Selection of BVOCs emitted by H. halimifolium.

5 min-averaged emission rates [pmol m-2 s-1] of 15 individual plants in the morning (11 a.m.) under controlled conditions. The m/z, assigned species and their molecular mass are given. Calibration was performed via calibration gas (gaseous), liquid solution (liquid) or via transmission. Some compounds were cross-validated via GC and the match factor given (NIST17 mass spectral library), were nd–not detectable in GC spectra, na–not analyzed. The GC Match for monoterpenes and sesquiterpenes refers to α-pinene and β-caryophyllene. n = 15± standard error (SE). Sensitivities are exemplary shown at a humidity level of 8000 ppm and limits of detection (LODs) are set to 3σ.