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Historical Background on Analytical Techniques
DAVID T. TSUI, USAF, Capt
ARFL/HEST, Bldg 79
2856 G Street
Wright-Patterson AFB, OH 45433
(P) 937-255-5150 x 3183
(F) 937-255-1474
IPSC Analytical Methods Sub-Committee Co-Chairs
Steve Pia, USEPA-NERL
David Tsui, AFRL/HEST
Howard Okamoto, CA DHS
Sanwat Chaduri, UDOH/DELS
Contents
Analytical Techniques For Perchlorate Analysis
- Gravimetric Analysis - Ion Pair Extraction
- Nitron
- Methylene Blue
- Brilliant Green, etc.
- UV-Spectrometry
- Flame Atomic Absorption Spectrometry
- Ion Chromatography
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Disadvantages of Non-IC Methods
- Lack of Selectivity
- Lack of Specificity
- Lack of Sensitivity
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Perchlorate IC Methods
- Pre-Jan 1997
- Aerojet Method
- MDL = 100 ppb
- April 1997 to Jan 1998 - CDHS Method
- MDL = 4 ppb
- 45 Laboratories were contacted
- 23/45 Labs were using CDHS
- Jan - May 1998 - Dionex AS-11 Method
- Dionex TechNote 121
- MDL < 1 ppb
- Published in AEL., 4/1998
- 7/23 Labs have switched to AS-11
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CDHS Users
|
Air Force Research Lab -
Toxicology Laboratory |
Dionex Corp.* |
Metropolitan Water District
of Southern California * |
Thiokol * |
| UDOH - DELS * |
Montgomery Watson Labs * |
| Advanced Technology Labs |
Aerojet |
| APPL * |
Alliant Technology Systems |
| Alpha Analytical |
California DHS- Berkley |
| California DHS-Los Angeles |
California Laboratory Services |
Clinical Laboratory of San
Bernardino, Inc. |
Columbia Analytical Services |
| E. S. Babcock and Sons, Inc. |
Air Force Research Lab -
Environics Lab. |
Los Angeles Agricultural
Commission-Environmental
Toxicology Lab |
Weck Laboratories, Inc. |
| AMPAC |
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