Indirect determination of sulphur dioxide and sulphuric acid by flame atomic absorption spectrometry

This is an automatically generated default intro template – please do not edit.

	Read full article
Article Title:	Indirect determination of sulphur dioxide and sulphuric acid by flame atomic absorption spectrometry
Authors:	Fawzi M. El Saih, David Nagy, Imre Hegedus, Jozsef Posta*
Affiliation:	University of Debrecen, Debrecen, Hungary, Department of Inorganic and Analytical Chemistry
Abstract:	We have developed a new technique based on the rules of high-temperature processes in flame for the indirect determination of sulphur dioxid, sulphuric acid and phosphoric acid in natural samples by flame atomic absorption spectrometry (FAAS). The main point of the method is the difference in atomizaton of various inorganic salts of magnesium based on their thermal differences. In particular the magnesium perchlorate gives 10 times greater absorbance signal than the magnesium sulphate in the same concentration. The absorption of sulphur dioxide from air in hydrogen peroxide gives sulphuric acid, which can be determined by the previously mentioned method. The detection limit of the new method for sulphuric acid is 1.5•10-6 mol/L while the range of determination for is 3•10-6 – 4.1•10-5 mol/L. Since FAAS is one of the fastest analytical methods, our indirect FAAS acid determination is capable for serial analysis. With this new method we have determined the sulphuric acid content of the atmosphere of a battery recharging facility.
Keywords:	sulphur dioxid, sulphuric acid, atomic absorption, acid determination
References:	Bond, A.M. , Willis, J,B., Atomic Absorption Spectroscopy with High Temperature Flames. Anal. Chem., 40 , 2087,1968. Jones, D.R., Manahan, S.E., Detection limits for flame spectrophotometric monitoring of high speed liquid chromatographic effluents. Anal. Chem., 48 , 1897, 1976. Jungreis, E., Kraus, S., Indirect microdetermination of cyanide by atomic absorption spectroscopy. Microchim. Acta, 1 , 413, 1976. Lin, C.I., Huber, C.O., Determination of phosphate, silicate, and sulphate in natural and waste water by atomic absorption inhibition titration. Anal. Chem., 44, 2200, 1972. Looyenga, R.W, Huber, C.O., The determination of sulfate by atomic absorption inhibition titration. Anal. Chim. Acta, 55, 179, 1971 Radojević, M., Bashkin, V.N.: Practical Environmental Analysis. Royal Soc. Chem., Cambridge, 1999. Oles, P.J., Siggia, S., Determination of micromolar quantities of primary amides by flame emission spectrometry. Anal. Chem., 46 , 911, 1974. Rose, S.A., Boltz, D.F., The indirect determination of organic compounds by atomic absorption spectrometry. Anal. Chim. Acta, 44 , 239, 1969. Smith, R.V., Nessen, M.A., Analysis of chloride in amine hydrochlorides and quaternary ammonium chlorides by atomic absorption spectroscopy. Microchem. J., 17 , 538, 1972.
*Correspondence:	Posta J., University of Debrecen, Faculty of Technology and Natural Sciences, Department of Inorganic and Analytical Chemistry, Egyetem tér 1., 4032, Debrecen, Hungary, Tel. (+ 36 52) 512-900/22487, Fax. (+ 36 52) 489-667, email: postaj@tigris.unideb.hu