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All Journal Jurnal Penelitian Saintek Jurnal Sains Dasar Indonesian Journal of Chemistry Indonesian Journal of Chemistry and Environment
Sunarto Sunarto
Universitas Negeri Yogyakarta
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Education Materials Science & Nanotechnology

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THIN COCONUT COMMOMOGRAPHY FOR DETERMINATION OF HEARTIDINE IN ORANGE OF ORANGE FROM ORANGE Sri Handayani; Sunarto Sunarto; Susila Kristianingrum
Jurnal Penelitian Saintek Vol 10, No 1: April 2005
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7251.364 KB) | DOI: 10.21831/jps.v10i1.5546

Abstract

This   research   with   the   title   Thin   Layer   Chromatography  for Determination of Hesperidins Content in Orange Peel has been done in organic chemistry laboratory. The aim of this research is to select the solvent mix for  the best hesperidins standard peak result and to determinate the content (in relative percentage) of some orange peel. Hesperidins isolation from  orange peel conduct by soaks the orange peel piece  in f 0% Calcium hydroxide solution for  a night in room temperature.    The   mixture   than  jiltered    and   neutralized   with hydrochloric acid to obtain hesperidins contain filtrate.  Hesperidins analyzed   by   thin   layer   chromatography.    Characterization   of hesperidins did by compare the sample chromatogram with standard chromatogram.  The yield  (in  relative  percentage)   determinate  by  compare the sample peak area with hesperidins standard peak area. The solvent  mix  selected  before  by  attempt  some  solvent  mix for eludate hesperidins standard solution. The result of this research shown that hesperidins can analyzed using thin   layer   chromatography   method.   with   the   best  solvent   was chloroform:  methanol mixture (2 : 3). Hesperidins content in extract solution of some strain orange peel  is; Baby Egypt 0, f 380%, Baby Pacitan 0,0615%, Mandarin Lokam 0,0018%, Santang 0,0049%, and Sunkist  Nevel 0,0360%.  The hesperidins  content  in orange peel  of Mandarin Pakistan, Medan super, Nipis, Sunkist,  Peras, and Purut was 0,0000. The hesperidins content in these orange peel was too low to be detected
Pemisahan Ion Logam Besi dan Mangan pada Air Sumur (Dalam) Wonoboyo Menggunakan Metode Kolom Adsorpsi Sunarto Sunarto; Suyanta Suyanta; Regina Tutik Padmaningrum; Isana Supiah YL; Karlinda Karlinda
Jurnal Sains Dasar Vol 11, No 1 (2022): April 2022
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jsd.v11i1.44189

Abstract

Penelitian ini bertujuan untuk memisahkan ion logam besi dan mangan pada air sumur (dalam) menggunakan metode adsorpsi kolom. Berdasarkan penelitian, diketahui efektivitas metode adsorpsi kolom untuk penurunan kadar logam besi dan mangan pada air sumur, efisiensi waktu penjerapan terhadap ion logam besi dan mangan, serta kondisi air sumur sebelum dan sesudah adsorpsi. Penelitian dilakukan pada air sumur (dalam) Wonoboyo, Kecamatan Jogonalan, Kabupaten Klaten. Proses adsorpsi menggunakan kolom berisi zeolit dan karbon aktif sebagai adsorben. Pada penelitian ini efektivitas pemisahan logam besi dan mangan dari air sumur (dalam) diketahui dari nilai efisiensi penjerapannya. Analisis logam besi dan mangan dilakukan dengan Spektrofotometri Serapan Atom (AAS). Selain itu juga dilakukan uji parameter air yaitu pH dan TDS. Hasil penelitian menunjukkan bahwa semakin lama proses adsorpsi, maka efektivitas adsorben zeolit dan arang aktif dalam menurunkan kadar Fe dan Mn meningkat. Efisiensi penjerapan cukup tinggi dengan rata-rata 97,50% untuk Fe dan 98,33% untuk Mn. Air yang sebelumnya keruh menjadi jernih dengan pH dan TDS yang semakin kecil, sehingga air lebih aman dikonsumsi karena semakin jauh dari nilai ambang batas yang ditetapkan dalam SNI dan permenkes RI N0.492/MENKES/PER/IV/2010.
Development of Voltammetry Analysis Method of Copper Metal Ions by Solid-State Membrane with Carbon Nanotube Suyanta Suyanta; Sunarto Sunarto; Regina Tutik Padmaningrum; Karlinda Karlinda; Illyas Md. Isa; Rahadian Rahadian
Indonesian Journal of Chemistry Vol 21, No 2 (2021)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.55056

