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All Journal VALENSI Chimica et Natura Acta Jurnal Ilmiah Berkala: Sains dan Terapan Kimia Jurnal Sains dan Kesehatan Kimia Padjadjaran
Retna Putri Fauzia
Departemen Kimia, FMIPA, Universitas Padjadjaran
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology

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Peningkatan Skala Sintesis Nanopartikel Gadolinium dengan Metode Hidrotermal sebagai Senyawa Pengontras MRI: Scaled-up Synthesis of Gadolinium Nanoparticles by Hydrothermal Method as MRI Contrast Agent Rahmani, Azmi Aulia; Fauzia, Retna Putri; Bahti, Husein Hernadi; Wyantuti, Santhy
Jurnal Sains dan Kesehatan Vol. 6 No. 5 (2024): J. Sains Kes.
Publisher : Fakultas Farmasi, Universitas Mulawarman, Samarinda, Indonesia

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Abstract

Magnetic resonance imaging (MRI) has become one of the most powerful medical imaging techniques in the early diagnosis of diseases to reduce the high mortality of cancer. A contrast agent is required to enhance the contrast between the lesion tissue and healthy tissue. Gadolinium nanoparticles have been a development strategy for gadolinium chelate-based MRI contrast compounds. Nanoparticles offer several advantages such as lower toxicity and high stability, as well as allowing better control of surface properties and dose reduction to enhance contrast in MRI images. This study focuses on the scale-up of gadolinium nanoparticle synthesis by hydrothermal method based on previous optimised results. The gadolinium nanoparticles were coated with PEG polymer for the purpose of colloidal stability and good biocompatibility. The gadolinium nanoparticles shows a spherical with an average hydrodynamic diameter of 11.4 nm. Comprehensive characterisation was conducted to evaluate and confirm gadolinium nanoparticles can be used as candidate MRI contrast agents. Keywords:          Contrast Agent, Gadolinium Nanoparticle, PEG, and Scale-up   Abstrak Magnetic Resonance Imaging (MRI) menjadi salah satu pencitraan medis yang paling unggul dalam diagnosis dini penyakit guna menekan tingginya mortalitas akibat kanker. Senyawa pengontras diperlukan untuk meningkatkan kontras antara jaringan lesi dan jaringan sehat. Nanopartikel gadolinium telah menjadi strategi pengembangan senyawa pengontras MRI berbasis gadolinium kelat. Nanopartikel menawarkan beberapa keuntungan berupa toksisitas yang lebih rendah dan stabilitas yang tinggi, serta memungkinkan kontrol yang lebih baik terhadap sifat permukaan dan pengurangan dosis untuk meningkatkan kontras pada gambar MRI. Penelitian ini berfokus kepada peningkatan skala sintesis nanopartikel gadolinium dengan metode hidrotermal berdasarkan hasil optimal sebelumnya. Nanopartkel gadolinium dilapisi polimer PEG untuk keperluan stabilitas koloid dan biokompatibilitas yang baik. Nanopartikel gadolinium hasil sintesis berbentuk bulat dengan rata-rata diameter sebesar 11.4 nm. Karakterisasi komprehensif dilakukan untuk mengevaluasi dan memastikan nanopartikel gadolinium dapat digunakan sebagai kandidat senyawa pengontras MRI. Kata Kunci:         Senyawa Pengontras, Nanopartikel Gadolinium, PEG, dan Peningkatan Skala
Comparative Study of Voltammetric Analysis with UV-Vis Spectrophotometry in Determining the Results of Liquid-Liquid Extraction of Samarium (III) Wyantuti, Santhy; Nurwulanda, Salsha; Mardiah, Najmah; Anggraeni, Anni; Pratomo, Uji; Fauzia, Retna Putri; Bahti, Husein H.
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 10, No. 2, November 2024
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v10i2.38941

Abstract

Rare earth elements (REEs) are garnering significant attention in diverse fields due to their important and fascinating properties. Among these REEs, samarium (Sm) has numerous advantages and benefits. Before using Sm, it must be separated from its natural sources due to the formation of complex compounds with other elements. To achieve this, liquid-liquid extraction emerges as one of the REE separation methods, presenting several advantages, including a streamlined process. Various methods can be used to analyze extraction results, such as ICP-MS and XRF. In comparison, UV-Vis spectrophotometry has significant advantages compared to other methods, it provides a simple approach to determining the level of a substance, and the results given are quite accurate, while differential pulse voltammetry (DPV) is one of the electrochemical analysis methods that is expected to provide faster and accurate analysis results. This study aims to determine the value of analytical parameters, Kd of Sm(III) liquid-liquid extraction results using DPV analysis and UV-Vis spectrophotometry methods. The DPV method yielded LoD 1.24 mg/L,  accuracy 98.39%, and %recovery 106.69%. The extraction data obtained Kd Sm values ranging from 6.0019-7.3860. The UV-Vis spectrophotometry results provided an individual extraction efficiency of Sm(III) of 88.54%. This method obtained LoD 0.71 mg/L, accuracy 96.00%, and %recovery 104.00%.
Co-Authors Abdul Mutalib Abdul Mutalib Abdul Mutalib Abdul Mutalib Anni Anggraeni Anni Anggraeni Anni Anggraeni, Anni Ari Hardianto Bahti, Husein Hernadi Diana Hendrati Herman Herman Husein Hernadi Bahti Mardiah, Najmah Megasari Pratiwi Muhammad Yusuf Muhammad Yusuf Nurwulanda, Salsha Pratiwi, Megasari Pratomo, Uji R. Ukun M.S. Soedjanaatmadja Rahmani, Azmi Aulia Rahmanillah, Kharitas I. Rokhmat, Launa Silky Karenindra Santhy Wyantuti Sodjanaatmadja, Ukun M. S. Sutanto, Cindy Florencia Ukun M. S. Sodjanaatmadja Zahra, Sahlaa Alifah Zuhrotun Nafisah