U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 Commodity Protection and Quality Research: Parlier, CA
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    Careers


        


                    Research Units
                        San Joaquin Valley Agricultural Sciences Center
                                    Crop Diseases, Pests and Genetics Research
                                    Water Management Research
                                    National Arid Land Plant Genetic RepositorySearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Pacific West Area Parlier, California San Joaquin Valley Agricultural Sciences Center Commodity Protection and Quality Research Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications

Title:   Author  item
                                            Walse, Spenceritem
                                            Hall Iv, Wiley
  Submitted to: International Conference on Methyl Bromide Alternatives and Emissions Reductions
                                    Publication Type: Proceedings
                                    Publication Acceptance Date: 9/18/2012
                                    Publication  Date: 11/8/2012
                                    Citation: Walse, S.S., Hall Iv, W.A. 2012. Solid phase microextraction for active or passive sampling of methyl bromide during fumigations. International Conference on Methyl Bromide Alternatives and Emissions Reductions, November 6-8, 2012, San Diego, California. p. 64:1-2.Interpretive Summary: A novel application of an analytical technique, solid phase micro extraction, was developed and tested to facilitate the quantification of gaseous methyl bromide over the course of an entire fumigation process.
                                Technical Abstract: The high diffusivity and volatility of methyl bromide make it an ideal compound for Solid Phase Micro Extraction (SPME)-based sampling of air prior to gas-chromatographic quantifications. SPME fibers can be used as active methyl bromide samplers, with high capacities and an equilibrium time of 1-2 min, or they can be used passively to determine the time weighted average methyl bromide concentration. We report the use of SPME fibers to determine the mass of methyl bromide that breaks through a sorbent column, measure the concentration of methyl bromide in the head space of a vial of methyl bromide-impregnated activated carbon, and predict the spatial distribution of methyl bromide as related to worker exposure in storage spaces following postharvest fumigation.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov