Having problems with getting peak area %RSD on QL ~1ppm under 10% for phenanthrene on new Clarus 600. I have two other GC/MS (Agilent and Shimadzu)that this works on. Split/Splitless values seem to be the same and changes in the method aren't helping. Any MS parameters or injection techniques any one knows of that may help me get a little better area reproducibility? Thanks to all who take the time to respond!