Indonesian Journal of Chemical Analysis (IJCA)
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.
Articles
73 Documents
<![CDATA[Material MOFs (Metal Organic Frameworks) dalam Aplikasi Fotokatalisis: Mini Review ]]>
<![CDATA[Rahmat Hidayat]]>;
<![CDATA[Anggi Saputra]]>;
<![CDATA[Murni Fitria]]>
<![CDATA[ Indonesian Journal of Chemical Analysis (IJCA) Vol. 5 No. 2 (2022): Indonesian Journal of Chemical Analysis ]]>
Publisher : <![CDATA[Universitas Islam Indonesia ]]>
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DOI: 10.20885/ijca.vol5.iss2.art7
<![CDATA[MOFs (Metal Organic Frameworks) telah banyak dilaporkan berhasil diaplikasikan dalam berbagai bidang salah satunya fotokatalitik. MOFs tersusun dari ion logam atau cluster oksida logam, senyawa penghubung organik (linker), serta senyawa lain sebagai senyawa tamu (guest) yang memberikan banyak keunggulan jika digunakan sebagai material fotokatalis. Kemampuan menyerap foton dari cahaya serta porositas yang baik menyebabkan MOFs menarik untuk diaplikasikan sebagai fotokatalis. Kestabilan sifat kimia yang kurang baik dan tidak begitu sensitif terhadap sinar tampak menjadi pokok persoalan yang membuat MOFs masih mengalami banyak perkembangan. Berbagai metode dilakukan dengan memodifikasi ion logam, linker, maupun pada senyawa tamu untuk mendapatkan material MOFs dengan kestabilan sifat kimia yang baik, peningkatan luas area permukaan, dan mampu menyerap banyak sinar pada daerah tampak.]]>
<![CDATA[Analisis Protein Gen LCYB pada Mikroalga Laut Phaeodactylum tricornutum menggunakan Pendekatan Bioinformatika ]]>
<![CDATA[Murni Fitria]]>;
<![CDATA[Anggi Saputra]]>;
<![CDATA[Rahmat Hidayat]]>;
<![CDATA[Niken Feladita]]>
<![CDATA[ Indonesian Journal of Chemical Analysis (IJCA) Vol. 5 No. 2 (2022): Indonesian Journal of Chemical Analysis ]]>
Publisher : <![CDATA[Universitas Islam Indonesia ]]>
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DOI: 10.20885/ijca.vol5.iss2.art8
<![CDATA[LCYB merupakan gen yang memproduksi enzim Lycopene Beta Cyclase. Enzim Lycopene Beta Cyclase beperan dalam mengubah likopen menjadi ß-karoten. Gen LCYB terdapat pada diatom maupun mikroalga hijau. Berbeda dengan mikroalga hijau, penelitian mengenai struktur protein Lycopene Beta Cyclase selaku produk gen LCYB pada diatom masih minim publikasi. Dalam penelitian ini dilakukan prediksi struktur produk gen LCYB pada diatom P. tricornutum secara bioinformatika. Untuk menganalisis perbedaan produk gen LCYB pada diatom dan mikroalga hijau, produk gen LCYB pada diatom P. tricornutum dibandingkan dengan produk gen LCYB pada mikroalga hijau M. zofingiensis. Konstruksi pohon filogenetik dilakukan menggunakan perangkat lunak MEGA7. Analisis gen LCYB dan struktur produk gen LCYB dilakukan menggunakan beberapa perangkat bioinformatika. Analisis docking dilakukan untuk memperkuat prediksi adanya interaksi antara produk gen LCYB hasil prediksi dengan ligannya menggunakan AutoDocksTools-1.5.6. M. zofingiensis memiliki hubungan kekerabatan yang jauh dengan P. Tricornutum sehingga kemiripan gen dan produk gen LCYB hasil prediksi juga jauh berbeda. Mikroalga hijau M. zofingiensis mengandung protein transmembran yang tidak dimiliki pada diatom P. Tricornutum. Hasil docking menunjukkan adanya interaksi antara produk gen LCYB hasil prediksi dengan ligannya yaitu likopen.]]>
