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Single‐drop liquid phase microextraction accelerated by surface acoustic wave
Author(s) -
Zhang Anliang,
Zha Yan
Publication year - 2013
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201200973
Subject(s) - drop (telecommunication) , surface acoustic wave , transducer , extraction (chemistry) , materials science , interdigital transducer , signal (programming language) , center frequency , acoustics , radio frequency , analytical chemistry (journal) , acoustic wave , chromatography , chemistry , optics , telecommunications , computer science , band pass filter , physics , programming language
A single‐drop liquid phase microextraction method is presented, in which surface acoustic wave (SAW) is used for accelerating extraction speed. A pair of interdigital transducers with 27.5 MHz center frequency is fabricated on a 128° yx ‐LiNbO 3 substrate. A radio frequency signal is applied to one of interdigital transducers to excite SAW. Plastic straw is filled with PDMS, leaving 1 mL for holding sample solution. Plastic straw with sample solution droplet is then dipping into extractant, into which SAW is radiated. Mass transportation from sample solution to extractant drop is accelerated due to acoustic streaming, and extraction time is decreased. An ionic liquid and an acid green‐25 solution are used for extraction experiments. Results show that the extraction process is almost finished within 2 min, and extraction speed is increased with radio frequency signal power.