GC$-$MS: Gas Chromotograph $-$ Mass Spectrometry

Explain all the steps and roles used in QuEChERs

$+$ What is the purpose of a Bond Elut AOAC QuEChERs packet?

$+$ Why do we have to add the packet into a sample?

$+$ What is the purpose of a Bond Elute AOAC dispersive SPE $15$ mL tube?

$+$ Why do we have to use it$?$ How are ions generated in GC$-$MS$?$

How would increasing the temperature of the oven alter the analysis?

What is split and splitless injection referring to$?$

This experiment is a suspect screening, where we determine if a target analyte is present$/$absent$.$ How would we perform quantification? $($ Target analyte: identify the unknow pesticide was added in the Thyme sample$)$

What are the isotopes of chlorine and why is it important for the analysis? Why does a single compound produce multiple m$/$z peaks?