Table of Contents

Installation of Capillary Column (Graphite Ferrule)

Video (Installation of Graphite Ferrule to Column)¶

Video (Installation of Column to GC)¶

Required devices¶

No.	Parts name	Category	Required number
①	10x12 Spanner	Other	1
②	6x8 Spanner	Other	2
③	Tweezers	Other	1
④	Cutter, Capillary Tube	Parts for Capillary Column Connection	1
⑤	Non Slit Nut	Parts for Capillary Column Connection	1
⑥	Slit Nut	Parts for Capillary Column Connection	1
⑦	Graphite Ferrule	Parts for Capillary Column Connection	2
⑧	Graphite jig (INJ)	Parts for Capillary Column Connection	1
⑨	Graphite jig (DET)	Parts for Capillary Column Connection	1

Hint

A graphite ferrule that matches the inner diameter of the column must be selected.
Refer to Ferrule Type .
Note that this procedure cannot be used for GCMS.

Procedures¶

Step 1¶

Stop the instrument. Then, on the instrument monitor or workstation, check that the temperature of the column oven is lower than 40 °C, check that the temperatures of the injection port and detector are 50 °C or lower, and check that the gas supply is stopped and there is no residual pressure.

Step 2¶

Slide the injection port side of the column through the column nut (without slit) (⑤), and then through the graphite ferrule (⑦).

Hint

Organic matter easily adheres to graphite. If you directly touch graphte ferrule, it may affect the analytical data.

Step 3¶

Fix the graphite ferrule temporarily with the Graphite jig (⑧) and a 6×8 spanner (②).

In this case, push out capillary column about 10 mm from the Graphite jig.

Hint

When using Graphite jig for SPL/PTV, the sealed end of the graphite ferule is fixed at 34 mm from the column end.
When performing splitless analysis using a wide bore column with an inner diameter of 0.53 mm, use the Graphite jig and WBI so that the sealed end of the graphite ferrule is fastened at 15 mm from the column end.

Step 4¶

Cut the end of column with capillary cutter (④) etc.

Note

Cut the column so that the end becomes flat.

When the graphite excess into the graphite adjuster, remove the entered graphite with tweezers, etc.
Caution should be exercised not to damage the column.

If the column is installed while excess graphite is still attached onto the graphite adjuster is not removed, the graphite may remain and cause clogging in the capillary adapter after you remove the column. When the graphite is clogged, disconnect the capillary adopter and remove the clogging with thin cotton swabs, etc.

Step 5¶

Prepare the detector side of the column in the same way.

Normally, a nut with slit is used on the detector side, therefore, fix only the graphite ferrule with the Graphite jig (⑨). (If analyses are performed with column temperature set at more than 350 °C, thermal capacity may need to be reduced by using a small nut without slit, which is the same as the injection port side.)

Hint

The position where the graphite ferrule is fixed depends on the detector to be used.
Fix the graphite ferrule with the adjuster for each detector.

GC-2030

Detector	Position	Note
FID	72 mm	When using metal capillary, 7 to 8 mm shorter.
TCD	50 mm
FPD	82 mm
FTD	69 mm	When using metal capillary, 2 to 3 mm shorter.
BID	74 mm
ECD(Flow path A)* Column flow rate is less than 2 mL/min	43 mm	Graphite ferrule jig, ECD_43mm P/N 221-48610-07 is used.
ECD(Flow path A)* Column flow rate is more than 10 mL/min	38 mm	When the column flow rate is 2 mL/min or more, make the length of the inserted column shorter than 43 mm to improve the durability of ECD cell (Example: when the column flow rate is 2 to 10 mL/min, 41 mm). Adjust the length of the inserted column because optimal length depends on analytical settings and the sample.If you want to adjust the column insertion length other than 43mm, use the graphite ferrule jig, ECD_43mm P/N 221-48610-07 to fix the ferrule, then shift the position of the ferrule to adjust.
ECD(Flow path B)*	32mm	Graphite ferrule jig, ECD_32mm P/N 221-48610-04 is used.

*Method for distinguishing the different ECD flow paths
ECD-2010 Exceed column insertion length differs depending on the flow path.
Refer to ECD-2010 Exceed Method for distinguishing the different ECD flow paths to determine the flow path.

GC-2050