Manifold and method of batch measurement of Hg-196 concentration using a mass spectrometer

Patent · Tue Jan 01 00:00:00 EST 1991

OSTI ID:868077

Grossman, Mark W ^[1]; Evans, Roger ^[2]

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1. Belmont, MA
2. N. Hampton, NH

A sample manifold and method of its use has been developed so that milligram quantities of mercury can be analyzed mass spectroscopically to determine the .sup.196 Hg concentration to less than 0.02 atomic percent. Using natural mercury as a standard, accuracy of .+-.0.002 atomic percent can be obtained. The mass spectrometer preferably used is a commercially available GC/MS manufactured by Hewlett Packard. A novel sample manifold is contained within an oven allowing flow rate control of Hg into the MS. Another part of the manifold connects to an auxiliary pumping system which facilitates rapid clean up of residual Hg in the manifold. Sample cycle time is about 1 hour.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• DOE Contract Number: AC03-76SF00098
• Assignee: GTE Products Corporation (Danvers, MA)
• Patent Number(s): US 5068533
• OSTI ID: 868077
• Country of Publication: United States
• Language: English

Related Subjects

manifold
method
batch
measurement
hg-196
concentration
mass
spectrometer
sample
developed
milligram
quantities
mercury
analyzed
spectroscopically
determine
196
hg
02
atomic
percent
natural
standard
accuracy
002
obtained
preferably
commercially
available
gc
manufactured
hewlett
packard
novel
contained
oven
allowing
flow
rate
control
connects
auxiliary
pumping
facilitates
rapid
clean
residual
cycle
time
hour
atomic percent
mass spectrometer
flow rate
commercially available
rate control
mass spectroscopic
cycle time
manifold connects
/250/