Determine countermeasures for helium gas consumption

STEP 1. Check if your system is compatible with alternative carrier gases

Check the carrier gas compatibility table below to see if your system is compatible.

*1. Pretreatment equipment, GC/GCMS main unit, and detector must all be compatible with the alternative carriers.
*2. Information on whether alternative carrier gases are applicable for each device is current as of August 31, 2022.

 

1. Common pretreatment equipment for GC and GCMS

Pretreatment equipment He H2 N2
AOC-30/20, AOC-6000/5000
HS-20 Series, HS-10
TD-30/20
Aqua PT6000/PT7000
PY-3030D/PY-2020iD
Non-used

 

The main unit differs between GC and GCMS. Please select from the links below.

2. GC

GC He H2 N2
Nexis GC-2030
GC-2014
GC-2025
GC-2010 Series
GC-8 Series
GC-14 Series
GC-17 Series

3. Detector

Detector He H2 N2
FID (packed/capillary)
TCD (packed/capillary)
FPD (packed)
FPD (capillary)
ECD (packed)
ECD (capillary)
FTD (packed/capillary)
BID
SCD

 

4. GCMS

GCMS He H2 N2 N2 (Waiting)
GCMS-QP5050A
GCMS-QP2010
GCMS-QP2010 Plus
GCMS-QP2010 Ultra
GCMS-QP2010 SE
GCMS-QP2020 Series
GCMS-TQ Series

 

 

STEP 2. Choose countermeasures

Please use the flowchart below to identify your first choice.

Choose countermeasures

 

STEP 3. Check the merits and demerits

Each gas has advantages and disadvantages. Please check the table below for details.
Please note that the degree of influence of the carrier gas type varies depending on the actual application.

  He H2 N2
Sensitivity    GC 
Compared to He, the change in sensitivity of each detector is different. For FIDs, the change in sensitivity is small.
Occasionally reacts with measurement compounds due to its reducing nature
 GCMS 
About 1/3 to 1/5 compared to He
 GC 
Compared to He, the sensitivity change of each detector is different. For the FIDs, the change in sensitivity is small. However, a TCD desensitizes rapidly
 GCMS 
High noise level, about 1/10 compared to He
Resolution   High-speed analysis is possible
Separation characteristics similar to He
Requires long analysis time for better degree of separation
Price Increasing prices and prolonged delivery time Affordable and stable
No need to manage cylinders if a hydrogen generator is installed
Relatively cheap and stable
Safety Non-explosive inert gas Flammable (explosive) gas
Safety considerations such as appropriate exhaust ventilation and H2 leakage control are necessary
Non-explosive and safe
Column  GC 
Supports up to 0.53 mm dia column 
Compatible with packed columns
 GCMS 
Supports up to 0.53 mm dia column
 GC 
Supports up to 0.53 mm dia column
Compatible with packed columns
 GCMS 
0.18 mm dia column or less is good
 GC 
Supports up to 0.53 mm dia column
Compatible with packed columns
 GCMS 
0.18 mm dia column or less is good