chemist23 wrote:
Hi,
I am attempting to perform a linearity check using an Agilent GC-MS:7890B/5977B, by injecting 0.2, 0.4, 0.6, 0.8, 1.0 uL/mL solutions of 1-octanol. My R^2 is 0.98.
Other than solution preparation errors, what else could affect linearity on a GC-MS system?
ul/ml?
Would that make the solution concentrations .166mg/ml, .332mg/ml, .498mg/ml, .664mg/ml and .830mg/ml?
That makes the low standard 166ppm and the high standard 830ppm
What is the injection solvent?
Are you doing a split injection and what is the size of your column?
With a 1:5 split I have some analytes max out by the time they are at 100ppm, it could be column or detector overload unless you are using a fairly high split injection.