Equivalent dose determination by the additive dose method applied to the infrared stimulation of feldspar has been shown to be possible with a single aliquot of sample and an appropriate method of data analysis [Duller G. A. T. (1991) Equivalent dose determination using single aliquots. Nucl. Tracks Radiat. Meas. 18, 371-378]. An alternative method of analysis of the single aliquot data is presented which may offer some advantages.