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INDONESIA
CHEMISTRY PROGRESS
Published by Universitas Sam Ratulangi
ISSN : 19795920     EISSN : 27158365     DOI : -
Core Subject : Science,
Chemistry
Majalah Ilmiah Chemistry Progress merupakan media untuk menyebarkan informasi ilmiah dan sarana komunikasi bagi para ilmuan dan cendekiawan melalui tulisan-tulisan ilmiah. Majalah Ilmiah Chemistry Progress terbit dua nomor dalam satu tahun (Mei dan November) berisi kajian penelitian dalam lingkup ilmu kimia (organik, anorganik, analitik, biokimia, fisika, bahan alam, lingkungan, pangan, kelautan, pertambangan, farmasi dan komputasi). Jumlah halaman pervolume adalah 55-65 halaman.
Arjuna Subject : -
Articles 275 Documents
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SINTESIS FOTOKATALIS NANOPARTIKEL ZNO UNTUK MENDEGRADASI ZAT WARNA METHYLENE BLUE Raganata, Tirza C.; Aritonang, Henry; Suryanto, Edi
CHEMISTRY PROGRESS Vol 12, No 2 (2019)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.12.2.2019.27923

Abstract

ABSTRAKTelah dilakukan penelitian tentang fotokatalis metilen biru menggunakan nanopartikel ZnO yang disentisis dengan metode kopresipitasi. Kemampuan fotokatalis dilakukan terhadap zat warna methylene blue 5 ppm menggunakan fotokatalis ZnO yang disinari sinar UV-A selama 30, 60, 120, 150, dan 180 menit. Penentuan konsentrasi dihitung berdasarkan absorbansi yang didapatkan dari hasil Spektrofotometri UV-Vis dan dalam rumus menghitung % degradasi. Hasil penelitian menunjukkan bahwa yang memiliki kemampuan fotokatalis paling baik adalah Nanopartikel ZnO 10% yaitu dengan nilai persen degradasi untuk variasi waktu penyinaran 30 menit adalah sebesar 51,82%, 60 menit sebesar 65,26%, 120 menit sebesar 71,25%, 150 menit sebesar 75,78%, dan 180 menit sebesar 71,01%. Dan waktu penyinaran optimum terjadi pada waktu kontak 150 menit. ABSTRACTA research on photocatalysts of methylene blue using ZnO nanoparticles were analyzed using coprecipitation method. The ability of photocatalysts was carried out on 5 ppm methylene blue dyes using ZnO photocatalysts which were exposed to UV-A rays for 30, 60, 120, 150, and 180 minutes. Determination of concentration was calculated based on the absorbance obtained from the results of the UV-Vis Spectrophotometry test reading and in the formula to calculate% degradation. The results showed that the best photocatalysts ability was ZnO 10% nanoparticles, ie the percent degradation value for 30 minutes irradiation time variation was 51.82%, 60 minutes was 65.26%, 120 minutes was 71.25%, 150 minutes at 75.78%, and 180 minutes at 71.01%. And the optimum exposure time occurs at 150 minutes contact time. 
PEMANFAATAN ZEOLIT TERAKTIVASI SEBAGAI BAHAN AKTIF SENSOR POTENSIOMETRI ION SULFAT Fardiyah, Qonitah; ., Atikah; Dwi N., Rivaatun Dwi N
CHEMISTRY PROGRESS Vol 7, No 2 (2014)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.7.2.2014.7471