<![CDATA[Estimasi Angka Ketidakpastian Asal Kalibrasi Instrumen Terhadap Pengujian Kualitas CPO ]]>
<![CDATA[Tri Esti Purbaningtias, M.Si.]]>;
<![CDATA[Bayu Wiyantoko]]>;
<![CDATA[Rudy Syahputra]]>;
<![CDATA[Yorfan Ruwindya]]>;
<![CDATA[Suci Miranda]]>;
<![CDATA[Rofi'atun Nashriyah]]>;
<![CDATA[Bagoes Wibowo]]>
<![CDATA[ Indonesian Journal of Chemical Analysis (IJCA) Vol. 5 No. 2 (2022): Indonesian Journal of Chemical Analysis ]]>
Publisher : <![CDATA[Universitas Islam Indonesia ]]>
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DOI: 10.20885/ijca.vol5.iss2.art9
<![CDATA[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%.]]>
<![CDATA[Karakteristik dan Aktivitas Antibakteri pada Edible Film Berbasis Pati Ubi Kayu dengan Penambahan Minyak Cengkeh ]]>
<![CDATA[Aprisilia Risky Wijaya]]>
<![CDATA[ Indonesian Journal of Chemical Analysis (IJCA) Vol. 5 No. 2 (2022): Indonesian Journal of Chemical Analysis ]]>
Publisher : <![CDATA[Universitas Islam Indonesia ]]>
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DOI: 10.20885/ijca.vol5.iss2.art6
<![CDATA[Kesadaran konsumen terhadap makanan berkualitas dan ramah lingkungan semakin tinggi. Beberapa penelitian telah mengembangkan produk pengemas yang edible dan aktif. Penelitian ini bertujuan untuk menghasilkan edible film yang memiliki aktivitas antibakteri. Pembuatan edible film pada penelitian ini menggunakan bahan dasar pati yang diekstrak dari ubi kayu. Bahan tambahan yang digunakan yaitu Carboxymethyl cellulose, gliserol dan minyak cengkeh. Variasi konsentrasi minyak cengkeh yang digunakan yaitu 1%, 2% dan 3%. Berdasarkan analisis Gas Chromatography-Mass Spectra (GC-MS), komponen utama dari minyak cengkeh adalah eugenol. Eugenol berperan terhadap aktivitas antibakteri pada edible film. Semakin tinggi konsentrasi minyak cengkeh, semakin tinggi daya hambat bakteri. Edible film dengan penambahan minyak cengkeh 3% memiliki daya hambat bakteri yang tertinggi yaitu 8,5 mm untuk bakteri Escherichia coli dan 11,3 mm untuk bakteri Staphylococcus aureus. Tingkat kelarutan edible film menurun seiring dengan penambahan minyak cengkeh yaitu 78,77%-39,38%. Penambahan minyak cengkeh pada pembuatan edible film berbasis pati mampu menghambat pertumbuhan bakteri Staphylococcus aureus dan Eschericia coli. Namun, semakin tinggi penambahan minyak cengkeh akan menurunkan tingkat kelarutan edible film.]]>
<![CDATA[Antioxidant Test and Flavonoids Determination of Tuber Pakis Kinca (Nephrolepis cordifolia (L) C. Presl) ]]>
<![CDATA[Samsul Hadi]]>;
<![CDATA[Arif Subekti]]>;
<![CDATA[Amalia Khairunnisa]]>
<![CDATA[ Indonesian Journal of Chemical Analysis (IJCA) Vol. 6 No. 1 (2023): Indonesian Journal of Chemical Analysis ]]>
Publisher : <![CDATA[Universitas Islam Indonesia ]]>
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DOI: 10.20885/ijca.vol6.iss1.art1
