Helium Saver Mode With Nitrogen Make-Up Cooling Gas for GC-MS With Cold EI.

Area of Science:

• Analytical Chemistry
• Gas Chromatography Mass Spectrometry (GC-MS)

Background:

• Cold EI typically uses helium for carrier and cooling gases.
• Nitrogen or hydrogen are alternatives if helium is unavailable, but pose challenges like decomposition or reduced separation.
• Optimizing gas usage in GC-MS is crucial for cost and sustainability.

Purpose of the Study:

• To describe a novel method for reducing helium consumption in cold EI.
• To evaluate the performance of using nitrogen as a cooling make-up gas.
• To maintain analytical efficiency while conserving helium.

Main Methods:

• Implementing a
• Helium Saver
• mode using helium as the column carrier gas.
• Utilizing nitrogen as the cooling make-up gas.
• Comparing analytical results and gas consumption with standard EI methods.

Main Results:

• The
• Helium Saver
• mode maintains helium consumption similar to standard EI during analysis.
• Nitrogen can be used as a cooling make-up gas without compromising separation.
• Nitrogen can also be employed in stand-by mode for additional helium savings.

Conclusions:

• The described method effectively reduces overall helium usage in cold EI.
• This approach offers a practical solution for helium supply interruptions and cost reduction.
• It enables sustained analytical performance while enhancing gas conservation strategies.