Abstract

This study was aimed to develop a method for metal analysis in continuous integration using voltammetry techniques. The research subject was copper(II) ions. The objects of research were linearity, scan rate, repeatability of readings, and the presence of Cu(II) levels in well water samples. In this study, a selective electrode was developed with a solid membrane voltammetry system using differential pulse voltammetry measurement. The results showed the regression line of voltammetry method, y = 10.265 ln (x) + 330.47, with a correlation value of 0.9654, the optimum scan rate was 10 mV/s, and within five repetitions of each measurement for one electrode, it showed good repeatability. Meanwhile, the result of regression with the UV-Vis spectrophotometric method for Cu(II) was y = 0.12386x + 0.00879 with a correlation value of 0.9943. The voltammetry method was found to be much better than the UV-Vis method because it was able to be used for analysis up to a concentration of 6.35 × 10–4 ppm (or 1.00 × 10–11 M), while the UV-Vis method was only able to analyze up to 1.5 ppm (or 2.36 × 10–5 M).
Utilization of Coffee Waste as Active Charcoal For Purification of Waste Cooking Oil Salma Husna Sukmawati; Sunarto Sunarto
Indonesian Journal of Chemistry and Environment Vol 3, No 2 (2020): DECEMBER 2020
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (635.979 KB) | DOI: 10.21831/ijce.v3i2.43510

Abstract

This research aims to find the comparison of the chemical-physical characters of coffee waste activated charcoal using ZnCl2 with HCl, to calculate the highest adsorption efficiency, and to determine the quality of waste cooking oil after purification. The washed and dried of coffee waste are carbonized by the temperature 700oC and chemically activated using ZnCl2 5% and HCl 5%. The adsorption process used by batch system. The object of this research is the character of activated charcoal from coffee waste such as water content, ash content, iodine adsorption capacity of activated charcoal, peroxide number and free fatty acid (FFA) number of waste cooking oil before and after purification. Morphological analysis of activated charcoal was carried out using Scanning Electron Microscope (SEM). Analysis of the number of peroxide and FFA were carried out respectively using the titration method. The results of the characterization of activated charcoal showed that the activated charcoal with ZnCl2 5% activator had a water content of 6.55%, an ash content of 6.046%, adsorption of iodine 1039.5 mg/g, and had clean and wide pores. Activated charcoal with HCl 5% activator has a water content of 7.25%, an ash content of 7.55%, and 1008 mg/g of iodine adsorption. The highest adsorption efficiency of activated charcoal was 49.9749% in reducing the peroxide number and 50.1113% for reducing FFA, these results were obtained at 3 hours contact time with 3 g adsorbent mass. The peroxide number in the waste cooking oil that has been purified has not qualitified the standard SNI 01-3741-2013, but the FFA at 3 hours contact time with 3 g adsorbent mass qualitified the standard
Treatment of Industrial Wastewater and Household Waste Using Electrocoagulation Method with Aluminum Electrode S. Suyanta; S. Sunarto; Susila Kristianingrum; Regina Tutik Padmaningrum; Derifasay Salsabilla; K. Karlinda
Indonesian Journal of Chemistry and Environment Vol 5, No 2 (2022): DECEMBER 2022
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijoce.v5i2.58394

Abstract

The treatment of industrial wastewater and household waste using the electrocoagulation method with aluminum electrodes aims to determine the optimal time and voltage to reduce iron content, manganese content, and TDS from industrial wastewater and household waste. The method used in this study was the electrocoagulation method with aluminum electrodes. The object of this research was the reduction of iron content, manganese content and TDS of industrial wastewater and household waste. The optimization test of electric voltage and electrocoagulation time was carried out at variations of electric voltage of 5, 10, and 15 volts and time variations of 1, 3, 6, 9, and 12 hours. Then the samples were analyzed using Atomic Absorption Spectroscopy (AAS), pH meter and TDS meter. The results showed that the optimal time and voltage to reduce iron content, manganese content, and TDS of industrial wastewater and household waste was 12 hours and 15 volts. After the electrocoagulation process, the iron content was reduced by 95.37%, the manganese content was reduced by 100%, the TDS value was reduced by 43.66%, and the pH value increased by 26.73%.
Co-Authors Derifasay Salsabilla Illyas Md. Isa Isana Supiah Yosephine Louise K. Karlinda Karlinda Karlinda Karlinda Karlinda Rahadian Zainul Regina Tutik Padmaningrum Salma Husna Sukmawati Sri Handayani Susila Kristianingrum Suyanta Suyanta