Abstract

The purpose of this study was to determine the composition of the membrane and soaking time optimum character of the sensor resulting in a Nernstian potentiometric sulfate ions. Soaking the membrane is done in a solution of 0.4 M K2SO4 at 10, 20, 30, 40, 50, 60, 70, and 80 minutes. Basic characterization of potentiometric sensors sulfate ions was studied: the Nernst factor, linear concentration range, detection limit, response time and life time. The results showed that the composition of sulfate ion potentiometric sensor membranes obtained at the optimum composition of zeolites: active carbon:PVC: DOP = 49:3:16:32 (% w/w), the optimum soaking time membrane obtained at 30 minutes. Sulfate ion potentiometric sensor showed a linear response to theconcentration of sulfate ions in the range of 10-5 M to 10-1 M , the Nernst factor prices 29,17 mV / decade of concentration, the detection limit of 4.27 x 10-6 M or equal to 0.410 ppm sulfate, response time of 70 seconds and a service life of 41 days.Tujuan penelitian ini adalah untuk menentukan komposisi membran dan waktu perendaman yang optimum sehingga menghasilkan karakter sensor potensiometri ion sulfat yang Nernstian. Perendaman membran dilakukan dalam larutan K2SO4 0,4 M pada 10, 20, 30, 40, 50, 60, 70, dan 80 menit. Karakterisasi dasar sensor potensiometri ion sulfat yang diteliti: faktor Nernst, kisaran konsentrasi linear, batas deteksi, waktu respon dan usia pemakaian. Hasil penelitian menunjukkan bahwa komposisi membran sensor potensiometri ion sulfatoptimum diperoleh pada komposisi zeolit : karbon aktif: PVC : DOP = 49 : 3 : 16 : 32 (% b/b), waktu perendaman membran optimum diperoleh pada 30 menit. Sensor potensiometri ion sulfat menunjukkan respon linier terhadap ion sulfat pada kisaran konsentrasi 10-5 M hingga 10-1 M, harga Faktor Nernst 29,17mV/dekade konsentrasi, batas deteksi 4,27 x 10-6 M atau setara dengan 0,410 ppm sulfat, waktu respon 70 detik dan usia pemakaian 41 hari.
PRODUKSI GAS KARBON DIOKSIDA SELAMA PROSES BIOREMEDIASI LIMBAH HEAVY OIL DENGAN TEKNIK LANDFARMING Charlena, Charlena; Mas?ud, Zainal Alim; Anas, Iswandi; Setiadi, Yadi; Yani, Moh.
CHEMISTRY PROGRESS Vol 3, No 1 (2010)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.3.1.2010.66

Abstract

Bioremediation is defined as biological degradation process of organic or inorganic wastes in a controlledcondition to control and reduce their amount in the environment. In this study, the soil which had been polutedby heavy petroleum oil fractions, i.e. heavy oil waste (HOW), was used as sample. The bioremediationtechnique used in this study is an ex-situ technique. This study was conducted to determine the amount ofproduced CO2 gas during the HOW degaradation process. Treatment of heavy oil waste with biostimulation andbioaugmentation. Production of CO2 gas were placed in impiger and analysis with titrimetry method. The highestCO2 production mean was obtained from the bioaugmentation treatment with compost adding, i.e. 244,5 mg/m3.Generally, graphs CO2 gas production followed a similar sinusoidal pattern. From these results it can beinfered that the degradation process of HOW happened during the treatments in aerobic condition.
SKRINING FITOKIMIA DAN AKTIVITAS ANTIOKSIDAN EKSTRAK METANOL KULIT BATANG SOYOGIK (SAURAUIA BRACTEOSA DC) Mailuhu, Marlyne; Runtuwene, Max; Koleangan, Harry
CHEMISTRY PROGRESS Vol 10, No 1 (2017)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.10.1.2017.27967

