Diverse Applications of Membrane Extraction in Real-time Water
Monitoring
Ken Gethard, Ornthida Sae Khow, D. Kow and Somenath Mitra
New Jersey Institute Of Technology, Newark, New Jersey 07102.
Department of Chemistry and Environmental Science
Abstract
The increasing needs for inexpensive, real-time monitoring devices have added new
impetus to developing chemical analysis systems that integrate sampling, sample
preparation and detection. One way to enhance sensitivity in these measurements is to
provide concentration, and/or extraction along with other functionalities. The goal is to
integrate these components to develop total analytical systems for on-line, real-time
analysis
This presentation covers some recent developments in our group including
membrane sampling and microconcentration techniques (1-4). The water monitoring
devices developed here can be used as, laboratory instruments, field analytical and as online monitoring devices. Applications in the monitoring of different classes of compounds
are covered that include volatile organics, semi-volatile organics, haloacetic acids,
pesticides, pharmaceutical products and metals. Microfabricated devices using MEMS
technology have also been developed, which can lead to miniaturization.
References:
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“Automated analysis via membrane extraction”. K. Hylton and S. Mitra. In Press, J. of
Chromatogr. (A), 2007, doi:10.1016/jchroma.2006.12.04.
“Development of supported liquid membrane microextraction for the trace determination of
haloacetic acids”. D. Kou and S. Mitra, J. of Chromatogr. A, 1055, 63-69 (2004).
“Gas Injection Membrane Extraction with Fast On-line Analysis with GC Detection”. D. Kou, A.
San Juan and S. Mitra, Anal. Chem., 73-22, 5462, (2001).
“Development of total analytical system by online Coupling of Membrane Extraction with
Membrane Pervaporation”. Xiaoyan Wang and Somenath Mitra. J. of . Chromatogr. A. 1068, 237242 (2005).