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Abstract:
Detection of ionic current with two electrodes installed in a liquid cell has been
established previously as an e
ff
ective method, termed as total ion yield (TIY), to acquire X-ray
absorption (XA) spectra of liquid solutions behind a membrane. In this study, the exact locations where
TIY signals are generated are further investigated and unequivocally identi
fi
ed. The detected ionic
current stems dominantly from the bulk solution species while only marginally from the species located
at the membrane
−
solution interface. Such a two-electrode TIY detection in a liquid cell combines the
advantages of bulk sensitivity of
fl
uorescence yield and high signal strength (for light elements) of
electron yield, exhibiting its novel and promising role in the XA spectroscopy measurements of liquid
cells.