Abstract

This study aims to known the potential contained in the bark extract Soyogik (Saurauia bracteosa DC) to determine antioxidant activity using DPPH (1,1-diphenyl-2-picrylhidrazyl). Beginning with a maceration process using methanol, then evaporated at 40°C and produce a viscous extract 35.775 g of 670 g of powder samples. Furthermore, the methanol extract was partitioned with n-hexane, ethyl acetate and distilled water. The antioxidant activity of three factions solvent immersion tested with DPPH radical in ethyl acetate fraction with IC50 value of 82.065 mg/mL followed by methanol extract, fractions distilled, and the fraction of n-hexane.ABSTRAK Penelitian ini bertujuan untuk mengetahui potensi yang terkandung pada ekstrak kulit batang Soyogik (Saurauia bracteosa DC) dan mengetahui aktivitas antioksidannya dengan menggunakan metode DPPH (1,1-diphenyl-2-picrylhidrazyl). Diawali dengan proses maserasi menggunakan pelarut metanol, kemudian dievaporasi pada suhu 40oC dan menghasilkan 35,775 g ekstrak kental dari 670 g serbuk sampel. Selanjutnya, ekstrak metanol dipartisi dengan pelarut n-heksana, etil asetat, dan aquades. Aktivitas antioksidan ketiga fraksi pelarut diuji dengan perendaman radikal DPPH pada fraksi etil asetat dengan nilai IC50 sebesar 82,065 ?g/mL diikuti dengan ekstrak metanol, fraksi aquades, dan fraksi n-heksana.
PERBANDINGAN KUALITAS KARBON AKTIF YANG DIBUAT DARI BATOK KELAPA HIBRIDA DAN BATOK KELAPA DALAM Tangkuman, Herling
CHEMISTRY PROGRESS Vol 2, No 2 (2009)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.2.2.2009.4969

Abstract

The objective of this research was to study active carbon quality from hybrid and deep coconut shell. Theparameter to analyze quality of active carbon were water content, ash content, volatile content, bondingcarbon content, Iodine value, and % tetrachloride. The results show that active carbon from deep coconutshell has the best quality in (CTC 54%, Iodine value 904, good granule and low solidity) Keywords : Quality, active carbon, hybrid coconut, deep coconut
POTENSI ANTIOKSIDAN DAN ANTIBAKTERI VIRGIN COCONUT OIL DARI TANAMAN KELAPA ASAL PAPUA Pulung, Maria; Yogaswara, Radite; Sianipar, Fajar Ria
CHEMISTRY PROGRESS Vol 9, No 2 (2016)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.9.2.2016.27992

Abstract

ABSTRAK Penelitian ini bertujuan untuk mengetahui potensi antioksidan dan antibakteri dari minyak kelapa asal Papua. Ekstrak minyak kelapa diperoleh dengan menggunakan metode fermentasi dan pemanasan. Aktivitas antioksidan dilakukan dengan metode DPPH sementara aktivitas antibakteri dengan metode sumuran. Hasil uji aktivitas antibakteri menunjukkan bahwa VCOP lebih baik menghambat pertumbuhan bakteri E.coli, sementara VCO fermentasi lebih baik dalam menghambat pertumbuhan bakteri S.aureus. Uji aktivitas antioksidan menunjukkan bahwa VCO yang diekstrak dengan menggunakan metode pemanasan (VCOP) sangat berpotensi sebagai antioksidan alami.ABSTRACT This research aims to determine the antioksidant and antibacterial potency of virgin coconut oil from Papua. Virgin coconut oil was extracted using fermentation and heated methods. The antibakteria potency was determined using sumuran method, while antioksidant was determined using scavenging DPPH method. Antibacterial activity showed that VCOP extract most inhibition the growth of E.coli, while the VCOF most inhibit the growth of S. aureus. The results showed that virgin coconut oil was extract using heated (VCOP) method most potent as antioksidant nature.
DETOKSIFIKASI SIANIDA PADA TAILING TAMBANG EMAS DENGAN NATRIUM METABISULFIT (Na2S2O5) DAN HIDROGEN PEROKSIDA (H2O2) Pitoi, Mariska Margaret; Wuntu, Audy D.; Koleangan, Harry S. J.
CHEMISTRY PROGRESS Vol 1, No 1 (2008)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.1.1.2008.23

