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All Journal Jurnal Ilmiah Farmasi EKSAKTA: Journal of Sciences and Data Analysis Jurnal Ilmu Dasar Jurnal Sains dan Teknologi Indonesian Journal of Chemistry IJCER (International Journal of Chemistry Education Research) Akta Kimia Indonesia Indonesian Journal of Chemical Analysis (IJCA) Jurnal Teknik Kimia dan Lingkungan International Journal of Renewable Energy Development Jurnal Polimesin
Tri Esti Purbaningtias
Universitas Islam Indonesia
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology

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Improving Understanding of Application of ISO/IEC 17025 with the Role-Playing and Simulation Methods in Laboratory Management Tri Esti Purbaningtias; Thorikul Huda
IJCER (International Journal of Chemistry Education Research) VOLUME 1 ISSUE 1, AUGUST 2017
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcer.vol1.iss1.art1

Abstract

ABSTRACT: The application of role-playing learning with self-assessment had been done in the course of Laboratory Management. The application of role-playing learning with self-assessment has been done in the course of Laboratory Management. The learning of role-playing used the module scenario that has been developed based on the general requirements for the competence of testing laboratory and calibration laboratory as stipulated in SNI ISO / IEC 17025. The development of role-playing learning was done through three materials, the making of quality documents, internal audit, and management review, in which each student material will perform the role and proven by video. Self-assessment was based on the competency unit in SKKNI Field of Laboratory Testing Services MSL91600A Develop and maintain laboratory documents, MSL933002A Contribute to the achievement of quality objectives, MSL934002A Implement quality system and continuous improvement process, MSL936001A Maintain quality system and continuous improvement process in work environment, and MSL936002A Carry out internal audits of the quality system. The application of role-playing with self-assessment could give an influence to the improvement of student competency achievement in the competency unit. In class A, student's score of student's previous competency points 39.35% rose to 67.75% and class B rose from 46.51% to 68.95%. The application of role-playing in Laboratory Management could improve the learning outcomes, there is an increase in the number of students who get the value of A that is 13.04% rose to 27.42% while the number of students who got £ C decreased 7.22% i.e. from 21.74% to 14.52%. In addition, the application of role-playing method could improve the teaching performance of lecturer by students that is 3.43.Keywords: quality document, internal audit, management review, role-playing, self-assessment, ISO/IEC 17205 Received: 21 June 2017, Revised: 13 August 2017, Accepted: 2 September 2017
Use of Interactive Media In Biochemical Material Puji Kurniawati; Reni Banowati Istiningrum
IJCER (International Journal of Chemistry Education Research) VOLUME 1 ISSUE 1, AUGUST 2017
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcer.vol1.iss1.art6

Abstract

ABSTRACT: A study of the use of interactive media in Biochemistry materials at Chemical Analysis Department, Islamic University of Indonesia has been done. Interactive media used in this research is animation media based on molymod and Flash. Molymod is used in lecturing activities to explain the macromolecular bonds and structures that are the focus of the Biochemistry course while the Flash-based animation is expected to improve students' understanding of biochemical metabolism processes in the body. The purpose of this study is to increase students' interest in biochemical learning which is known to be difficult and unattractive.Stages of this research there are 6, namely the initial stage, pre-design, design, model evaluation, field application and evaluation of results. The initial stage is done by improving the Course Outline (CO) and Teaching Unit Course (SAP) as well as the creation of lecture modules. Contents, materials and display modules have been reviewed by incorporating elements of analysis of biochemical examples that are often performed in the industrial world. Molymods of small capacity per set can only make two interconnected monomers. Flash-based animation media can be used during college or can be opened by students independently. The use of interactive media can stimulate students' high interest and understanding, ie 74.38% and 72.88% respectively. The correlation relationship between understanding and interest is also high which is marked with correlation coefficient value 0.806. The achievement of value ≥ B / C obtained with interactive media equal to 76,57% and Lecturer Performance Value (NKD) equal to 3,56.Keywords: interactive media, molymod, biochemistryReceived: 22 June 2017, Revised: 13 August 2017, 1 September 2017
Perbandingan Metode Penentuan Kadar Permanganat dalam Air Kran Secara Titrimetri dan Spektrofotometri UV-Vis Puji Kurniawati; Hanik Alfanah
Indonesian Journal of Chemical Analysis (IJCA) Vol. 2 No. 2 (2019): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol2.iss2.art3

