Complex sentence: One of the key advantage of oa-TOFMS with EI sources is for deployment with gas chromatographic (GC) inlet systems, which allows chromatographic separation of volatile organic compounds to proceed at high speed.
Split into simpler sentences: One of the key advantage of oa-TOFMS with EI sources is for deployment with gas chromatographic (GC) inlet systems. Due to this reason, chromatographic separation of volatile organic compounds can now proceed at high speed.