@article {Brazinha2010,
	title = {{On-line and real-time monitoring of organophilic pervaporation by mass spectrometry}},
	journal = {Journal of membrane science},
	volume = {347},
	year = {2010},
	note = {<p>n/a</p>
},
	pages = {83{\textendash}92},
	abstract = {<p>This work demonstrates experimentally the use of mass spectrometry (MS) for on-line, quantitative monitoring of organophilic pervaporation processes operated not only under variable conditions of tem- perature of condensation/downstream pressure but also when using complex multi-component feed streams. Due to its high sensitivity, mass spectrometry is particularly suitable for on-line monitoring of aromas in dilute streams under reduced pressure, as happens with natural aromas in permeate streams. Mass spectrometry is also suitable for on-line monitoring of solvent and co-solvent permeants (water and ethanol in the selected case study), enabling for on-line determination of selectivity of the solutes of interest. A new method of calibration is proposed and validated, which correlates the intensity of the characteristic mass peak mi/z for each compound of interest with its partial pressure in the perme- ate stream. Moreover, mass spectrometry proves to be a powerful tool for studying the fractionation of aromas, recovered by integrated pervaporation{\textendash}condensation processes, allowing on-line monitoring of each solute vapour in the permeate stream. Additionally, this technique enables for accurate transient studies due to the possibility of acquiring one data point every 12{\textendash}15s (potentially less, if desired) in real-time.</p>
},
	keywords = {aroma, flavour recovery, fractionated condensation, organophilic pervaporation},
	doi = {10.1016/j.memsci.2009.10.009},
	author = {Brazinha, Carla and Fonseca, A P and O. M. N. D. Teodoro and Crespo, Jo{\~a}o G}
}
