Which device is a high-pressure mass spectrometer used to identify traces or vapors, including drugs, explosives, and chemical warfare agents?

• A. MX908
• B. MiniRAE 3000
• C. QRAE
• D. ToxiRAE

Answer: (A)

Mass spectrometry identifies chemicals by measuring the mass-to-charge ratios of ionized molecules, allowing precise identification of compounds present in very small, trace amounts. A high-pressure mass spectrometer is built to sample air directly and rapidly identify a wide range of substances, including drugs, explosives, and chemical warfare agents, by matching the detected ion patterns to known spectra. Among the options, the device described fits this role best because it is designed for trace- vapor analysis using mass spectrometry, giving specific identifications of substances’ chemical signatures.

The MiniRAE 3000, in contrast, uses a photoionization detector to detect VOCs by concentration levels rather than identifying exact compounds. The QRAE and ToxiRAE are multi-gas detectors that rely on sensors (electrochemical, infrared, etc.) to indicate the presence of particular gases, not to perform spectrum-based identification.