Direct Determination of Manganese in Biological Materials Using Electrothermal Atomization Atomic Absorption Spectrometry with a Molybdenum Tube Atomizer

Abstract

A method is described for the direct determination of manganese in biological samples utilizing electrothermal atomization atomic absorption spectrometry with a molybdenum tube atomizer and a matrix modifier. The atomization characteristics of manganese were evaluated in a mixture purge gas of argon and hydrogen. A direct calibration method with manganese standard solutions and an ultrasonic agitation method of a solution containing sample powder were used. The interference caused by large amounts of interferents was investigated, and eliminated by the addition of thiourea. Biological samples were directly analyzed with satisfactory results.