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All Journal Jurnal Penelitian Saintek EKSAKTA: Journal of Sciences and Data Analysis JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya INOVTEK POLBENG IJCER (International Journal of Chemistry Education Research) Indonesian Journal of Chemical Analysis (IJCA) JEDCHEM (JOURNAL EDUCATION AND CHEMISTRY) Specta Journal of Technology Refleksi Pembelajaran Inovatif Khazanah: Jurnal Mahasiswa Jurnal Akademika Kimia Jurnal Akademika Kimia
Thorikul Huda
Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Islam Indonesia
Religion Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences

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Journal : EKSAKTA: Journal of Sciences and Data Analysis

 1 
Evaluasi Unjuk Kerja Alat Spektrofotometer UV-Vis Menggunakan Holmium Oksida dan Kalium Dikromat Thorikul Huda; Cecep Sa'bana Rahmatillah; Yusuf Habibi
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 12, ISSUE 1, February 2011
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

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Abstract

The Evaluation of Hitachi U 2010 UV-Vis Spectrophometer performance using holmium glass  from  Starna  reference materials  and  potassium  dichromate  has  been  done.    The  aim  of investigation with holmium glass was to known wavelength work region at ultra violet and visible area,  potassium  dichromate  solution  used  to  known  photometric  performance  of  UV-Vis spectrophotometer.   The  result of  investigation used holmium glass showed wavelength peak at 241,  278,  287,  333,  360,  418,  445,  453, 459,  536  and  637  nm  regions, wich  it  is  similar with reference material.  The determination of photometric resulted by absorbance value measurement at  235,  275,  313  and  350  nm  were  0,746;  0,860;  0,294;  0,641  respectively.      The  result  of wavelength  and  photometric  investigation  showed  that Hitachi U  2010  spectrophotometer was proper to done and suitable with SR 03 KAN reference.  Keywords:  UV-Vis  Spectrophometer,  holmium  glass,  potassium  dichromate,  wavelength,
Pengaruh Pola Agitasi pada Reaksi Transesterifikasi Minyak Jelantah Warung Pecel Lele Menggunakan Katalis Kitosan Tatang Shabur Juliantoa, Thorikul Huda
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 13, ISSUE 1-2, August 2013
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/eksakta.vol13.iss1-2.art4

Abstract

Effect of agitation on the transesterification reaction of waste cooking oil from pecel lele food stalls around UII campus using chitosan catalyst. Transesterification reaction was done by adding 46 grams of chitosan and 123 mL metanol tothe reactor. The mixture was stirred for 30 minutes to distribute methanol into chitosan. Furthermore,500 mL (460 grams) of cooking oil (= 0.916 g / mL) was add into reactor and agitated at 65oC within two hours using 30 rpm speed . Agitation was performed with several variations of the direction of stirring , one way stirring, stirring 2 ways round the turn at intervals of 5, 10 and 15 minutes. The results show that only 49,95% methyl ester yieldwas obtained (methyl palmitate, methyl-9-octadecenoate , methyl-3-oxooctadecanoate), produced by one directional rotation. Two ways agitation gives methyl ester results on average by 30.41 % . The number of methyl ester was decreased when treated with two way stirring well in intervals of 5 seconds (30.34 %) , 10 seconds (29.97 %) and 15 seconds (30.94 %). Methyl ester product was only sligtly, presumably because the raw material is very bad used cooking oil. It can be indicated from thehigh acid number 8.11 mg/L. and the number of chemical components in addition to triglycerides which may interfere with or hinder the contact between the reactants (chitosan , methanol and triglycerides).Keywords: used cooking oil, chitosan, agitation, transesterification, methyl ester
Co-Authors Abrari Noor Hasmi Alamsyah Alamsyah Cecep Sa'bana Rahmatillah Devita Wijiyanti Dwiarso Rubiyanto Efrizal Gozali, M Efrizal Gozali, M Indriani, Nita Indriani, Nita Is Fatimah Kuntari Kuntari Kurniyawan Kurniyawan Muhammad Budi Prasetyo Popi Yuliana Rini Rahayu Riyanto Riyanto Samsu Dlukha N Septian Perwira Yudha Tantri Kurnia Yulitaningtyas Tri Esti Purbaningtias Ukhti Luthfiyah Yuli Rohyami Yuli Rohyami Yusuf Habibi Zulfa Afifah