Passive Sampling Techniques Episode 14 pptx

Ngày tải lên: 12/08/2014, 16:21

... microextraction and its application in passive sampling Yong Chen and Janusz Pawliszyn 1.1 INTRODUCTION Solid phase microextraction (SPME) was developed to address the need for rapid sampling/ sample preparation, ... been applied successfully to the sampling and analysis of environmental, food, pharmaceutical, and forensic sam- ples [3]. More recently it has been used in passive sam...

Ngày tải lên: 12/08/2014, 16:21

... devices combining the advantages of passive sampling approaches with solvent-free pre- concentration of organic contaminants from air, water or other matri- ces. The sampling materials are polymer-coated ... Holland, 1984. 77 A L. Sunesson, C A. Nilsson and B. Andersson, J. Chromatogr. A, 699 (1995) 203. Passive sampling in combination with TD and GC to assess chemical exposure 83 C...

Ngày tải lên: 12/08/2014, 16:21

... phase resulted in an increase in sampling rates up to a factor of 6. Decreasing sampling rates were ob- served for the 5-ring PAHs, which showed a decrease in sampling rate by a factor of 2–3 ... 10 À5 ). The use of 1-octanol as intermediate phase resulted in an approximately 20-fold increase in sampling rates compared with water as intermediate phase [5]. It should be noted again, ho...

Ngày tải lên: 12/08/2014, 16:21

... spot sampling methods that provide only an instantaneous estimate of the concen- tration of pollutants at the time and point of sampling. Amongst these alternative technologies are passive sampling ... Chapter 9 Monitoring of priority pollutants in water using Chemcatcher passive sampling devices Richard Greenwood, Graham A. Mills, Branislav Vrana, Ian Allan, Rocı ´ o Aguilar-Martı...

Ngày tải lên: 12/08/2014, 16:21

... INTRODUCTION Membrane-enclosed sorptive coating (MESCO) denotes the recently developed miniaturised passive sampling devices consisting of a mem- brane which encloses polydimethylsiloxane (PDMS) coatings ... 0.107 2.16 Acenaphthene 10 10 1172 3 0.102 12.2 Fluorene 18 9 1128 4 0.100 9.76 Anthracene 8 30 149 4 9 0.094 7.03 Phenanthrene 62 30 3128 7 0.094 15.4 Fluoranthene 13 30 3135 8 0.07...

Ngày tải lên: 12/08/2014, 16:21

... [1,2].DSs can be advantageous for sampling VOCs in ground-water primarily because they have the potential to reduce costs substantially compared with pumping approaches to well sampling. The depth-specific ... water monitoring Hansjo ¨ rg Weiß, Kristin Schirmer, Stephanie Bopp and Peter Grathwohl 12.1 INTRODUCTION Passive sampling with ceramic dosimeters allows for time-integrated monit...

Ngày tải lên: 12/08/2014, 16:21

... Chapter 15 Techniques for quantitatively evaluating aquatic passive sampling devices B. Scott Stephens and Jochen F. Mu¨ller 15.1 INTRODUCTION As the suite of available devices for passively sampling ... compounds. Most complicated and expensive to operate. [13 ,14, 31–34] Techniques for quantitatively evaluating aquatic passive sampling devices 337 TABLE 14. 2 Examples of field...

Ngày tải lên: 12/08/2014, 16:21

... sites. [17] Portsmouth Harbour Empore TM 2 2 10 14 d [33] a Not counting replicates. Techniques for quantitatively evaluating aquatic passive sampling devices 345 TABLE 15.3 High-volume solid-phase ... [52] San Francisco Estuary XAD-2 1 140 0 250 g and 2 Â 75 g 400 [41] Deep Atlantic XAD-2 GF/F 5 bed volumes [50] Techniques for quantitatively evaluating aquatic passive sampling...

Ngày tải lên: 12/08/2014, 16:21

... vapour sampling system . . . . . . 380 17.3 GORE TM modules for passive soil gas collection . . . 381 17.4 Emflux s passive soil gas sampling system 382 17.5 Semipermeable membrane devices for passive ... FOR PASSIVE SAMPLING THERMAL DESORPTION ANALYSIS There is a number of diffusion sampler designs on the market. For the combination of TD and diffusion sampling the various type...

Ngày tải lên: 28/03/2014, 18:20