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. 2017 Apr 17;79(5):36. doi: 10.1007/s00445-017-1114-z

Table 2.

Molar H2S/SO2 ratios (and range) at Mt. Etna reported from this and previous studies

H2S/SO2 molar ratio Method
This study 0.02 (0.01–0.03) Multi-Gas
Aiuppa et al. (2011) 0.007 (0.0046–0.01) Multi-Gas
Aiuppa et al. (2007b) 0.02 Diffusion tube (bulk plume)
0.01 Filter pack at VOR
0.05 Filter pack at NEC
0.02 Bulk plume (1:1 VOR:NEC)
Aiuppa et al. (2005a) 0.05 (0.04–0.07) Filter pack