TY - JOUR
T1 - A microfluidic hollow fiber membrane extractor for arsenic(V) detection
AU - Hylton, Kamilah
AU - Mitra, Somenath
N1 - Funding Information:
This work was made possible by funding from the New Jersey Water Resources Research Institute (NJWRRI). We would also like to thank Jack Gidney for machining the channels.
PY - 2008/1/21
Y1 - 2008/1/21
N2 - Microfluidic membrane extraction using a conventional hollow fiber membrane is presented for continuous, on-line extraction of arsenic. Previously reported micro-scale devices used flat membranes. These modules were relatively complex, difficult to seal, and high pressure drops made them prone to leaks. The present design is simpler, has higher active surface area per unit volume, and allows faster flow rates leading to enhanced mass transfer. On-line membrane extraction of As(V) via chelation through a supported liquid membrane was followed by conventional colorimetric detection with a UV-vis spectrophotometer. Enrichment factors were close to 30, and the detection limit was 27 μg L-1. The extraction was linear and reproducible. The relative standard deviation of six repeat extractions was less than 3%.
AB - Microfluidic membrane extraction using a conventional hollow fiber membrane is presented for continuous, on-line extraction of arsenic. Previously reported micro-scale devices used flat membranes. These modules were relatively complex, difficult to seal, and high pressure drops made them prone to leaks. The present design is simpler, has higher active surface area per unit volume, and allows faster flow rates leading to enhanced mass transfer. On-line membrane extraction of As(V) via chelation through a supported liquid membrane was followed by conventional colorimetric detection with a UV-vis spectrophotometer. Enrichment factors were close to 30, and the detection limit was 27 μg L-1. The extraction was linear and reproducible. The relative standard deviation of six repeat extractions was less than 3%.
KW - Arsenic
KW - Membrane extraction
KW - Microfluidic
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U2 - 10.1016/j.aca.2007.11.039
DO - 10.1016/j.aca.2007.11.039
M3 - Article
C2 - 18155408
AN - SCOPUS:37449015223
SN - 0003-2670
VL - 607
SP - 45
EP - 49
JO - Analytica Chimica Acta
JF - Analytica Chimica Acta
IS - 1
ER -