Penentuan Unsur Tanah Jarang Kelompok Sedang secara Voltammetri Pindai Linier Menggunakan Elektrode Grafit Pensil
Abstract
Rare earth elements play an important role in a variety of applications, mostly for high-tech industries. But their presence in mineral jointly separation makes it difficult to determine the content of rare earths because each element has physical and chemical properties are almost identical. The purpose of this study is the use of a linear scan voltammetry method to study the electrochemical characteristics of the medium rare earth element group (Sm, Gd, Eu, Tb), as an alternative method of separation and analysis of rare earth elements. The electrode used is a graphite pencil electrodes without modification, with a variety of supporting electrolyte. The results obtained show some supporting electrolyte provides good reduction peak for gadolinium, compared to the peaks of the reduction potential of the single rare earth ions other. The potential range of the most well using pencil graphite electrode obtained at 0.50 V to -1.00 V. Analysis of single gadolinium provide linear regression equation in a concentration range of 4.0 to 10.0 mg/L by the equation Y = 0.9862 X + 0.828 with R2 = 0.9954. The limit of detection is determined from the linear regression obtained 0.72 mg / L.Downloads
References
B. Zhu, D. Wu, Y, Yang, Y. Chen, W. Li, J. Guo, Q. Wang, Selective Removal of La(III) Ions Using Super-Paramagnetic Nanosorbent Coated by Saponified sec-Octylphenoxy Acetic Acid. J. Chem. Eng. Data., 57 (2012) 553.
D. Wu, L. Zhang, L. Wang, B. Zhu, L. Fa, Adsorption of lanthanum by magnetic alginate-chitosan gel beads, J. Chem. Technol. Biotechnol., 86 (2011) 345.
Fontana, D & Loris, F. 2009. Separation of Middle Rare Earths by Solvent Extraction Using 2-ethyl heksyl phosphonic acid mono-2-ethylheksyl ester. Journal of Rare Earth. 27: 830-833.
Suwargi, E., B. Pardiarto & T. Ishlah. 2010. Potensi Logam
Tanah Jarang di Indonesia. Buletin Sumber Daya Geologi. 5 (3), 131-140.
A. Skroce, M. McCormick, B. Meehan, V. Dolic, K. Peverill, Determination of lanthanum by graphite furnace atomic absorption spectrometry with a tantalum platform. Spectrochim. Acta, Part B, 48 (1993) 1639.
V.K. Jain, A. Handa, S.S. Sait, P. Shrivastav, Y.K. Agrawal, Pre-concentration, separation and trace determination of lanthanum(III), cerium(III), thorium(IV) and uranium(VI) on polymer supported o-vanillinsemicarbazone, Anal. Chim. Acta, 429 (2001) 237.
Y.K. Agrawal, P. Shrivastav, Solvent extraction, spectrophotometric and inductively coupled plasma atomic emission spectroscopic (ICP-AES) determination of lanthanum(III) with crown hydroxamic acid. Talanta, 44 (1997) 1307.
Fujimori E., Hayashi T., Inagaki K., Haraguchi H. Determination of lanthanum and rare earth elements in bovine whole blood reference material by ICP-MS after coprecipitation preconcentration with heme-iron as coprecipitant. Fresenius’ J. Anal. Chem. 1999;363:277–282.
F.A. Aydin, M. Soylak, Separation, preconcentration and inductively coupled plasma-mass spectrometric (ICP-MS) determination of thorium(IV), titanium(IV), iron(III), lead(II) and chromium(III) on 2-nitroso-1-naphthol impregnated MCI GEL CHP20P resin. J. Hazard. Mater., 173 (2010) 669.
Khalil, Sabry. "Ion-selective electrode for lanthanum determination in standard samples." Analytical letters 36.7 (2003): 1335-1349.
M.R. Ganjali, V. Akbar, M. Ghorbani, P. Norouzi, A. Ahmadi, Fluoride determination in some mouth wash preparations by a novel La (III) graphite coated membrane sensor based on amitraz. Anal. Chim. Acta, 531 (2005) 185.
M. Akhond, M.B. Najafi, J. Taskhourian, Lanthanum-selective membrane electrode based on 2, 2′-dithiodipyridine. Anal. Chim. Acta, 531 (2005) 179.
Wang, J. 2000. Analytical Electrochemistry. Wiley-VCH. New York.
M. Javanbakht, H. Khoshsafar, M.R. Ganjali, P. Norouzi, M. Adib, Adsorptive Stripping Voltammetric Determination of Nanomolar Concentration of Cerium (III) at a Carbon Paste Electrode Modified by N′‐[(2‐Hydroxyphenyl). Electroanalysis, 21 (2009) 1605.
B. Sebez, B. Ogorevc, S.B. Hocevar, M. Veber, Functioning of antimony film electrode in acid media under cyclic and anodic stripping voltammetry conditions. Anal. Chim. Acta, 785 (2013) 43.
Copyright (c) 2018 Al-Kimia
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Authors who publish with this journal agree to the following terms:
1) Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
2) Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
3)Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
