistry) Vol. 4, No. 1 Januari 2010
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 (668.165 KB)

Synthesis of o-fenilazo-2-naphtol used as indicator in titration has been conducted in this research. Thesynthesis was carried out by coupling of diazonium chloride salt with 2-naphtol, and aniline. The product wascharacterized using spectroscopy techniques (IR, 1HNMR, and MS), while the pKHIn was determined using UV-visspectrometer. The application of the product as indicator in titration was compared to methyl-orange.The synthesis gave a red crystal with 62.51 % yield. Infra red spectra analysis showed the presence ofcharacteristic functional groups such as–OH, CH-aromatic, C=C, N=N, CN, CO, and a peak indicated substituents atortho position. 1HNMR showed three separated peaks. Mass spectra gave molecular ion peak (M+) at m/z 248. Thered crystal obtained melted at 128-131oC. Based on spectroscopy analysis and melting point, it can be concludedthat the product was o-fenilazo-2-naphtol. The product had a pKHin of 3.16, therefore it can be used as indicator foracid-base titration which showed equivalent point at pH 5.

IDENTIFIKASI SENYAWA TOKSIK EKSTRAK KLOROFORM KULIT BIJI NYAMPLUNG (Calophyllum inophyllum L.) Sri Rahayu Santi; I Wayan Suirta; Kadek Agus Andika Pratama
Jurnal Kimia (Journal of Chemistry) Vol. 6, No. 2 Juli 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 (114.014 KB)

Identification of active toxic compounds from chloroform extract Nyamplung skin bean (Calophyllum inophyllum L) have been conducted. As much as 2,85 g n-hexane extract, 7,42 chloroform extract, and 4,71 water extract were resulted from 1 kg Nyamplung skin bean. Separation of 2 g chloroform extract using column chromatography (stationary phase: silica gel 60 and mobile phase chloroform-methanol 9,5:0,5) resulted in four fraction with yellowish fraction (0,473 g) as the most toxic fraction (LC50 8,241 ppm). Identification using GC-MS showed that the isolate was hexadecanoic acid (21,02%), 8-octadecenoic acid (59,55%), and oktadecanoic acid(19,43%).

PREPARASI BIODIESEL DARI MINYAK JELANTAH KELAPA SAWIT I W. Suirta
Jurnal Kimia (Journal of Chemistry) Vol. 3, No. 1 Januari 2009
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 (185.49 KB)

Synthesis of biodiesel from used cooking oil was carried out in two step reactions i.e esterification andtransesterification. The biodiesel obtained was analysed using gas chromatography and mass spectrometer (GC-MS).The quality was determined by comparing its physico chemical properties and compared to the Jerman Standard DINV 51606.The result of GC-MS showed 6 peaks coresponding to six methyl ester(biodiesel): methyl myristate, methylpalmitate, methyl linoleate, methyl oleate, methyl stearat and methyl arachydate. The biodiesel obtained has a densityof (0,8976±0,0003 g/mL), viscosity of (4,53±0,0872 mm/s), acid value of (0,4238±0,0397 mg KOH/g, and iodnumber of (9,3354±0,0288 g iod/100 g sample). There properties were in a good agreement with the standard JermanDIN 51606.

SINTESIS POLIEUGENOL DARI EUGENOL DENGAN KATALIS ASAM NITRAT PEKAT DAN MEDIA NATRIUM KLORIDA I Wayan Suirta; Ni Luh Rustini; Taka Iqbal Prakasa
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 (455.507 KB)

Polyeugenol has been synthesized from eugenol by using nitric acid as a catalyst and sodium chloride medium. Eugenol was obtained from clove oil which was previously redestill. The synthesis was carried but by using nitric acid catalyst on sodium chloride medium and without sodium chloride. The ratio of nitric acid to eugenol as 4 : 1. Polymerization result was analyzed by using infrared spectroscopy. Its rendement and its characteristics were also.The yield with sodium chloride medium was 42,97 %, a reddish black gel with melting point of 114,6-150oC. The yield without sodium chloride medium was 47,77 %, a solid brick red with melting point of 87-89oC. The infrared spectroscopy result showed that on the polymerization with medium was unsuccessful because the still CH=CH2 group absorption at 995.27 cm-1 and C=C at 1635,89 cm-1 were still existed, whereas for the polymerization without medium, both absorptions were absent.

Co-Authors Ali Sabikin Anak Agung Sagung Krisna Darmawati Dewa Ken Budiputra Dewi Novita Hardaningsih Dewi, Ni Made Diah Puspita Dwiyanti, D. A. B. E. P. Siregar E. Sahara Hermayani Sadi, Nina I Gede Tangkas Mei Yasa I Gusti Agung Gede Bawa I Gusti Ayu Kunti Sri Panca Dewi I K. G. H. Subawa I Made Dira Swantara I Made Oka Adi Parwata I Putu Eka Suwita Hegara I Wayan Sumarjaya I. A. Gede Widihati I. A. R. A. Asih I. A. R. Astiti Asih I.A.R.A. Asih Ida Bagus Putra Manuaba Kadek Agus Andika Pratama Ketut Gede Dharma Putra Ketut Ratnayani Komang Ardipa Saputra Lestari Lestari Made Arsa Minanti Arna Ekawati N. K. Gumiati N. W. Bogoriani Nasution, Dina Munawaroh Ni Komang Ariati Ni Luh Putu Kartika Mardiani Ni Luh Putu Mega Wahyuni Ni Luh Putu Putri Setianingsih Ni Luh Rustini Ni Made Puspawati P. A. Damayanti P. Suarya Putu Prisanti Putri Utami Putu Suarya S.R. Santi Saeful Bahri Sri Rahayu Santi Sri Wahjuni Taka Iqbal Prakasa W.S. Rita WAHYU DWIDJANI S Wasudewa, K. M. Wasudewa, Kresna Murti WIWIK SUSANAH RITA

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