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All Journal VALENSI International Journal of Renewable Energy Development JURNAL KIMIA SAINS DAN APLIKASI Jurnal Ilmu Dasar Jurnal Sains Materi Indonesia Alchemy : Journal of Chemistry Jurnal Matematika & Sains Alchemy Jurnal Penelitian Kimia Jurnal Ikatan Alumni Fisika Universitas Negeri Medan Jurnal Penelitian Sains Chimica et Natura Acta ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Chemistry PHARMACY: Jurnal Farmasi Indonesia (Pharmaceutical Journal of Indonesia) Jurnal Ilmu Kefarmasian Indonesia PROFICIO: Jurnal Pengabdian Masyarakat CHEDS: Journal of Chemistry, Education, and Science Jurnal Ilmiah Berkala: Sains dan Terapan Kimia Jurnal Akademika Kimia IPER (Indonesian Physics Education Research) al Kimiya : Jurnal Ilmu Kimia dan Terapan Jurnal Akademika Kimia Journal of Tropical Pharmacy and Chemistry Kimia Padjadjaran
Husein Hernadi Bahti
Departemen Kimia, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Padjadjaran, Jalan Raya Bandung-Sumedang Km.21, Jatinangor, Sumedang 45363
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Education Energy Engineering Environmental Science Health Professions Immunology & microbiology Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Public Health Social Sciences Other

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Journal : VALENSI

 1 
A Computational Study on the Effects of Molecular Structures of Di-n-butyldithiophosphate and of its Derivatives on the Stability of Their Complex Compounds with Rare-Earth Elements Nurdeni Nurdeni; Atje Setiawan Abdullah; Budi Nurani Ruchjana; Hardianto A; Anggraeni A; Muthalib A; Husein H Bahti
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 5, No. 2, November 2019
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (403.572 KB) | DOI: 10.15408/jkv.v5i2.10652

Abstract

The stability of complex compounds  formed from the ligand di-n-butyldithiophosphate (DBDTP) and its derivatives, with ions of rare-earth elements (REEs), such as gadolinium ion (Gd3+), is an important factor in the separation and purification processes of the elements using solvent extraction method. The complex stability is dependent, one of which, on the partial charge of the donor atom (S atom in this case) in the molecule of DBDTP or its derivatives. The more negative the partial charge of the donor atom, the more stable is the complex compound formed. The purpose of this study is to explore the effect of electron donating, and of electron withdrawing groups, as well as the effect of the structure of the butyl group in the molecules of  DBDTP and or its derivatives on the partial charge of the donor atom. The method used was the semi empirical quantum mechanical calculations, i.e. the Austin Model 1 (AM1). The results of the study showed that the electron withdrawing group of -CN had resulted in the most positive charge on the donor atom, if it is on the second carbon atom of the butyl group in the DBDTP and or its derivatives. Conversely, in the same carbon atom position, the donating electron group of -CH=CH2 had generated the most negative partial charge on the donor atom. Furthermore, the results of this study also revealed that the sec-butyl isomer produced the most negative partial charge on the donor atom, among other isomers.
The Effect of Acetonitrile Solvent on the Quantitative Determination of Europium (III) by Voltammetry and its Optimization using the Box-Behnken Design Uji Pratomo; Ari Hardianto; Yeni Wahyuni Hartati; Husein Hernandi Bahti; Santhy Wyantuti
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 8, No. 1, May 2022
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v8i1.22508

Abstract

There is often a drawback during the determination of Eu in aqueous solvents using the voltammetric method. The current signal from water can reduce that of the element, which causes difficulty while separating the Eu signal from other rare earth elements (REE). Therefore, this study used acetonitrile as a solvent due to its high electrical conductivity and wide potential range. The optimum conditions for the determination of Eu in acetonitrile using the Box-Behnken design include 74.56 seconds deposition time, 0.125 V amplitude modulation, and -2.0 V potential deposition. The platinum electrode's performance showed a recovery value of 98.91% and accuracy and precision (in %RSD) of 96.67% and 1.11%, respectively. Furthermore, detection and quantitation limits of 0.6 mg/L and 5.1 mg/L were recorded from the analysis. It concluded that the differential pulse voltammetry method was applied to determine the presence of Eu in acetonitrile.
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 : Syarif Hidayatullah 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%.
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 A. Mutalib A. Mutalib Abd. Rasyid Syamsuri Abdul Haris Watoni Abdul Mutalib Abdul Mutalib Abdul Mutalib Abdul Mutalib Abdul Mutalib Abdul Mutalib Abdul Mutholib Achmad Zainudin Achmad Zainudin, Achmad Afifah R. Widianti Afifah Rana Widianti Anak Agung Istri Sri Wiadnyani Anggraeni A Anna Permanasari Anni Anggraeni Anni Anggraeni Anni Anggraeni Anni Anggraeni Anni Anggraeni Anni Anggraeni Anni Anggraeni Anni Anggraeni Anni Anggraeni Anni Anggraeni Anni Anggraeni, Anni Ari Hardianto Arie Hardian Atje Setiawan Abdullah Br Ginting, Ela Riana Budi Nurani Ruchjana Dachariyanus Dachariyanus Dachariyanus Dachariyanus Dachrianus Dachrianus Dachriyanus Dewianti, Zenith Putri Diana Hendrati Diana Hendrati Diana Hendrati DOLIH GOZALI Dwi Ratna Setiani Effendi, Syulastri Elfita Elfita Elfita Elfita Elfita Elsa Aghnia M Erianti Siska Purnamasari Fauzia Salsabila Fauzia, Retna P. Handias Meilinda Hardianto A Herman Herman Heru Agung Saputra I Gusti Bagus Wiksuana Iwan Hastiawan Iwan Hastiawan Janitra, R S Karmina, Putri Karya Sinulingga Laode Rijai Linda Septiana Lisda Virdasari Madyawati Latief Mardiah, Najmah Marline Abdassah Motlan . Muhammad Yusuf Muhammad Yusuf Muharni Muharni Muharni Muharni Muharni Muharni Muljadji Agma Musfiroh, Vera Muthalib A Novi Noviyanti Nst, Hafni Indriati Nunik Nurlina Nurdeni, Nurdeni Nurlina, Nunik Nurwulanda, Salsha Ponis Tarigan Ponis Tarigan Pratomo, Uji Primadhini Primadhini Primadhini, Primadhini Purba, Anita Zefanya M. R. Ukun M.S. Soedjanaatmadja Rahmanillah, Kharitas I. Ratna Sari Dewi Ravenna Aristantia Retna Putri Fauzia Retna Putri Fauzia Rymond Jusuf Rumampuk Santhy Wyantuti Sapto Raharjo Sembiring, Surya Julius Senadi Budiman Shauvina, Shauvina A Sodjanaatmadja, Ukun M. S. Soetijoso Soemitro Soetijoso Soemitro Soetijoso Soemitro Sofyan M Nur SOFYAN M.NUR, SOFYAN Sofyatin, Titin Soja Siti Fatimah Sundani N. Soewandhi Supriyatna Soetardjo Supriyatna Supriyatna Supriyatna Supriyatna Supriyatna Supriyatna Supriyatna Supriyatna Supriyatna Supriyatna Supriyatna Supriyatna Supriyatna Sutardjo Syafei, Minda Syafina Tarigan, Mei Cristin Titin Sofyatin Titin Sofyatin Titin Sofyatin Ukun M. S. Sodjanaatmadja Unang Supratman Vera Musfiroh W.C. Taylor Yeni Wahyuni Hartati Yue Mao Shen Zackiyah, Zackiyah Zenith Putri Dewianti