Abstract: The present paper describes the method using Off-Line Type PDP11/03 Compter withsoftware in Basic Language to process photoplate of isotope dilution-spark source massspectrometry for quantitative analysis. the programs have many operational modes whichpermit to perform variety of calculations, such as half-quanti-tative analysis, internalstandard, isotope dilution, and to perform data statistics processing. Lastly, computerprinted output can be used directly as the analytical report to customer.