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INDONESIA
Indonesian Journal of Chemical Analysis (IJCA)
Published by Universitas Islam Indonesia
ISSN : 26227401     EISSN : 26227126     DOI : -
Core Subject : Science, Social, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science
IJCA (Indonesian Journal of Chemical Analysis) is a chemistry journal published by Chemical Analysis Department, Faculty of Mathematics and Natural Sciences, Universitas Islam Indonesia. IJCA publishes original research articles or review articles on aspect all of the chemistry fields especially in analytical methods, procedures, and principles. IJCA has the vision to become a reputable journal and can publish good quality papers. We aim to provide lecturer, researchers both academic and industries, and students worldwide with unlimited access to publishing in our journal.
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Articles 9 Documents
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Search results for , issue "Vol. 6 No. 1 (2023): Indonesian Journal of Chemical Analysis" : 9 Documents clear
Antioxidant Test and Flavonoids Determination of Tuber Pakis Kinca (Nephrolepis cordifolia (L) C. Presl) Samsul Hadi; Arif Subekti; Amalia Khairunnisa
Indonesian Journal of Chemical Analysis (IJCA) Vol. 6 No. 1 (2023): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol6.iss1.art1

Abstract

One of the things that causes cell damage in the body is the formation of unpaired electrons, also known as free radicals, which can cause oxidative stress. Excessive oxidative stress is not maintained by the body's natural antioxidants, so natural antioxidants are needed from outside. One of the plants suspected of having antioxidant abilities is Pakis kinca. So, the aim of this study was to determine the levels of flavonoids and antioxidant abilities in the tuber of N. cordifoli. Therefore, the method used to determine flavonoids is by reacting with AlCl3 and reading by UV-vis spectrophotometry, while reacting antioxidants with DPPH using spectrophotometry. The results of the flavonoid test were 3.119 ± 0.09 w/w equivalent to quercetin, from this equation the flavonoid content in the range of the equation was obtained. The results of the antioxidant test obtained the mean value of antioxidants was 93.898 ± 0.923. The conclusion obtained is that the antioxidant IC50 value of tuber extract N. cordifolia is a strong category with a total flavonoid content of 3.119 ± 0.091 w/w equivalent to quercetin.
Potential of Bacillus sp. from Kebun Raya Liwa as a Producer of Indole Acetic Acid (IAA) Hormone Fadlina Athfin; Kusuma Handayani; Wawan A. Setiawan; C. Nugroho Ekowati
Indonesian Journal of Chemical Analysis (IJCA) Vol. 6 No. 1 (2023): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol6.iss1.art2

Abstract

Kebun Raya Liwa’s soil has the potential to allow for a population of microorganisms such as the Bacillus sp. Bacillus sp. Kebun Raya Liwa are known to produce phytohormones that have the potential to help plant growth and development, one of which is the hormone Indole Acetic Acid (IAA). This study aims to determine the potential of Bacillus sp. from the soil of Kebun Rawa Liwa in producing IAA hormones. The research method included taking soil samples, preparing Nutrient Agar (NA) medium, measuring soil pH samples, isolating soil bacteria, purifying and characterizing Bacillus sp., preparing IAA standard curves, and testing the potency of Bacillus sp. IAA production was carried out in two ways, namely measuring the content of IAA with the addition of tryptophan and without the addition of tryptophan. IAA concentration was measured using a spectrophotometer with a wavelength of 520 nm. The data obtained is presented in tabular form. The isolation results obtained 10 isolates that were able to produce IAA hormone with and without tryptophan. The highest IAA production without tryptophan was isolate BP 5 with a concentration of 1.18 ppm, and the isolate that was able to produce the highest IAA with tryptophan was isolate BP 13 with a concentration of 3.90 ppm. This indicates that the isolate Bacillus sp. from the soil rhizosphere Kebun Raya Liwa can produce IAA hormones.
Production of Resistant Starch from Avocado Seeds (Persea americana) through Streptomyces sp. AB8 Fermentation and Autoclaving-Cooling Variations Achmad Arifiyanto; Siti Inah; Indah Sukma Ningsih; Christina Nugroho Ekowati; Tundjung Tripeni Handayani
Indonesian Journal of Chemical Analysis (IJCA) Vol. 6 No. 1 (2023): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol6.iss1.art3

