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- [31] Flame Atomic Absorption Spectrometric Determination of Trace Amounts of Manganese in Alloys and Biological Samples after Preconcentration with the Ion Pair of 2-(5-Bromo-2-pyridylazo)-5-diethylaminophenol and Ammonium Tetraphenylborate on Microcrystalline Naphthalene or by Column Method Analytical Sciences, 2001, 17 : 969 - 973
- [32] Flame atomic absorption spectrometric determination of trace amounts of manganese in alloys and biological samples after preconcentration with the ion pair of 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol and ammonium tetraphenylborate on microcrystalline naphthalene or by column method ANALYTICAL SCIENCES, 2001, 17 (08) : 969 - 973
- [34] Derivative spectrophotometric determination of trace lead in alloys and biological samples after separation and preconcentration with the ion pair of 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol and ammonium tetraphenylborate on microcrystalline naphthalene or by column method BULLETIN OF THE CHEMICAL SOCIETY OF ETHIOPIA, 2003, 17 (02) : 129 - 138