« Previous AbstractSex attractants for Geometrid and Noctuid moths : Field trapping and electroantennographic responses to triene hydrocarbons and monoepoxydiene derivatives    Next AbstractPopulation Density Modulates the Duration of Reproduction of C. elegans »

Talanta

Title:		A preconcentrator chip employing mu-SPME array coated with in-situ-synthesized carbon adsorbent film for VOCs analysis
Author(s):		Wong MY; Cheng WR; Liu MH; Tian WC; Lu CJ;
Address:		"Department of Chemistry, Fu-Jen Catholic University, New Taipei City, Taiwan"
Journal Title:		Talanta
Year:		2012
Volume:		20121008
Issue:
Page Number:		307 - 313
DOI:		10.1016/j.talanta.2012.09.031
ISSN/ISBN:		1873-3573 (Electronic) 0039-9140 (Linking)
Abstract:		"We report the design, fabrication, and evaluation of a mu-preconcentrator chip that utilizes an array of solid-phase microextraction (SPME) needles coated with in-situ-grown carbon adsorbent film. The structure of the SPME needle (diameter=100 mum, height=250 mum) array inside the sampling chamber was fabricated using a deep reactive-ion etching (DRIE) process to enhance the attachable surface area for adsorbent film. Heaters and temperature sensors were fabricated onto the back of a mu-preconcentrator chip using lithography patterning and a metal lift-off process. The devices were sealed by anodic bonding and diced prior to the application of the adsorbent film. An adsorbent precursor, cellulose was dissolved in water and dynamically coated onto the SPME needle array. The coated cellulose film was converted into a porous carbon film via pyrolysis at 600 degrees C in a N(2) atmosphere. The surface area of the carbon adsorbent film was 308 m(2)/g, which is higher than that of a commercial adsorbent Carbopack X. A preconcentration factor as high as 13,637-fold was demonstrated using toluene. Eleven volatile organic compounds (VOCs) of different volatilities and functional groups were sampled and analyzed by GC-FID, and the desorption peak widths at half height were all less than 2.6 s after elution from a 15m capillary GC column. There was no sign of performance degradation after continuous operation for 50 cycles in air"
Keywords:
Notes:		"PubMed-not-MEDLINEWong, Ming-Yee Cheng, Wei-Rui Liu, Mao-Huang Tian, Wei-Cheng Lu, Chia-Jung eng Netherlands 2012/11/20 Talanta. 2012 Nov 15; 101:307-13. doi: 10.1016/j.talanta.2012.09.031. Epub 2012 Oct 8"