<![CDATA[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.]]>
<![CDATA[Potential of Bacillus sp. from Kebun Raya Liwa as a Producer of Indole Acetic Acid (IAA) Hormone ]]>
<![CDATA[Fadlina Athfin]]>;
<![CDATA[Kusuma Handayani]]>;
<![CDATA[Wawan A. Setiawan]]>;
<![CDATA[C. Nugroho Ekowati]]>
<![CDATA[ Indonesian Journal of Chemical Analysis (IJCA) Vol. 6 No. 1 (2023): Indonesian Journal of Chemical Analysis ]]>
Publisher : <![CDATA[Universitas Islam Indonesia ]]>
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DOI: 10.20885/ijca.vol6.iss1.art2
<![CDATA[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.]]>
<![CDATA[Production of Resistant Starch from Avocado Seeds (Persea americana) through Streptomyces sp. AB8 Fermentation and Autoclaving-Cooling Variations ]]>
<![CDATA[Achmad Arifiyanto]]>;
<![CDATA[Siti Inah]]>;
<![CDATA[Indah Sukma Ningsih]]>;
<![CDATA[Christina Nugroho Ekowati]]>;
<![CDATA[Tundjung Tripeni Handayani]]>
<![CDATA[ Indonesian Journal of Chemical Analysis (IJCA) Vol. 6 No. 1 (2023): Indonesian Journal of Chemical Analysis ]]>
Publisher : <![CDATA[Universitas Islam Indonesia ]]>
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DOI: 10.20885/ijca.vol6.iss1.art3
<![CDATA[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.]]>
<![CDATA[The Effect of Pineapple Leaf Fiber Addition to Mechanical and Thermal Characteristics of Sago Starch Based Biofoam with Thermopressing Method ]]>
<![CDATA[Rozanna Dewi]]>;
<![CDATA[Novi Sylvia]]>;
<![CDATA[Zulnazri Zulnazri]]>;
<![CDATA[Medyan Riza]]>
<![CDATA[ Indonesian Journal of Chemical Analysis (IJCA) Vol. 6 No. 1 (2023): Indonesian Journal of Chemical Analysis ]]>
Publisher : <![CDATA[Universitas Islam Indonesia ]]>
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DOI: 10.20885/ijca.vol6.iss1.art4
<![CDATA[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.]]>
<![CDATA[Synthesis of Ni doped-TiO2 Thin Film Photocatalysts on Glass Surfaces ]]>
<![CDATA[Margareta Caroline Harunrasjid]]>;
<![CDATA[Anthoni Batahan Aritonang]]>;
<![CDATA[M. Agus Wibowo]]>;
<![CDATA[Puji Ardiningsih]]>;
<![CDATA[Adhitiyawarman Adhitiyawarman]]>
<![CDATA[ Indonesian Journal of Chemical Analysis (IJCA) Vol. 6 No. 1 (2023): Indonesian Journal of Chemical Analysis ]]>
Publisher : <![CDATA[Universitas Islam Indonesia ]]>
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DOI: 10.20885/ijca.vol6.iss1.art9
<![CDATA[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.]]>
<![CDATA[Characterization of Zeolite ZSM-5 Synthesized from Kaolin and TPABr Using X-Ray Diffraction and Infrared Spectroscopy ]]>
<![CDATA[Abdul Hamid]]>;
<![CDATA[Faizatur Rohmah]]>;
<![CDATA[Tri Esti Purbaningtias]]>;
<![CDATA[Mohammad Abdullah]]>
<![CDATA[ Indonesian Journal of Chemical Analysis (IJCA) Vol. 6 No. 1 (2023): Indonesian Journal of Chemical Analysis ]]>
Publisher : <![CDATA[Universitas Islam Indonesia ]]>
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DOI: 10.20885/ijca.vol6.iss1.art5
<![CDATA[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.]]>
