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Ajuk Sapar
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Department of Chemistry, Faculty of Mathematics and Natural Sciences, Tanjungpura University Jl. Prof. Dr. Hadari Nawawi, Pontianak, Kalimantan Barat, Indonesia
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INDONESIA
Indonesian Journal of Pure and Applied Chemistry
Published by Universitas Tanjungpura
ISSN : 26208571     EISSN : 2620858X     DOI : -
Core Subject : Science,
Biochemistry, Genetics & Molecular Biology Chemistry
Indonesian Journal of Pure and Applied Chemistry (IJoPAC) was first established in 2018 as a scientific journal that accommodates researchers and education practitioners to publish scientific work and research results which are the results of experiments or literature studies in the field of chemistry. Publications are carried out periodically with three issues (January-April, May-August, September-December) in one volume per year. Published scientific work can be in the form of original articles, short communications and review results covering the fields of Physical chemistry, Organic chemistry, Analytical chemistry, Inorganic chemistry, Biochemistry / Biological Chemistry, Applied Chemistry. Focus and Scope of Indonesian Journal of Pure and Applied Chemistry covering the fields : Physical chemistry Organic chemistry Analytical chemistry Inorganic chemistry Biochemistry/Biological Chemistry Applied Chemistry
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 5 Documents
 1 
Search results for , issue "Vol 2, No 2 (2019)" : 5 Documents clear
PENGARUH PENAMBAHAN JENIS DAN KONSENTRASI PLASTICIZER TERHADAP KUALITAS BIOPLASTIK BERBASIS SELULOSA DARI TANDAN KOSONG KELAPA SAWIT Cindy Andahera; Isni Sholikhah; Deah Ayu Islamiati; Memik Dian Pusfitasari
Indonesian Journal of Pure and Applied Chemistry Vol 2, No 2 (2019)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (700.683 KB) | DOI: 10.26418/indonesian.v2i2.36901

Abstract

Plastic is a material that commonly used in daily activities. The increasing of using plastic can increase the amount of plastic waste that can give a negative impact on environment. One effort to solve the problem is by replacing plastic material with a material that convenient degraded by soil, that’s called bioplastic. Bioplastic has a biodegradable characteristic and it is 67% compostable. One of the raw material to producing bioplastic is cellulose. Cellulose can be found in non-food plants such as woods, because most of them contain 40-45% cellulose. Oil palm is the one of the plants which is the cellulose taken by utilize oil palm empty fruit bunch. On the other hand, plasticizer must be added for producing bioplastic to make plastic has elastic characteristic. Sorbitol, Glycerol, Oleic Acid are types of plasticizer. In this research, bioplastic is producing by using solution casting method by addition of plasticizer. With these methods indicates that by using sorbitol as plasticizer is more suitable than glycerol and oleic acid. By using 30% v/v sorbitol can get the optimum quality of bioplastic with 58,7% mass reduction using degradation-analysis during 4 days, and maximum attraction which can be detained is 6,27 kPa
UJI AKTIVITAS ANTIBAKTERI MINYAK ATSIRI DAUN JERUK SAMBAL (Citrus x hystryx) TERHADAP Escherichia coli DAN Staphylococcus aureus Yurisa Yurisa; Muhammad Agus Wibowo
Indonesian Journal of Pure and Applied Chemistry Vol 2, No 2 (2019)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2701.923 KB) | DOI: 10.26418/indonesian.v2i2.36905

Abstract

Essential oils of Jeruk Sambal leaves (Citrus x hystryx) have as antibacterial agents. This study aims to determine the antibacterial activity of dried Jeruk Sambal leaves originating from Sungai Kakap area against Escherichia coli and Staphylococcus aureus. Stages in this study were divided into two stages (1) isolation of volatile oil by steam distillation, (2) test the antibacterial activity by pitting diffusion method. Essential oil yield of 0.22% was obtained. The results of GC-MS analysis showed that the essential oil of Jeruk Sambal leaves dried has 4 main compounds, namely elemol (26.27%), β-eudesmol (14.47%), 2-β-pinene (13.84%) and linalool (7.77%). The test results showed that the antibacterial activity of essential oils of Jeruk Sambal leaves was more active in inhibiting the growth of S. aureus than E. coli bacteria.
UJI KELARUTAN LOGAM DARI TAILING TIMAH MENGGUNAKAN PELARUT EUTEKTIK BERBASIS KOLIN KLORIDA DAN ASAM p-TOLUENASULFONAT Nimas Ade Kusdayanti; Winda Rahmalia; Thamrin Usman
Indonesian Journal of Pure and Applied Chemistry Vol 2, No 2 (2019)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2571.673 KB) | DOI: 10.26418/indonesian.v2i2.36906

