Why do peaks in blank appear smaller when a sample is present in the same diluent solvent?

I'm running acetone. It appears to have a small amount of methanol and toluene. Exactly the thing I'm looking for in the sample. When I run the acetone blank and then run the sample in the same acetone the peaks don't like exactly the same. They are smaller. Why is this? Even the main solvent peak is broader in the blank. Any help appreciated 

Parents Reply Children
No Data
Was this helpful?