Abstract

Agricultural waste with a high starch content potentially serves as a source of resistant starch. The avocado seed has not been explored much and is often thrown away as waste in consuming avocados. Resistant starch has properties and functions as dietary fiber and has advantages as a prebiotic. This study aims to determine the effect of fermentation treatment using Streptomyces sp. AB 8 and variations in the number of pressure-cooling heating cycles to increase avocado seed-resistant starch. The research phase consisted of pre-treating the avocado seeds and fermentation by Streptomyces sp. AB 8 followed by a pressure heating-cooling stage with 0, 1, 2, and 3 cycles. Concerning modified starch, this study also measured levels of starch, amylose, amylopectin, and resistant starch. Digestion test using Lactobacillus sp. by viewing the clear zone around the colonies after 48 hours to evaluate the digestibility of resistant starch. The results of this study indicate that the fermentation treatment by Streptomyces sp. AB 8 and pressure-cooling heating can increase the levels of resistant starch in avocado seeds. Fermentation treatment with two cycles of heating-pressure-cooling (S1) produced the best resistant starch content of 7.51% and had the highest enzymatic index of 2.48 ± 0.45.
The Effect of Pineapple Leaf Fiber Addition to Mechanical and Thermal Characteristics of Sago Starch Based Biofoam with Thermopressing Method Rozanna Dewi; Novi Sylvia; Zulnazri Zulnazri; Medyan Riza
Indonesian Journal of Chemical Analysis (IJCA) Vol. 6 No. 1 (2023): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol6.iss1.art4

Abstract

Biofoam can be used as an alternative packaging to Styrofoam. Biofoam made from starch and cellulose fibers has biodegradable properties. In this study used pineapple leaf fiber as an additive to strenghen on mechanical properties of biofoam. The research method consists of several stages, cooking pineapple leaf fiber, biofoam preparation, and testing phase on the resulting biofoam. The mechanical characteristics test of biofoam is a tensile strength test of 1.66-2.86 Mpa. Compound composition test through Fourier Transform Infrared Spectroscopy (FTIR) is hydrophilic which binds to water so that it is easily degraded by soil, thermal characteristics with DSC thermogram test of pineapple leaf fiber biofoam sample 15 gr shows at a temperature of 98.04 °C occurs peak thermogram showing physical changes. TGA analysis showed that biofoam has good thermal stability. In the morphology of biofoam visible white lumps and grooves on the surface that shows the solubility is not too perfect due to the influence of stirring time.
Synthesis of Ni doped-TiO2 Thin Film Photocatalysts on Glass Surfaces Margareta Caroline Harunrasjid; Anthoni Batahan Aritonang; M. Agus Wibowo; Puji Ardiningsih; Adhitiyawarman Adhitiyawarman
Indonesian Journal of Chemical Analysis (IJCA) Vol. 6 No. 1 (2023): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol6.iss1.art9

Abstract

Thin film of TiO2 modified Ni2+ cationic (Ni doped-TiO2) thin films were synthesized from titanium tetraisopropoxide (TTIP) and Ni(NO3)2.6H2O using the combined sol-gel and dip coating method followed by calcination at 500oC for an hour. This study aims to determine the concentration of Ni2+ and the optimum number of layers for application as self-cleaning. Frontier transform infrared (FTIR) spectrophotometric analysis observed a shift in the vibration absorption peak of Ti-O towards a smaller wave number as an indication that the Ni2+ cationic have incorporated in the TiO2matrix in forming Ni-TiO2. Based on the of x-ray diffraction (XRD) it is known that Ni-TiO2 has anatase crystalline phase with a crystallite size of 149.20 nm. Diffuse reflectance ultraviolet-visible (DRSUV-Vis) spectrophotometry showed a decrease in the bandgap energy (3.2 eV to 2.22 eV). Surface morphological by scanning electron microscopy (SEM) method showed that the addition of polyethylene glycol (PEG) resulted in a more homogeneous distribution of particles than thin films without PEG. The self-cleaning activity of Ni-TiO2 was tested for surface hydrophilic properties by measuring the contact angle of water and oil droplets under visible light illumination.
Characterization of Zeolite ZSM-5 Synthesized from Kaolin and TPABr Using X-Ray Diffraction and Infrared Spectroscopy Abdul Hamid; Faizatur Rohmah; Tri Esti Purbaningtias; Mohammad Abdullah
Indonesian Journal of Chemical Analysis (IJCA) Vol. 6 No. 1 (2023): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol6.iss1.art5

