19 Troubleshooting
19.1 Troubleshooting
316
GC-2010 Plus
19.1.4.4 Poor retention time reproducibility
If the gas supply pressure is fluctuating due to failure of the gas cylinder pressure
regulator, repair or replace it. Contact your Shimadzu representative.
19.1.4.5 Poor peek area reproducibility
If the gas supply pressure is fluctuating due to failure of the gas sylinder pressure regu-
lator, repair or replace it. Contact your Shimadzu representative.
Possible Cause Solution
The carrier gas cylinder is almost empty.
Replace the gas cylinder with one of at least 3 MPa
pressure.
Carrier gas flow rate is fluctuating due to a gas leak.
Tighten leaking connections.
Replace tubing or septum.
Column is overloaded.
Decrease sample size.
Dilute sample.
Increase split ratio.
Use a column with a thicker film.
Room temperature is not within the recommended
range or is considerably fluctuating.
Keep the room temperature within the recommended
range or reduce temperature fluctuations.
Syringe tip is clogged, and sample is not properly
injected.
Clean or replace syringe.
Possible Cause Solution
The carrier gas cylinder is almost empty.
Replace the gas cylinder with one of at least 3 MPa
pressure.
Carrier gas flow rate is fluctuating due to a gas leak.
Tighten leaking connections.
Replace tubing.
Sample is not injected completely.
Perform injections accurately.
Replace the syringe with a new one.
Column is overloaded.
Decrease sample size.
Dilute sample.
Increase split ratio.
Use a column with a thicker film.
Room temperature is not within the recommanded
range or is considerably fluctuating.
Keep the room temperature within the recommended
range or reduce temperature fluctuations.
Syringe tip is clogged, and sample cannot be aspicated
well.
Clean or replace syringe.
Syringe tip is clogged, and sample is not property
injected.
Clean or replace syringe.
Syringe plunger is stiff, and does not move
smoothly.
Clean syringe barrel and plunger.
Clean or replace syringe.
Silica wool inside glass insert is packed incorrectly. Re-pack the silica wool.
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