Absolute analysis by atomic absorption

The paper describes an attempt to place atomic absorption spectroscopy on an absolute basis. Both the theoretical and experimental aspects of the problem are considered.

The study is based upon the construction of a precision burner which provides a homogeneous working zone of definite size into which the atoms to be studied are introduced. Experimental results obtained by means of this burner are used as a guide in formulating a mathematical model of the absorption process.

It is suggested that a model based upon the Voigt equation will suffice to explain the qualitative and quantitative results from an atomic absorption experiment. The extent to which inorganic compounds are dissociated in a flame, the degree of pressure broadening of an absorption line and the characteristics of the emission line from the source constitute the major unknown factors in the application of the theory.