Abstract

Telah dilakukan perbandingan metode penentuan kadar permanganat dalam air kran secara titrimetri dan spektrofotometri UV-Vis. Perbandingan ini dilakukan yang bertujuan untuk membandingkan metode titrasi dengan spektrofotmetri untuk penentuan kadar permanganat serta dapat menentukan kadar permanganat dalam air kran secara titrasi dan  spektrofotometri UV-Vis. Absorbansi sampel air kran diukur dengan spektrofotometer UV-Vis pada panjang gelombang maksimum 526 nm dan nilai kadar permanganat dihitung berdasarkan absorbansi data dan setara mol asam oksalat dengan kalium permanganat. Hasil penelitian uji kuantitatif hasil yang diperoleh menunjukkan bahwa nilai kadar permanganat dengan metode titrasi  serbesar adalah 0,5724 mg/L dengan nilai % Recovery sebesar 93,19% sedangkan dengan metode spektrofotmetri diperoleh konsentrasi 0,1417 mg/L dengan % Recovery sebesar 88,40%. Hasil ini menunjukkan bahwa keduanya keduanya merupakan metode yang sama baik dalam menentukan nilai permanganat.Kata kunci : Permanganat, recovery, signifikan, titrimetri
Pengaruh Tahap Kristalisasi pada Sintesis ZSM-5 Mesopori dari Kaolin Alam Abdul Hamid; Didik Prasetyo; Tri Esti Purbaningtias; Faizatur Rohmah; Ike Dayi Febriana
Indonesian Journal of Chemical Analysis (IJCA) Vol. 3 No. 2 (2020): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol3.iss2.art1

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Pemanfaatan Batu Kapur Madura sebagai Katalis dalam Pembuatan Bioedesel dari Minyak Nyamplung Ike Dayi Febriana; Abdul Hamid; Amin Jakfar; Mohammad Abdullah; Faizatur Rohmah; Tri Esti Purbaningtias; Zeni Rahmawati; Septian Dwi Wijaya
Indonesian Journal of Chemical Analysis (IJCA) Vol. 5 No. 1 (2022): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol5.iss1.art2

Abstract

Pemanfaatan batu kapur dari Pamekasan, Madura sebagai katalis heterogen pada reaksi pembuatan biodiesel dipelajari pada penelitian ini.  Batu kapur dikalsinasi pada suhu 900 ºC selama 3 jam untuk membentuk katalis CaO. Katalis CaO yang terbentuk dikarakterisasi menggunakan difraksi sinar-X (XRD), spektroskopi inframerah (FTIR) dan Scanning Electron Microscopy-Energy Dispersive X-Ray Analysis (SEM-EDX). Proses transesterifikasi dari minyak nyamplung dilakukan dengan rasio mol minyak terhadap methanol sebesar 1:16 pada temperatur 60 °C selama 1 jam dengan katalis CaO sebesar 4 % (w/w). Hasil analisis GC-MS diperoleh yield biodiesel sebesar 54% dengan konversi sebesar 49%.
Estimasi Angka Ketidakpastian Asal Kalibrasi Instrumen Terhadap Pengujian Kualitas CPO Tri Esti Purbaningtias, M.Si.; Bayu Wiyantoko; Rudy Syahputra; Yorfan Ruwindya; Suci Miranda; Rofi'atun Nashriyah; Bagoes Wibowo
Indonesian Journal of Chemical Analysis (IJCA) Vol. 5 No. 2 (2022): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol5.iss2.art9

