It has been 23 years (as we type) since Carroll and Holloway published the “Volatiles in Magmas” MSA volume (Carroll and Holloway 1994). The 1994 volume dealt with how to safely sample high-temperature gases and analytical methods for volatiles in glasses, which included secondary ion mass spectroscopy and vibrational spectroscopy. Since that time, some things have changed, and some have remained the same. There is still a disconnect between laboratory models of high-temperature gas–solid processes and field observations (Cashman et al. 2017), but we are starting to close that gap with rapid advances in technology. There...

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