Determine of copper metal in cooking oil by saponification method with atomic absorption spectrophotometer (AAS)
DOI:
https://doi.org/10.11113/mjfas.v10n4.270Keywords:
Cooking oil, Saponification, Cu, DestructionAbstract
A research on the analysis of copper metal in the cooking oil saponification by AAS method. This study aimed to validate analytical methods, including precision and accuracy in the determination of copper metal in cooking oils through saponification and knowing destructed Cu content in cooking oils on the market. This research was done by creating a simulation of cooking oils and then added with a solution with various concentrations of Cu2+, reacted with KOH for saponification, then destructed dried, and absorbance was measured using an atomic absorption spectrometer. Results of accuracy (recovery) be obtained average of 96.88, 97.35, and 97.36% and precision values of 0.8233, 0.3154, and 0.4803%. It can be concluded that this method is very well used to determine the concentration of copper metal contained in cooking oils, and Cu content in cooking oils on the market for bulk cooking oil 1 at 11.5 mg/kg, bulk cooking oil 2 at 10.9 mg/kg, and for branded cooking oil at 7.4 mg/kg.
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GRAPHICAL ABSTRACT
References
Anonim. Statistik Indonesia, Biro Pusat Statistik, Jakarta, 1994.
Bargemann, D., Smolders, C.A. Liquid Membranes, Synthesis Membranes Science, Engineering and Applications, D. Reidel publishing Company, 1986, 567-579.
Cantle, J.E. Techniques and Instrumentation in Analytical Chemistry, Atomic Absorption Spectrometry, Volume 5, Elsevier Scientific Publishing Co., Amsterdam, 1982.
Christian, D., Gary. Analytical Chemistry, John Wiley and Sons Inc., New York, 1994.
Darmono. Logam dan Sistem Biologi Makhluk Hidup, Universitas Indonesia Press, Jakarta, 1995.
Greenberg, A.E., Lenore,S.C., Andrew, D.E. Metals by Electro Thermal Atomic Absorption Spectrometry in Standard Methods for Examination of Water and Water Waste, 18th Edition, American Public Health Association, Washington, 1992.
Kuslan. Aditif Makanan, Majalah Departemen Kesehatan RI No.15 Tahun IV, 1985.
Noerdin, D. Hidrogen Peroksida sebagai Pengoksida Basah pada Analisa Renik Bahan Organik, Departemen Kimia ITB, Bandung, 1982.
Palar, H. Pencemaran dan Toksikologi Logam Berat, Rineka Cipta, Jakarta, 1994.
Robinson, Trevor. Kandungan Organik Tumbuhan Tinggi,Penerbit ITB, Bandung, 1991.
SNI, 01-3741-2002, Syarat Mutu Minyak Goreng, Badan Standardisasi Nasional.Jakarta.
Sujalmi. Penentuan Renik Logam Berat dalam Minyak DaunCengkeh Hasil Industri Rakyat, Departemen Kimia ITB, Bandung, 1985.
Sukardjo. Kimia Koordinasi, Bumi Aksara, Jakarta, 1985.
