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VASE - Vacuum Assisted Sorbent Extraction

Quantitative Headspace Measurement of Volatiles in Dairy Products using Vacuum Assisted Sorbent Extraction (VASE) & GCMS Analysis
Quantitative Headspace Measurement of Volatiles in Dairy Products using Vacuum Assisted Sorbent Extraction (VASE) & GCMS Analysis
The headspace analysis of some dairy products has been evaluated using a new sample preparation technique called “Vacuum Assisted Sorbent Extraction” (VASE) that improves the recovery of heavier and...
Size990.78 KB
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Last UpdatedApril 19, 2017
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    Air Sampling

    Preparing Gas Phase Standards from Neat Chemicals to Support Air Monitoring in the Workplace
    Preparing Gas Phase Standards from Neat Chemicals to Support Air Monitoring in the Workplace
    ABSTRACT An approach for generating gas phase standards to support air monitoring using the canister technique is presented. A software program called ESP 2.0 performs the calculations to prepare low to...
    Size1.02 MB
    Downloaded593 times
    Last UpdatedJanuary 26, 2017
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    Helium Diffusion Sampling for Personal Monitoring by EPA Method TO15
    Helium Diffusion Sampling for Personal Monitoring by EPA Method TO15
    ABSTRACT A new, simplified approach for filling air sampling canisters during personal monitoring of work place airborne chemicals is described. Helium Diffusion Sampling Personal Monitors (HDS-PM) are...
    Size1.02 MB
    Downloaded596 times
    Last UpdatedJanuary 26, 2017
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    Improved Performance And Dynamic Range For EPA Method TO-15 using the Entech 7200 and Agilent 7890B/5977 GCMS
    Improved Performance And Dynamic Range For EPA Method TO-15 using the Entech 7200 and Agilent 7890B/5977 GCMS
    Canister sampling and analysis for measurement of volatile chemicals is finding use in a growing number of diversified applications. This has required air laboratories to accommodate an even wider dynamic...
    Size1.96 MB
    Downloaded357 times
    Last UpdatedJanuary 26, 2017
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    Sampling with MiniCans and Bottle-Vacs
    Sampling with MiniCans and Bottle-Vacs
    ABSTRACT Canisters offer a simple and highly effective means of measuring volatile chemicals in air ranging from PPM to sub-PPB levels. The “GC grade” internal surfaces of canisters allow for a much...
    Size178.66 KB
    Downloaded318 times
    Last UpdatedJanuary 26, 2017
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    Improving the Performance of Time Integrated Sampling of TO14 Compounds into Stainless Steel Canisters
    Improving the Performance of Time Integrated Sampling of TO14 Compounds into Stainless Steel Canisters
    ABSTRACT Time integrated sampling of TO14 compounds into stainless steel canisters was evaluated under a variety of conditions. Four different flow controllers were tested at temperatures ranging from...
    Size259.23 KB
    Downloaded254 times
    Last UpdatedJanuary 26, 2017
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    Helium Diffusion Sampling for Indoor Air by EPA Method TO15
    Helium Diffusion Sampling for Indoor Air by EPA Method TO15
    ABSTRACT A new, simplified approach for filling air sampling canisters or containers during monitoring of environmental pollutants in air is described. Canisters or Bottle-Vac's are filled with helium...
    Size529.15 KB
    Downloaded250 times
    Last UpdatedJanuary 26, 2017
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    Strong similarities between night-time deposition velocities of carbonyl sulphide and molecular hydrogen inferred from semi-continuous atmospheric observations
    Strong similarities between night-time deposition velocities of carbonyl sulphide and molecular hydrogen inferred from semi-continuous atmospheric observations
    ABSTRACT We investigated the diurnal variations of atmospheric carbonyl sulphide (COS) during 2011 at Gif-sur-Yvette, a suburban atmospheric measurement site in France. These data were collected semi-continuously...
    Size1.47 MB
    Downloaded171 times
    Last UpdatedJanuary 26, 2017
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    Improving Canister Sampling Accuracy and Reliability Using Helium Diffusion Sampling into Silonite Coated Stainless Steel Canisters
    Improving Canister Sampling Accuracy and Reliability Using Helium Diffusion Sampling into Silonite Coated Stainless Steel Canisters
    A new, simplified approach for filling air sampling canisters during monitoring of Environmental pollutants in air is described. The new approach uses helium diffusion to drive the sampling process in...
    Size356.20 KB
    Downloaded244 times
    Last UpdatedJanuary 26, 2017
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    Enhanced Performance & Dynamic Range for EPA Method TO-15
    Enhanced Performance & Dynamic Range for EPA Method TO-15
    Abstract As the negative effects of low-level exposure to toxic organics in air become more evident, the push for lower detection limits continues. The result of this is more sensitive and selective detectors...
    Size318.77 KB
    Downloaded200 times
    Last UpdatedJanuary 26, 2017
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    Accurate Monitoring of Sulfur Compounds in Silonite® Fused Silica Lined Canisters Utilizing a New Approach for Water Removal During Field Sampling
    Accurate Monitoring of Sulfur Compounds in Silonite® Fused Silica Lined Canisters Utilizing a New Approach for Water Removal During Field Sampling
    Glass and Silonite® ceramic treated stainless steel canisters oer higher recoveries of TO-15 Compounds than many other sampling devices, including electropolished canisters, Tedlar® bags and thermal...
    Size125.06 KB
    Downloaded291 times
    Last UpdatedJanuary 26, 2017
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    Laboratory Air Analysis

