Dynamic Sampling Method for Diacetyl and Acetoin Using Tenax TA Solid Sorbent and (2,3,4,5,6-Pentafluorobenzyl) Hydroxylamine Hydrochloride (PFBHA). (48) S. Takaku, S. Que Hee, University of California, Los Angeles, Los Angeles, CA.

An Alternative to Thermosorb/N and GC-TEA for Nitrosamines Determination in Workplace Air. (49) S. Aubin, L. Locas, S. Paradis, IRSST, Montr�al, QC, Canada.

Passive Air Sampling for Nonylphenol by Solid-Phase Microextraction. (50) M. Hsiao, S. Tsai, National Taiwan University, Taipei, Taiwan.

Optimizing Sampling and Analytical Parameters for Soil Vapour Samples Using Automated Thermal Desorption/Gas Chromatography/Mass Spectrometry
(ATD/GC/MS). (52) S. Varisco, CARO Analytical Services, Richmond, BC, Canada; L. Marotta, PerkinElmer LAS, Shelton, CT; M. Snow, PerkinElmer LAS, Woodbridge, ON, Canada.

Pesticide Evaluations Using Thermal Desorption Gas Chromatography/Mass Spectrometry. (53) S. VanEtten, V. Daliessio, EMSL Analytical, Westmont, NJ; L. Marotta, Perkin Elmer, Shelton, CT.

Occupational Exposure to Organophosphates Originating From Hydraulic Fluids. (54) P. Molander, K. Solbu, S. Thorud, D. Ellingsen, National Institute of Occupational
Health, Oslo, Norway; E. Lundanes, University of Oslo, Oslo, Norway.

Simultaneous Assessment of Vapor and Particle Concentrations Using a Semivolatile Aerosol Dichotomous Sampler. (55) S. Kim, P. Raynor, University of Minnesota,
Minneapolis, MN.