Abstract

Telah dilakukan kajian pengaruh kalibrasi peralatan pengujian moisture and impurities (M&I) dan deterioration of bleachability index (DOBI) pada crude palm oil (CPO). Kalibrasi berfokus pada neraca analitik dan spektrofotometer UV-Visibel sebagai bagian persyaratan dari sertifikasi Laboratorium Pengujian ISO/IEC 17025:2017. Penilaian kondisi neraca analitik berpedoman pada dua acuan yaitu Organisation Internationale De Métrologie Légale (OIML R 111-1 Edition 2004) dan The United States Pharmacopeial Convention (USP-41). Hasil kalibrasi neraca analitik Ohaus PA224 menggunakan anak timbangan kelas E2 (20-200 g) yang menghasilkan nilai koreksi kurang dari 0,1% dan sesuai persyaratan USP-41. Hasil kalibrasi neraca terhadap perhitungan ketidakpastian pengukuran moisture sangat kecil yaitu 0,0031% dan 0,0032% serta pengukuran impurities sebesar 0,00991% dan 0,01039%. Sementara kalibrasi spektrofotometer UV-Visibel didasarkan pada The United States Pharmacopeial Convention (USP-40) bagian 857 terkait Ultraviolet-Visible Spectroscopy menggunakanan bahan acuan tipe NIST neutral density standards. Hasil kalibrasi dengan nilai ketidakpastian (U95), k =2 untuk semua filter dan panjang gelombang sebesar 0,005-0,008 yang memiliki rata-rata sebesar 0,00545 yang memenuhi persyaratan absorbansi tidak melebihi ± 0,008. Hasil kalibrasi spektrofotometer UV-Visibel memberikan persentase nilai ketidakpastian analisis DOBI pada sampel CPO sebesar 2,3% untuk kedua sampel dimana hasil evaluasi ketidakpastian menunjukkan pengujian DOBI pada sampel CPO adalah baik karena memiliki nilai persentase ketidakpastian kurang dari 10%.
Evaluation of Ethanol Grade on the Robustness of Acid Number Determination in Fish Oil Purbaningtias, Tri Esti; Sandy
Indonesian Journal of Chemical Analysis (IJCA) Vol. 7 No. 2 (2024): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol7.iss2.art11

Abstract

The robustness evaluation of the acid number analysis method in fish oil was carried out to see the effect of the type of ethanol used as a solvent in the titration process. The types of ethanol used in this study were pro analysis grade, pharma and food grade, and technical grade. The acid number values (mgKOH/g) in fish oil with various solvents obtained were 2.3955±0.3211 for pro analysis grade; 2.7932±0.2983 for pharma and food grade; 2.7812±0.3362 for technical grade 1; 2.7031±0.3405 for technical grade 2. The acid number for all types of ethanol has a value that is in accordance with the requirements of SNI 8467: 2018 where the acid number value must be less than 3 mgKOH/g. However, if the measurement uncertainty value is included in the calculation, only the pro analysis grade ethanol solvent has an acid number value that is in accordance with the requirements of SNI. The results of the ANOVA test also showed that there was a significant difference in the variation of ethanol types for determining acid numbers because the calculated F value (13.9004) was greater than the F table (3.0984). Therefore, the solvent that must be used in the method of determining acid numbers in fish oil is pro analysis grade ethanol.
Synthesis of sodalite-natural dolomite as novel bifunctional catalyst for biodiesel production: Experimental study of performance and emissions on diesel engine Fatah, Misbakhul; Hamid, Abdul; Rahmawati, Zeni; Saiful, S.; Purbaningtias, Tri Esti; Jakfar, Amin
International Journal of Renewable Energy Development Vol 14, No 5 (2025): September 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.61434

Abstract

The development of catalysts derived from natural minerals was investigated in this study for biodiesel production due to their high catalytic activity, abundant availability, low production cost, and environmentally friendly. Biodiesel was produced from Calophyllum Inophyllum (CI) oil using bifunctional catalyst synthesized from natural dolomite and sodalite. In addition, an experimental study was conducted to evaluate the performance and emission characteristics of the produced biodiesel in a diesel engine. The natural dolomite catalyst contains a high composition of CaO-MgO, while sodalite, consisting of Si and Al precursors, was synthesized from natural kaolin. The bifunctional catalysts were synthesized via wet impregnation method with varying loadings of natural dolomite (5, 10, 15, 20, and 25 wt%). FTIR, XRD, SEM-EDX, and N2 adsorption-desorption analyses were employed to characterize the physicochemical properties of the catalysts. The optimum biodiesel yield of 94.14 % was obtained at dolomite loading of 25 wt%. Engine performance tests revealed that the B10 fuel blend produced maximum power and torque of 1.252 kW and 69.151 N.m, respectively, at 1250 rpm. While the optimum specific fuel consumption was obtained at 0.0004 Kg.HP/h at 1250 rpm for all fuel blends.The lowest CO emission was recorded for the B40 fuel blend at 414 ppm, while the lowest NO and NOx emissions were observed for the D100 fuel at 88 and 86 ppm, respectively.
PENGARUH WAKTU AGING PADA MODIFIKASI PORI ZEOLIT ALAM DENGAN CTABR purbaningtias, tri esti; Kurniawati, Puji; wiyantoko, bayu; prasetyoko, didik; suprapto, suprapto
JST (Jurnal Sains dan Teknologi) Vol. 6 No. 2 (2017)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (851.024 KB) | DOI: 10.23887/jstundiksha.v6i2.9322