Abstract

Kaolin with alumina and silica content is used as the main material in this research to study the synthesis of ZSM-5 zeolite. The hydrothermal process was carried out through different aging times, namely 12, 24 and 36 hours. Tetrapropyl ammonium bromide (TPABr) was used as a template for the Mobile Five-1 (MFI) structure guide. X-ray diffraction (XRD) and infrared spectroscopy (FTIR) instruments were used to characterize the ZSM-5 zeolite formed from the synthesis results. This was done to identify the phase change from kaolin to zeolite ZSM-5. The results of the analysis using XRD for all samples showed a characteristic peak of the ZSM-5 zeolite at 2θ around 7.88°; 8.72° ;23.09°; 23.84° and 24.32°. However, samples with an aging time of 12 hours also showed peaks at 2θ around 15.84° and 26.03° which indicated an analsim phase. The absorption bands from the FTIR characterization for all samples are seen at wave numbers around 453, 542, 793, 1088 and 1221 cm−1 which are the characteristic peak points of ZSM-5 zeolite. The longer the aging time indicates that the crystallinity of the ZSM-5 zeolite is increasing. The highest crystallinity was obtained from ZSM-5 zeolite samples which were aged for 36 hours. This indicates an increasing number of ZSM-5 crystal nuclei with high purity because there is no other phase besides the ZSM-5 phase.
The Effect of Slip Polymer Additives on the Characteristics of Polyethylene Films Putri Intan Puspa Ningrum; Ani Mulyasuryani; Rakhma Febriani
Indonesian Journal of Chemical Analysis (IJCA) Vol. 6 No. 1 (2023): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol6.iss1.art8

Abstract

Polymer additive’s function is to improve film quality, including slip additives which function as film surface lubricants. Slip additives affect the physical characteristics of the film as indicated by the coefficient of friction and optical properties. In this research, the influence of slip additives and the aging time of the coefficient of friction (COF) and the optical properties of polyethylene (PE) films have been studied. The optical properties of the film are measured based on the haze value and the gloss value. The additives used in this study were erucamide, stearyl erucamide, and a mixture of the two. Observations were made for 14 days at 23 °C and 50 °C. Measurements of the COF, haze value, and gloss value were carried out on days 0, 1, 3, 7, 10, and 14. The results showed that the lowest COF was produced on films with erucamide additives. Films with erucamide additives had the best friction coefficient value of 0.129 on the 3rd day of aging at 50 °C, a haze value of 4.63% and a gloss value of 56.5 GU.
Effect of Dolomite Addition on The Performance of Palm Oil Mill Fly Ash for Methylene Blue Adsorption Elda Pelita; Rita Youfa; Desniorita; Anang Baharuddin Sahaq; Miftahurrahmah; Resi Levi Permadani; Jerry
Indonesian Journal of Chemical Analysis (IJCA) Vol. 6 No. 1 (2023): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol6.iss1.art7

Abstract

The use of palm oil mill fly ash (FA) as a low-cost adsorbent is one of the solutions for handling FA waste. In this study, the addition of dolomite is expected to improve the adsorbent performance. The aim of this study was to investigate the optimum FA-dolomite adsorbent composition and operating conditions for methylene blue adsorption. Different parameters were studied to optimize adsorption process such as the amount of dolomite, methylene blue flow rate, bed height and number of trays. FA-dolomite was converted into nano-adsorbent by sol-gel method which was coated on zeolite surface. Nano-adsorbents were characterized by XRF, FTIR, XRD and SEM. The adsorption capacity was tested by Spectrophotometer UV-Vis. XRF characterization showed that FA had the highest SiO2 content of 58.15%, while dolomite contained CaO of 52.72%. FTIR characterization detected the groups of Si-O-Si, Si-O-Al, Ca-O and Si-O. XRD characterization showed the average crystalline size of FA-dolomite 2% adsorbent was 28.56 nm and SEM characterization showed fine pores on the adsorbent surface. The highest adsorption efficiency obtained at FA-dolomite 2% was 97.364% and the lowest obtained at FA-dolomite 8% was 13.16% with a flow rate of 500 ml/h, adsorbent height of 9 cm and 3 trays. The greater the amount of dolomite added, the absorption efficiency decreases.
Glass tube-coated TiO2 nanostructure for degradation of methylene blue: an experimental and design of column photocatalytic reactor Rahmat Hidayat; Ganjar Fadillah; Shin-Ichi Ohira
Indonesian Journal of Chemical Analysis (IJCA) Vol. 6 No. 1 (2023): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol6.iss1.art6

Abstract

This work presents the successfully of TiO2 nanostructure synthesis using manual grinding combined hydrothermal method for photocatalyst. XRD confirmed that TiO2 was arranged by anatase and rutile phase with crystal size of 18.54 nm. Characterization of digital microscope shows the spread of catalyst on the glass tube surface, which can be observed furthermore using interactive 3D surface plot. Band gap energy determination from UV-Vis spectroscopy scanning shows the minimum energy that is required to facilitate electron-hole generated. In 20 min of irradiation, TiO2 existence can completely decompose MB (100%) that can be presented by TiO2 absence. Degradation of MB is higher effective in acidic condition which optimum pH of 5. Using first order reaction, glass tube-coated TiO2 has rate constant of 0.2102 min-1, 1.5 times faster than bare glass tube. This enhancement proves that the designed reactor has good prospect for organic pollutant treatment. Moreover, compared with other reported study, this system provides relatively more effective of MB photodegradation.

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