26. Which of the following statements concerning gas chromatography (GC) are INCORRE CT?
(A) The split injection is selected when the concentration of the target analyte in the sample is attrace level.
(B) GC combined with a flame-ionization detector is used extensively for the detection ofhydrocarbons.
(C) GC in conjugation with a thermal-conductivity detector is useful for the analysis of a mixture ofgases
(D) A polydimethylsiloxane-based polymer is heavily used as a stationary phase in GC.