Abstract

Deep eutectic solvents (DES) are defined as combinations of two or three components which are able to establish hydrogen bond interactions with each other to form an eutectic mixture, that have a melting point lower than that of the each individual component. This study aims to determine the characteristics of DES based on choline chloride (ChCl) as quaternary ammonium salts and p-toluenasulfonic acid (PTSA) as hydrogen bond donors and to investigate their selectivity for dissolving metals in tin tailings. Synthesis of DES was carried out by mixing ChCl and PTSA with variations of the mole fraction, then stirring at 80 oC for 15 minutes. Resulted products were characterized their freezing point, density, viscosity, conductivity and functional groups. Mixture with a mole fraction of ChCl 0.6 formed homogeny clear liquid. It has a freezing point of 8 oC, density of 1.207 g/mL, viscosity of 4.663 cP, and conductivity of 182.4 mS/cm. Based on fourier transform infrared (FTIR) analysis, the interaction between ChCl and PTSA was due to the formation of hydrogen bonds between the O atoms of PTSA and the H atoms of ChCl. Inductively coupled plasma atomic emission spectroscopy (ICP-AES) analysis showed the presence of 1962 ppm of Fe metal dissolved in DES. This value was significant greater than the presence of other metals in the DES.
KARAKTERISASI MINYAK ATSIRI DAUN UJUNG ATAP (Baeckea Frutesces L) DARI HUTAN DESA SUNGAI NANJUNG KABUPATEN KETAPANG KALBAR M Supandi; Muhammad Agus Wibowo; Titin Anita Zahara
Indonesian Journal of Pure and Applied Chemistry Vol 2, No 2 (2019)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2821.916 KB) | DOI: 10.26418/indonesian.v2i2.36911

Abstract

Ujung atap (Baeckea frutescens L) from Myrtaceae family is a woody shrub which leaves resemble a large evergreen tree found from Nanjung River Village, Ketapang Regency, West Kalimantan.  The purpose of this study is to isolate and characterize essential oils of ujung atap. Insulation is used by the distillation method. The result showed rendement of ujung atap the essential oils are 0,91% (4 hours), 0,97% (6 hours) dan 1,12% (7 hours). Essential oils are tested physicochemistry properties and components of chemistry compound analyzed with GC-MS. The result showed density is 0,878 (room temperature), refractive index is 1,474 (28oC), optical rotation is +2,24(20oC), solubility in alcohol is 1:8 mL, acid number 1,253, dan ester number 3,829. The result of GC-MS showed 21 compound, with the main compound monoterpenes are α-pinene, β-pinene and 1,8 cineol.
SINTESIS DAN KARAKTERISASI GEOPOLIMER BERBAHAN DASAR KAOLIN CAPKALA DENGAN VARIASI RASIO MOL SiO2/Al2O3 Yatim Mustakim; Nurlina Nurlina; Intan Syahbanu
Indonesian Journal of Pure and Applied Chemistry Vol 2, No 2 (2019)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (706.695 KB) | DOI: 10.26418/indonesian.v2i2.36912

Abstract

One of the potential raw materials for the preparation of geopolymers is kaolin. In the present report, the used activated kaolin is from Capkala Village in West Borneo. This paper presents an experimental study on the influence of different SiO2/Al2O3 molar ratios on the compressive strength and microstructural characteristics of the Capkala kaolin-based geopolymer. The used Capkala kaolin was a product of the calcination of the source material at 750ºC 2 h. The alkaline activator solutions that were used to activate the activated capkala kaolin precursor were prepared by mixing NaOH solution with Na2SiO3 solution. The activator solution was allowed to equilibrate for a minimum of 24 h at a room temperature before use. The geopolymer was prepared by hand mixing of the Capkala kaolin and the activator solution. Experiments conducted with SiO2/Al2O3 molar ratios of 3.8; 3.9; 4.0; 4.1 and 4.2 for all mixing. The resulting pastes are cast in cylinder molds of 2.3 × 4.6 cm. The pastes hardened 24 h in the forms, at room temperature for 24 h. The geopolymer was dried at 60ºC 2 h. The geopolymer was tested for compressive strength and sample pieces were taken from ones with the highest strength for XRD and SEM. Based on the test was obtained that geopolymer with 3.9 SiO2/Al2O3 ratios has the highest compressive strength that is 2.820 Mpa. The XRD analysis showed the peak at 2θ(º) 26,69o, 20,92o dan 19,77 o. The spectra FTIR of geopolymer showed the absorption at 3289.96 cm-1; 1647.67 cm-1 and 955.65 cm-1. Moreover, there are functional groups absorption for geopolymer such Al-OH stretch vibration (near 900 cm-1), stretch vibration of Si-O and Al-O (600-700 cm-1), Si-O-Al bend vibration (near 500 cm-1). The morphology of the capkala kaolin based geopolymer with SEM has succeeded in changing the kaolin structures in the form of regular slabs to be more irregular due to heating with a temperature of 750ºC.

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