Is My Drywall Chinese? - HB Litigation Conferences

Air Methods—Sorbents
• No all‐around good sorbent
• Some can be used with cryogenic assistance
• Gold surfaces have been used
• In‐site reactions—several types, but not specific
enough
• Sorbents rarely used, except in oceanographic and
climate research
• PPassive i samplers—not l t used d a lot, l t but b th have potential. t ti l
Need long periods of sampling for adequate sensitivity
(weeks). Currently in testing trial at several homes.
Analysis Methods—
Gas Chromatography
• Sulfur specific detectors
– Flame photometric photometric—old, old not as sensitive, sensitive non‐linear non linear
response
– Chemiluminescence—sensitive and specific, but
difficult to operate
– Pulsed Flame Photometric—new, sensitive, easy to
use, non‐linear response
– Atomic i emission i i ddetector—specific, ifi not widely id l used d
• Mass spectrometer—only certain systems can do
it well
6/23/2009
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