Abstract

Experiments have been made to test the performance of Na2S2O5 and Cu’s method, H2O2’s method, and H2O2 and Cu’s method in cyanide detoxification in gold mining tailing with the varying theoretic concentration of the reagent was 100 %, 200 %, 300 %, 500 %, 750 %, and 1000 %. Tailing that used was taken from one of the people mining which used cyanide. It was treated with the three methods and six theoretic concentrations for four hours on magnetic stirrer. The result showed that Na2S2O5 and Cu’s method gave significant difference for CN free and CN WAD detoxification better than H2O2’s method and H2O2 and Cu’s method, whereas H2O2 and Cu’s method gave significant difference for CN free detoxification better than H2O2’s method but not for CN WAD detoxification. Theoretic concentration 750 % gave the best detoxification result but it was not have significant difference with 500 %, 300 %, and 200 % for CN free and 1000 %, 500 %, 300 %, and 200 % for CN WAD, so theoretic concentration 200 % was the economic considerations choice.
AKTIVITAS ANTIOKSIDAN EKSTRAK AIR DAN ETANOL DARI EMPELUR BATANG SAGU BARUK (Arenga microcarpha)AKTIVITAS ANTIOKSIDAN EKSTRAK AIR DAN ETANOL DARI EMPELUR BATANG SAGU BARUK (Arenga microcarpha) Ginting, Alvin Febryanto; Suryanto, Edi; Momuat, Lidya Irma
CHEMISTRY PROGRESS Vol 8, No 2 (2015)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.8.2.2015.13265

Abstract

The objective was to determined antioxidant activity of water and ethanol extracts from sago baruk trunk pith. After that, the extracts of trunk pith were analyzed total phenolic and condensed tannin content. Antioxidant activity of each extracts were evaluated using 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical at various concentrations (1-5 mg/ml). The extracts were identified its compounds group by spectrophotometry UV at 200-400 nm. This result showed that water extract (EA) has highest total phenolic content than ethanol extract 80%. The phenolic total content of EA and EE80 were 124.62; and 86.52 μg/mL, respectively. Whereas, ethanol extract 80% has condensed tannin no different with water extract. The condensed tannin total content of EE80 and EA were 39.911 and 39.74 μg/mL, respectively. Result was evaluation of DPPH free radical scavenging, ethanol extract 80% showed highest free radical scavenging activity than water extract. Result was IC50 calculation of EE80 and EA have IC50 value were 56.23 and 1949.84 μg/mL, respectively. UV spectra of phenolic compounds in the water and ethanol extracts exhibited a maximum absorbance at 275 nm and indication present in tannin condensed component. It was concluded that ethanol extract 80% having tannin condensed component and potential as antioxidantPenelitian ini bertujuan untuk menentukan aktivitas antioksidan ekstrak air dan ekstrak etanol dari empelur batang sagu baruk. Empelur batang sagu baruk diekstraksi dengan menggunakan pelarut air dan etanol. Setelah itu, setiap ekstrak dianalisis kandungan total fenolik dan tanin terkondensasi. Aktivitas antioksidan dari ekstrak empelur batang dievaluasi dengan radikal bebas 1,1-difenil-2-pikrilhidrazil (DPPH) pada berbagai konsentrasi (1-5 mg/mL). Ekstrak diidentifikasi golongan senyawanya dengan spektrofotometer UV-vis pada panjang gelombang 200-400 nm. Hasilnya menunjukkan bahwa ekstrak air (EA) memiliki kandungan total fenolik tertinggi daripada ekstrak etanol 80% (EE). Kandungan total fenolik EA dan EE berturut-turut adalah 150,31 dan 88,92 μg/mL sedangkan kandungan total tanin terkondensasi tidak menunjukkan perbedaan antara ekstrak air dan ekstrak etanol 80%. Kandungan total tanin terkondensasi EA dan EE berturut turut adalah 39,91 dan 39,74 μg/mL. Hasil pengujian aktivitas penangkal radikal bebas DPPH, ekstrak etanol menunjukkan penangkal radikal bebas DPPH yang lebih tinggi daripada ekstrak air. Hasil penghitungan IC50 untuk ekstrak etanol dan ekstrak air berturut-turut adalah 56,23 dan 1949,84 μg/mL. Spektra UV dari senyawa fenolik yang terdapat dalam ekstrak air dan atanol menunjukkan absorbansi maksimum pada 275 dan petunjuk adanya komponen tannin terkondensasi. Hasil penelitian ini menyimpulkan bahwa ekstrak etanol 80% memiliki tanin terkondensasi dan berpotensi sebagai antioksidan.
STRUKTUR POLIMER POLIBUTADIEN DAN TEKNIK PENGENDALIAN PRODUKSI Wibowo, Heri Budi
CHEMISTRY PROGRESS Vol 5, No 1 (2012)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.5.1.2012.652

