evka.dvor...@gmail.com wrote:
} Hello.
} We're using Agilent 6890, 7890 with MS 5973A. Method is focused on
} testing alkylated benzenes, naphthalens and PAHs. After full
} maintainance what is shortening column, changing liner, cleaning
} multiplier and changing filaments peaks start splitting. This problem
} occurs only on front analytes what are very volutile compounds. The
} rest of the run is ok. Calibration standards are prepared in hexane.
} Tailing and splitting of peaks occurs in these compounds.  Samples and
} QC(fortified blank) are prepared in pentane. Responses are low
} especially in front compounds.Differences in responses between using
} pentane and hexane are huge. If you know anything about this problem
} we'd appriciate any help.
} Thanks
} Eva
}