Table 1 Side-by-side performance comparison between conventional DCS and QEMR-PAS
From: Quartz-enhanced multiheterodyne resonant photoacoustic spectroscopy
Techniques | Detector Type | Spectral coverage of detector (μm) | Dyna-mic range (dB) | Spectral resolution (GHz) | Avera-ging time (s) | Detection limit (ppm) | NEA (cm−1·Hz-1/2) |
|---|---|---|---|---|---|---|---|
NIR-DCS38 | InGaAs | 0.8-1.6 | 27 | 1 | 0.0025 | C2H2: 364 | 3.39 × 10−6 |
MIR-DCS39 | HgCdTe | 3–10 | 22 | 0.5 | 2 | Mixture: - | 6.40 × 10−6 |
DC-PAS24 | Microph-one | All band | 45 | 1 | 1000 | C2H2: 10 | 2.90 × 10−5 |
QEMR-PAS | QTF | All band | 60 | 0.043 | 9.6 | C2H2: 4 | 5.99 × 10−6 |
