Abstract
This paper reports the development of a method for simultaneously measuring zeolite, silicate, and phosphate in laundry detergent products by inductively coupled plasma atomic emission spectrometry. A sample is decomposed under alkaline oxidative conditions to decompose zeolite, silicate, phosphate, and organic substances. Then hydrochloric acid is added to the decomposed solution to dissolve aluminum hydroxide precipitate before analysis. This sample preparation procedure was investigated by using a total organic carbon analyzer and was confirmed to be applicable to simultaneous measurements of zeolite, silicate, and phosphate. Relative standard deviation for the analysis is less than 2.1%, recovery is more than 99.0%, and the calibration curve gives a correlation coefficient ofR=1.000. The detection limit of this method for aluminum and silicon is 0.1%, and for phosphorus, 0.2% by weight in the product. This method is applicable to various laundry detergent products that contain zeolite, silicate, or phosphate and is five times faster than the three wet chemical methods.
Similar content being viewed by others
References
Falbe, J. (ed.)Surfactants in Consumer Products, Springer-Verlag, Berlin, 1987.
Jakobi, G., and A. Lohr,Detergents and Textile Washing, VCH, Weinheim, 1987.
Tadros, T.F. (ed.)Surfactants, Academic Press, Orlando, 1984.
Fujii, T.,Senzai, Saiwai Shuppan, Tokyo, 1991.
Japanese Industrial Standard (JIS) K3362,Testing Method for Synthetic Detergent, Japanese Industrial Standard Committee, Tokyo, 1990.
Tominaga, H. (ed.)Zeolite no kagaku to ouyou Kodansha Scientific, Tokyo, 1987.
Hara, N., and H. Takahashi (eds.)Zeolite-kiso to ouyou, Kodansha Scientific, Tokyo, 1975.
Endoh, H., M. Ozaki, and Y. Kondoh,J. Jpn. Oil Chem. Soc. (Yukagaku) 42:507–512 (1993).
Koroleff, F.,Determination of Total Nitrogen in Natural Waters by Means of Persulfate Oxidation, International Council for the Exploration of the Sea (ICES), Paper C8, 1969.
Miller, J.C., and J.N. Miller,Statistics for Analytical Chemistry, Japanese version, Kyoritsu-shuppan, Tokyo, 1991, pp. 114–117.
Haraguchi, H.,ICP hakkoubunseki no kiso to ouyou, Kodaysha, Tokyo, 1986.
Author information
Authors and Affiliations
About this article
Cite this article
Kawauchi, A., Ishida, M. Measurement of zeolite, silicate, and phosphate in laundry detergent products by inductively coupled plasma atomic emission spectrometry. J Am Oil Chem Soc 73, 131–135 (1996). https://doi.org/10.1007/BF02523460
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02523460