Between sample injections, some students clean a microsyringe ...

[jparksx]

Between sample injections, some students clean a microsyringe with acetone rather than with
  the mixture to be analyzed. Why is this a poor technique?

Question 2

The RT for cyclohexane on a GC instrument is 0.75 min. The temperature of the GC is 70C
  and the gas flow rate is 60 mL/min.
  (a) Would the RT be higher or lower if the column temperature is raised to 100C?
  (b) Would the RT be higher or lower if the flow rate is changed to 30 mL/min?

[juicepod]

Answer to Question 1

Acetone will also exhibit a GC peak

Answer to Question 2

(a) Lower.
(b) Higher.

[jparksx]

TYSM

[okolip]

Great answer, keep it coming