Answer Posted / gaurav khurana
Gc and gchs both are used for residual solvent but difference between gc sample completely dissolve in base solvent(dmso, dmf,nmp) and clearly soluble. But gchs samples not necessary dissolve in base solvent but we check residual solvent in substance. Because gchs in headspace only vapour transfer in gc .Sample is not direct impact in injector port.But direct sample inject in injector port in gc .These is damage injector port of gc.
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