    Improved Performance And Dynamic Range For EPA Method TO-15 using the Entech 7200 and Agilent 7890B/5977 GCMS
    Improved Performance And Dynamic Range For EPA Method TO-15 using the Entech 7200 and Agilent 7890B/5977 GCMS
    Canister sampling and analysis for measurement of volatile chemicals is finding use in a growing number of diversified applications. This has required air laboratories to accommodate an even wider dynamic...
    Size1.96 MB
    Downloaded357 times
    Last UpdatedJanuary 26, 2017
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    Improving the Performance of Time Integrated Sampling of TO14 Compounds into Stainless Steel Canisters
    Improving the Performance of Time Integrated Sampling of TO14 Compounds into Stainless Steel Canisters
    ABSTRACT Time integrated sampling of TO14 compounds into stainless steel canisters was evaluated under a variety of conditions. Four different flow controllers were tested at temperatures ranging from...
    Size259.23 KB
    Downloaded254 times
    Last UpdatedJanuary 26, 2017
    Download

    Helium Diffusion Sampling for Indoor Air by EPA Method TO15
    Helium Diffusion Sampling for Indoor Air by EPA Method TO15
    ABSTRACT A new, simplified approach for filling air sampling canisters or containers during monitoring of environmental pollutants in air is described. Canisters or Bottle-Vac's are filled with helium...
    Size529.15 KB
    Downloaded250 times
    Last UpdatedJanuary 26, 2017
    Download

    Strong similarities between night-time deposition velocities of carbonyl sulphide and molecular hydrogen inferred from semi-continuous atmospheric observations
    Strong similarities between night-time deposition velocities of carbonyl sulphide and molecular hydrogen inferred from semi-continuous atmospheric observations
    ABSTRACT We investigated the diurnal variations of atmospheric carbonyl sulphide (COS) during 2011 at Gif-sur-Yvette, a suburban atmospheric measurement site in France. These data were collected semi-continuously...
    Size1.47 MB
    Downloaded171 times
    Last UpdatedJanuary 26, 2017
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    Accurate Monitoring of Sulfur Compounds in Silonite® Fused Silica Lined Canisters Utilizing a New Approach for Water Removal During Field Sampling
    Accurate Monitoring of Sulfur Compounds in Silonite® Fused Silica Lined Canisters Utilizing a New Approach for Water Removal During Field Sampling
    Glass and Silonite® ceramic treated stainless steel canisters oer higher recoveries of TO-15 Compounds than many other sampling devices, including electropolished canisters, Tedlar® bags and thermal...
    Size125.06 KB
    Downloaded291 times
    Last UpdatedJanuary 26, 2017
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    Expanding the Molecular Weight Range of Whole Air Sampling with Stainless Steel Canisters using Active SPME Sample Preparation and GCMS Analysis
    Expanding the Molecular Weight Range of Whole Air Sampling with Stainless Steel Canisters using Active SPME Sample Preparation and GCMS Analysis
    A new preconcentration technique utilizing “Active SPME” has eliminated the deciencies found with the canister technique, allowing recovery of heavy molecular weight compounds through C24 while being...
    Size1.32 MB
    Downloaded269 times
    Last UpdatedJanuary 26, 2017
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    A Cleaner, More Sensitive Approach to EPA Method 8260 Using Large Volume Static Headspace and Active SPME Preconcentration Prior to GCMS Analysis
    A Cleaner, More Sensitive Approach to EPA Method 8260 Using Large Volume Static Headspace and Active SPME Preconcentration Prior to GCMS Analysis
    An improved approach for performing EPA method 8260 is presented. Large Volume Static Headspace (LVSH) sample introduction is used which improves method sensitivity relative to standard Purge & Trap...
    Size1.45 MB
    Downloaded285 times
    Last UpdatedJanuary 26, 2017
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    A More Comprehensive And Sensitive Method For CO2 Quality Assurance
    A More Comprehensive And Sensitive Method For CO2 Quality Assurance
    Abstract A technique for the comprehensive analysis of contaminants in Carbon Dioxide has been developed which quantifies a wide range of compounds that previously required multiple methods. Samples are...
    Size326.95 KB
    Downloaded280 times
    Last UpdatedJanuary 26, 2017
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    Enhanced Preconcentrator for the Analysis of Vapor Phase Volatile Organic Compounds
    Enhanced Preconcentrator for the Analysis of Vapor Phase Volatile Organic Compounds
    Abstract Analysis of volatile organic compounds (VOCs) in ambient air or other vapor phase matrices, such as soil gas, product o gassing, or large volume headspace has been enhanced by improvements in...
    Size1.51 MB
    Downloaded270 times
    Last UpdatedJanuary 26, 2017
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    Creating Accurate Low Level TO15 Standards with the Entech 4700 Precision Diluter
    Creating Accurate Low Level TO15 Standards with the Entech 4700 Precision Diluter
    Background The analysis of Air Toxics TO-15 compounds in air by GCMS requires the accurate preparation of low level standards to fulfill 3 distinct requirements: 1 Create GCMS response factors for each...
    Size1.06 MB
    Downloaded202 times
    Last UpdatedJanuary 26, 2017
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    Headspace Analysis

    A Cleaner, More Sensitive Approach to EPA Method 8260 Using Large Volume Static Headspace and Active SPME Preconcentration Prior to GCMS Analysis
    A Cleaner, More Sensitive Approach to EPA Method 8260 Using Large Volume Static Headspace and Active SPME Preconcentration Prior to GCMS Analysis
    An improved approach for performing EPA method 8260 is presented. Large Volume Static Headspace (LVSH) sample introduction is used which improves method sensitivity relative to standard Purge & Trap...
    Size1.45 MB
    Downloaded285 times
    Last UpdatedJanuary 26, 2017
    Download