Study on the Interference of Iron, Aluminium and Silicon on the Atomic Absorption Spectrometric Determination of Mangan in Laterite Mineral

Sulistyo Saputro(1*), Ngatidjo Hadipranoto(2), Agus Kuncaka(3)

(1) Faculty of Educations, Sebelas Maret University, Surakarta
(2) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara PO BOX BLS 21 Yogyakarta 55281
(3) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara PO BOX BLS 21 Yogyakarta 55281
(*) Corresponding Author


Interference of iron, aluminum and silicon on the determination of mangan in laterite mineral by atomic absorption spectrometry has been investigated. Dissolution of laterite mineral into solution have been carried out by wet method destruction using combination of 7 mL of aquaregia, 7.5 mL of concentrated perchloric acid and 9 mL of fluoride acid 48% In sealed teflon flask heated at temperature of about 110 °C for 3 hours to determine the content of Mn element in laterite mineral directly. Interference of these three metals were carried out by evaluating the differences of Mn absorbance at wavelength 279.50 nm and slit width 0.2 nm between the solutions containing mangan only and those containing the some amount of mangan together with the interfering elements at those concentration range in laterite mineral. The result showed that both iron at concentration of 100 ppm until 500 ppm and aluminum at concentration at 3 ppm until 15 ppm caused significant and non-linear interference on the determination of Mn 2 ppm. Interference of iron was effectively eliminated by releasing action of aluminum. The signal depression reductional decrease due to 234 ppm of silicon on the determination of Mn 2 ppm can be eliminated by adding 2.30 mL of CaCl2 0.2% (m/v) into these solution. The content of Mn in the laterite mineral after and before adding of CaCl2 into solution were 2407.04 ± 59.26 μg g-1 and 2311.76 ± 23.61 μg g-1, respectively. This result was significantly different at confidence level 95% as shown by the value of tcalculated=4.91 that was higher than ttable=4.30.


laterite mineral; interference; releasing agent

Full Text:

Full Text Pdf


[1]   Anonim„ 1994, "Analytical Methods for Atomic Absorption Spectrometry", Perkin-Elmer, Connecticut, USA.

[2]   Haswell, S.J., 1991, "Atomic Absorption Spectrometry; Theory, Design and Applications", Elsevier, Amsterdam.

[3]   Ingamells, C.O., dan Pitard, F.F., 1986, "Applied Geochemical Analysis", John Wiley & Sons Inc., New York.

[4]   Jensen, M.L., dan Bateman, A.M.i 1981,"Economic Mineral Deposit", 3m Edition, John Wiley & Sons Inc., New York.

[5]   Johnson, W.M., dan Maxwell, J.A., 1981, "Rock and Mineral Analysis", 2''° Edition, John Wiley & Sons Inc., New York.

[6]   Labrecque, J.J., Rosales, P.A., Rada, G.A., Villalba, R., Yariv, S., dan Mendelovici, E., 1980, "Determination of Total manganese in Silicate and Venezuelan Laterites Using Air-C2H2 and N20-C2H2 Flames by Atomic Absorption Spectroscopy", Chem Geology., 29, 313­321.

[7]   Miller, J.C., dan Miller, J.N., 1991, "Statistics for Analytical Chemistry", 211° Edition, John Wiley & Sons Inc., New York.

[8]   Park, C.F., dan McDiarmid, R.A., 1991, "Ore Deposits", W.H. Freman and Company, San Francisco.

[9]   Parker, S.P., 1984, "McGraw-Hill Dictionary of Earth Sciences", McGraw-Hill Book Company, New York.

[10] Pecsok, R.L., Shields, L.D., Calms, T., dan McWilliam, 1.G., 1976, "Modem Method of Chemical Analysis", 2 Edition, John Wiley & Sons, New York.

[11] Pinta, M., dan Aubert, H., 1977, "Trace Elements in Soils", Elsevier Scientific Publishing Company, Amsterdam.

[12] Price, W.J., 1983, "Spectrochemical Analysis by Atomic Absorption", John Wiley & Sons, New York.

[13] Tjahjono, E.D., Firdiyono, F., Akshadi, D., Arifin Arif., dan Suharis., 1995, "Pemanfaatan Latent Indonesia", Puslitbang Metalurgi-LIPI, Kompleks Puspiptek Serpong, Jawa Barat.

[14] Welz, B., 1985, "Atomic Absorption Spectrometry", 2 Edition, VCH Publisher, Weinheim, Republic of Germany.


Article Metrics

Abstract views : 850 | views : 2837

Copyright (c) 2010 Indonesian Journal of Chemistry

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.


Indonesian Journal of Chemistry (ISSN 1411-9420 / 2460-1578) - Chemistry Department, Universitas Gadjah Mada, Indonesia.

Analytics View The Statistics of Indones. J. Chem.