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ASI at Pitconn 2006
ASI made another splash at Pittcon this year!
Pittcon 2006: Foundations For Science
March 12-17, 2006
Orange Country Convention Center, Orlando, FL
Please contact us for more information on any of the presentations and papers listed below.
Oral Presentation |
| Session: |
#190 - Solid Phase Extraction and Solid Phase Microextraction at Work |
| Title: |
Investigation of Techniques That Give EPA Method 1664A Varying Results |
| Presenters: |
Joseph Stefkovitch, Al Kaziunas, Patricia
Fizgerald |
Abstract # 190-2:
The EPA method 1664A for Oil and Grease is very technique dependent.
Recoveries can be poor and an acceptable MDLs almost impossible to
achieve. Often filtration of the PAR samples through 47mm disks doesn’t
occur. The author presents the reasons for these problems and offers
data and solutions. Data comparisons are made between the new advances
in SPE disk design and older disks on both automated and manual
systems. Filtration speed and extending the "filterable" range of
samples previously not appropriate for SPE technology are also
addressed.
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Poster Presentation |
| Session: |
#960 - Drug Discovery Application of Pharmaceutical Techniques |
| Title: |
The "Green" Extraction of Phytosterols from Natural Products Using Supercritical Carbon Dioxide |
| Author: |
Al Kaziunas |
Abstract # 960-6:
Beta-Sitosterol, Campestrol and Stimasterol are found commonly in wheat
germ, soybeans and many other natural products. Concentrated extracts
of these phytosterols have been used successfully in the treatment of
benign prostate hyperplasia and the reduction of cholesterol absorption
throughout the body. This paper investigates the optimization of the
extraction parameters for phytosterol compounds from natural matrices
using supercritical carbon dioxide. Density, pressure and extraction
temperature of the “green” supercritical solvent are examined as
variables in this extraction study. Extracts are then analyzed for
total phytosterols including Campestrol, Beta-Sitosterol and
Stimasterol.
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Poster Presentation |
| Session: |
#1850 - Sampling and Sample Preparation |
| Title: |
Quick Processing for EPA Drinking Water and Waste Water Methods |
| Author: |
Al Kaziunas, Joseph Stefkovitch |
Abstract # 1850-31:
The slow filtration of 1 liter water samples through solid phase
extraction disks is a chronic problem experienced by environmental
laboratories. Many samples containing high levels of containments and
particulates are impossible to filter. In addition, analyte recoveries
can be poor and extraction precision unreliable. A new solid phase
extraction disk design is compared with existing extraction disks for
filtration speed and range of "filterable" samples. A range of "spiked"
water samples and real waste water discharge samples from petroleum,
metal and food processing facilities are evaluated. A ten (10) fold
decrease in filtration time and a marked increase in the "filterable"
range of samples using the novel disk design is detailed.
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Poster Presentation |
| Session: |
#1850 - Sampling and Sample Preparation |
| Title: |
Organizing the Laboratory to Efficiently and Accurately Process Soil Samples |
| Author: |
Al Kaziunas, Samuel Huber of Lancaster Labs |
Abstract # 1850-45:
The processing of soil samples for PCB analysis has been discussed and
described in numerous other papers. The dealing of single samples or
small runs of samples over an extended period of time is now
unremarkable. The situation changes dramatically when several thousand
samples in a 6 to 8 week period need to be processed and reported. This
paper will describe the organizational techniques employed and identify
the analytical approaches that are capable of meeting the objectives.
Representative data showing the processing of over 100 environmental
soil samples in an 8 hour period by pressurized solvent extraction as
well as analysis by GC/MS will be presented. Although not many
laboratories will not experience these kinds of through put needs, the
information presented can serve as a model for laboratories when those
inevitable times when the crush of a larger than normal sample through
put is necessary.
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