A gas chromatograph which divides the effluent stream from its column into two portions. One portion is for obtaining a conventional record with peaks which indicate the various compounds in the effluent of the colunn. The other portion of the divided effluent is directed through a nozzle and against a strip, that may be coated, for retaining the effluent while the strip is moved in synchronism with the conventional record. The strip may be matched against the record afterward so that individual peaks may be identified by direct analysis of the trapped effluent on the strip.