Abstract

Penelitian bertujuan untuk melihat pengaruh waktu aging pada sintesis material mesopori. Material mesopori hasil sintesis dikarakterisasi dengan XRD, FTIR dan fisisorpsi nitrogen. Analisis XRD menunjukkan bahwa variasi waktu aging berpengaruh pada struktur mesopori dari zeolit alam (MZ). Spektrum FTIR menunjukkan adanya silanol dan siloksan pada sampel MZ dan MMZ. Hal ini membuktikan bahwa sampel MZ dan MMZ pada semua variasi waktu aging merupakan material kaya silika. Analisis fisisorpsi nitrogen memberi informasi bahwa penambahan waktu aging menyebabkan diameter pori yang lebih besar dan luas permukaan spesifik yang lebih kecil serta dibandingkan dengan bahan baku (zeolit alam, MZ) karena keterlibatan surfaktan kationik (CTABr) selama sintesis.
ADSORPSI FENOL DENGAN HIDROTALSIT Mg/Al 4:1 TERMODIFIKASI SODIUM DODECYLSULFATE (SDS) IN SITU DAN EX SITU Kurniawati, Puji; Wiyantoko, Bayu; Purbaningtias, Tri Esti
JST (Jurnal Sains dan Teknologi) Vol. 6 No. 1 (2017)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1096.715 KB) | DOI: 10.23887/jstundiksha.v6i1.9438

Abstract

Hidrotalsit (HT) telah disintesis dengan menggunakan Al(NO­3)3·9H2O dan Mg(NO­3)2·6H2O pada pH 10±0,5 dengan ratio molar Mg/Al adalah 4:1. Material tersebut dimodifikasi dengan Sodium Dodecylsulfate (SDS) dengan teknik sintesis ex situ dan in situ yang dinyatakan dengan HTDS ex situ  dan HTDS in situ. Hasil karakterisasi FTIR menunjukkan munculnya puncak spektra infrared yang tajam pada 2920, 2851 dan 1065 cm-1 yang menunjukkan adanya gugus metil, metilen dan –OSO3- pada HTDS. Karakterisasi XRD pada HT, HTDS ex situ dan HTDS in situ menunjukkan pola difraktogram yang khas untuk material hidrotalsit. Adsorpsi fenol berlangsung optimum pada pH 3, 5 dan 3 untuk HT, HTDS ex situ dan HTDS in situ. Ketiga adsorben juga mengikuti model kinetika adsorpsi pseudo orde dua dan model isoterm Langmuir. Kapasitas maksimum HT, HTDS ex situ dan HTDS in situ masing-masing adalah 27,55; 17,64 dan 29,94 mg/g.
Co-Authors Abdul Hamid Abdullah, Mohammad Aishah Abdul Jalil Amin Jakfar, S.T.,M.T., Lukman Hadiwijaya, S.T.,M.T. Arief Fadlan Armansyah, Muhammad Doni Auliana Diah Wilujeng Aurista Miftahatul Ilmah Bagoes Wibowo Bayu Wiyantoko Bayu Wiyantoko Bayu Wiyantoko Che Ku Nor Liana Che Ku Hitam Cicik Herlina Yulianti Didik Prasetyo Didik Prasetyoko Dini, Sekti Kartika Djoko Hartanto Djoko Hartanto Faizatur Rohmah Fatah, Misbakhul Febriana, Ike Dayi Fikri, Mohammad Anas Hamzah Fansuri Hanik Alfanah Hasliza Bahruji Ida Ayu Putu Sri Widnyani Ike Dayi Febriana Ike Dayi Febriana Imroatul Qoniah Jakfar, Amin Kurniawati, Puji Kurniawati, Puji Mardatillah, Wahidatun Miranda, Suci Mohammad Abdullah Mustika Kusuma Sari Mutiara Herawati, Mutiara Oktavia Indrati, Oktavia Puji Kurniawati Rahmadani, Yusi Rahmawati, Zeni Ratna Ediati Reni Banowati Istiningrum, Reni Banowati Rofi'atun Nashriyah ROHMAH, FAIZATUR Romadhonsyah, Fitra Rudy Syahputra Saiful, S. Sandy Septian Dwi Wijaya Sugeng Triwahyono Suprapto Suprapto Syafa, Muhammad Badrus Thorikul Huda tri wahyuni Wiyantoko, Bayu Wiyantoko, Bayu Yorfan Ruwindya Yoshifumi Chisaki Yusuf Muhammad Zein Zeni Rahmawati