Chlorofluorocarbons (CFCs) such as F3CCCl3 are implicated in the decomposition of stratospheric ozone. Which of the following methods would be best suited to measurement of trace amounts (sub-ppb) of CFCs in an air sample?
(A)Gas chromatographic separation of the air sample on a capillary column followed by electron capture detection (B)Gas chromatographic separation of the air sample on a packed column followed by thermal conductivity detection (C)Gas chromatographic separation of the air sample on a capillary column followed by flame ionization detection (D)Conversion of the sample of the chlorinated compounds to chloride ions, followed by titration with Ag+
A