Practice question

An ionization potential (IP) value is relevant when using a PID because:

  1. A compound is detectable only if its ionization potential is below the energy of the PID lamp
  2. It tells the boiling point
  3. It measures the pH of the gas
  4. It indicates the radioactivity

Answer: A — A compound is detectable only if its ionization potential is below the energy of the PID lamp

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