Abstract

Wibowo, 2012. Struktur polimer polibutadien dan teknik pengendalian produksi. Hydroxy Terminated Polybutadien (HTPB) merupakan bahan kimia strategis sebagai bahan baku binderpropelan yang bagus. Upaya penguasaan teknik produksi HTPB sangat dibutuhkan dalam industri peroketannasional. Karakteristik HTPB terutama ditentukan oleh struktur polimer yang terbentuk, derajat kristalinitas,serta berat molekul rata-ratanya. Analisis yang menyeluruh terhadap komponen proses pembuatan polimerisasibutadien dalam rangka pembuatan HTPB diperlukan sebelum memilih proses mana yang paling baik dan cocokdigunakan. Parameter yang digunakan untuk memilih proses polimerisasi butadien adalah kemudahan proses,konversi hasil yang diperoleh, struktur yang memungkinkan diatur, kondisi operasi yang paling murah danmudah, serta ketersedian komponen bahan baku. Dengan demikian, maka struktur polimer yang diinginkandapat disesuaikan dengan kondisi proses yang harus diaplikasikan. Berdasarkan hasil penelaahan, makapolimerisasi radikal adalah paling menarik diaplikasikan. Selain struktur polimer bisa diatur, kondisi proses yangmurah, serta ketersediaan bahan baku di Indonesia yang tinggi.Kata kunci : HTPB, binder propelan, roketWibowo, 2012. Polymer structure of polybutadien and production handling technique. Hydroxy Terminated Polybutadiene (HTPB) is a strategic chemicals as raw material for a good propellant binderMastery of production techniques HTPB effort is needed in national rocketry industry. HTPB is mainlydetermined by the characteristics of the polymer structure is formed, the degree of crystallinity, and theaverages molecular weight. Thorough analysis of the components of the manufacturing process in order tomanufacture HTPB which is required before selecting the best and most suitable proccess. Parameters used toselect the polymerization process is the ease of process, conversion results obtained, a structure that allows theset, the operating conditions of the most inexpensive and easy, and availability of raw material components.Thus, the desired polymer structure can be adapted to the conditions that must be applied. Based on thereview, then the radical polymerization is the most interesting was applied. In addition to the polymer structurecan be regulated, low-cost process conditions, and availability of raw materials in Indonesia is high.Keywords : HTPB, a binder propellant, rocket
ANALISA PRODUKTIFITAS DAN LAJU DEKOMPOSISI SERASAH DAUN MANGROVE DI DESA BAHOI, KABUPATEN MINAHASA UTARA Patty, Wehelmina
CHEMISTRY PROGRESS Vol 3, No 2 (2010)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.3.2.2010.18986

Abstract

ABSTRACTPatty, W. 2010. Productivity Analysis and Litter Decomposition Rate Mangrove leaves in the Village Bahoi, North Minahasa Regency.Mangrove forest at Bahoi Village are still left under natural conditions, which are dominated by Sonneratia alba, Rhizophora apuculata and Bruguierra gymnorrhiza. The highest value of leaf decomposition rate found in R. apiculata (2 gr / week) and S. alba (1.75 gr / week). The leaves of S. alba species were decomposed most rapidly than R. apiculata. Analsysis productifity was based about 3 months data collections. Mean litter productivity is estimated ± 2.55 gram/m2/ day. A large amount of organic materials from the mangrove can transfer into the sea by tides currents. Nutrients such as nitrate and phosphor are released to the water from mangrove sediments as result of deposit of organic matter.Keywords: productivity, mangrove, Minahasa Utara Regency

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