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All Journal CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Jurnal Kimia (Journal of Chemistry) Ecotrophic, Journal of Environmental Science JURNAL PENDIDIKAN TAMBUSAI Jurnal Media Sains
Ketut Gede Dharma Putra
Magister Kimia Terapan, Program Pascasarjana, Universitas Udayana Jl..P.B. Sudirman Denpasar-Bali, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Electrical & Electronics Engineering Environmental Science Immunology & microbiology Medicine & Pharmacology Social Sciences

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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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (145.432 KB) | DOI: 10.24843/JCHEM.2017.v11.i02.p03

Abstract

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.
ADSORPSI DAN DESORPSI Cr(VI) PADA ADSORBEN BATU CADAS KARANGASEM HASIL LIMBAH KERAJINAN CANDI BALI TERAKTIVASI NaOH DAN TERSALUT Fe(OH)3 I Made Dupi Andika; I Nengah Simpen; Ketut Gede Dharma Putra
Jurnal Kimia (Journal of Chemistry) Vol. 10, No. 1 Januari 2016
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 (130.486 KB) | DOI: 10.24843/JCHEM.2016.v10.i01.p17

Abstract

This research discusses the adsorption-desorption of Cr(VI) by the adsorbent made from Karangasem cadas rock which is the waste of Balinese temple production. The adsorbent was activated with  NaOH and coated with Fe(OH)3. The aim of the study was to investigate the capability of cadas rock in Cr6+ adsorption. The rock was activated with various concentrations of NaOH followed by coating process with Fe(OH)3. Each adsorbent was characterized for its specific surface area and surface acidity. The equilibrium time, adsorption isotherms and adsorption capacity were also investigated. The adsorbent with the highest adsorption capacity was then desorbed using HNO3 2 mol/L, NaOH 1 mol/L, and saturated NH4Cl. The result suggested that the highest surface acidity was showed by the control adsorbent which was 0.2836 ± 0.0106 mmol/g with an acid site of 1.7079 x 1020 atoms/g. The highest spesific surface area was showed by the adsorbent activated with 6M NaOH  and coated with Fe(OH)3, which was 34.5042 m2/g. The highest adsorption capacity was showed by the same adsorbent, which was 2.5253 mg/g with interaction time of 15 minutes at pH 5. This met the pattern of Langmuir adsorption isotherm. HNO3 was the most effective desorption substance resulted in a percentage of Cr desorbed of 2,15%.
PENENTUAN KANDUNGAN LOGAM Pb DAN Cr PADA AIR DAN SEDIMEN DI SUNGAI AO DESA SAM SAM KABUPATEN TABANAN NI PUTU DIANTARIANI; K.G. DHARMA PUTRA
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 1 No 2
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (119.711 KB)

Abstract

Research on the heavy metal content, Pb and Cr in water and sediment of Ao River in Sam SamVillage, Tabanan Regency have been carried out. Sample of water taken at 8 location per week during 4weeks, while sample of sediment only taken once at 8 location. Determination of metal content of Pb and Crconducted using destruction method with mixture of HNO3 dan HCl (3:1) and analysed with AbsorptionAtomic Spectrophotometer.The result showed that mean metal content of Pb and Cr in water of Ao river at the location aftertextile industry (location 5 until 8) from four times intake of samples have passed enabled boundarythreshold that is 0,03 mg/L for Pb and 0,05 mg/L for Cr. Mean Pb content in sediment at location 1, 2, 3, 4and 5 still under natural content while location 6, 7 and 8 over the natural boundary threshold. Meanwhile forthe Cr metal only at location 8 over the natural boundary threshold. The highest metal content of Pb and Cr insediment and water found at location 8 that is each of 0,496 mg/L and 0,213 mg/L for Pb and Cr in water and141,844 mg/Kg and 33,489 mg/Kg for Pb and Cr in sediment respectively.
Kadar Etanol dan Asam Asetat pada Fermentasi Ketan Putih (Oryza Sativa l. Var Forma Glutinosa) dengan Saccharomyces Cerevisiae dan Ragi Pasaran Maryana, Himayari Nufus; Suaniti, Ni Made; Dharma Putra, Ketut Gede
Jurnal Pendidikan Tambusai Vol. 5 No. 3 (2021): 2021
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v5i3.2668

Abstract

Beras ketan putih (Oryza sativa L. var forma glutinosa) merupakan salah satu hasil pertanian di Indonesia yang dapat difermentasi menjadi etanol seperti tape menggunakan ragi (Saccharomyces cerevisiae). Penelitian ini bertujuan untuk membandingkan kadar etanol dan asam asetat dalam tape beras ketan putih menggunakan Saccharomyces cerevisiae murni dan ragi pasaran. Metode analisis kadar dan massa jenis etanol masing-masing menggunakan kromatografi gas dan piknometer serta asam asetat secara kovensional (titrasi). Kadar etanol rata-rata dalam tape beras ketan dengan Saccharomyces cerevisiae murni adalah 11,58 %v/v, dan ragi pasaran adalah 14,79 %v/v, dengan massa jenis dihasilkan 0,98 g/ml pada kedua sampel. Kadar asam asetat rata-rata hasil fermentasi dengan Saccharomyces cerevisiae murni dan ragi pasaran 0,06 %v/v dan 0,45 %v/v.
Co-Authors A. A. Bawa Putra Dewi Novita Hardaningsih I D. G. Putra Prabawa I Made Dupi Andika I Nengah Simpen I Wayan Gede Gunawan I Wayan Suirta Iryanti Eka Suprihatin Kadek Ayu Intan Sari Luh Pt Widya Kalifika Devi Luh Putu Widya Kalfika Devi M. M. Manurung Manuntun Manurung Maryana, Himayari Nufus Mirah Surya Dewi, Ni Putu Pande Ni Made Suaniti Ni Made Yunarsih Ni Putu Ayu Dwijayanti, Ni Putu Diantariani Ni Wayan Trisnadewi, Ni Wayan