A computer-controlled geochemical analysis system for use with existing Perkin Elmer double-beam atomic absorption spectrophotometers

A system is described for the automated analysis of trace and major elements in geochemical samples. The signal at the photomultiplier tube of a Perkin Elmer model 303 double-beam atomic absorption spectrophotometer is decoded and digitized in a locally designed interface unit and input to a Texas Instruments model 960A minicomputer. This controls an automatic sampler and provides a computer compatible tape and printout of analytical data in concentration units for up to 200 samples in a run.