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MMLU / Chlorofluorocarbons (CFCs) such as F3CCCl3 are implicated in the decomposition…

Problem

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question

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?

choices

  1. Gas chromatographic separation of the air sample on a capillary column followed by electron capture detection
  2. Gas chromatographic separation of the air sample on a packed column followed by thermal conductivity detection
  3. Gas chromatographic separation of the air sample on a capillary column followed by flame ionization detection
  4. Conversion of the sample of the chlorinated compounds to chloride ions, followed by titration with Ag+

subject

college_chemistry

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