Chemistry: analytical and immunological testing – Metal or metal containing – Organometallic compound determined
Reexamination Certificate
2008-04-29
2010-10-19
Hill, Jr., Robert J (Department: 1797)
Chemistry: analytical and immunological testing
Metal or metal containing
Organometallic compound determined
C436S155000, C436S177000
Reexamination Certificate
active
07816142
ABSTRACT:
A system for testing multiple samples for the presence of lead includes a plurality of vessels, a plurality of plungers, a housing for removably storing the plurality of vessels, and a retainer for holding the plurality of plungers so that each of the plungers may be inserted into a respective vessel simultaneously. In order to use the system of the present invention, a sample is placed within each of the plurality of vessels and a reagent, such as nitric acid, is added to each sample. Each sample is then heated in a separate heating device and a filtering means, such as a cotton ball, is inserted into each vessel. Each plunger then pushes its respective cotton ball into its respective vessel simultaneously so that each liquid sample is located adjacent the top of each vessel. The plungers are removed and the housing is then placed into an analyzer.
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EMSL Analytical, Inc.
Gerido Dwan A
Hill, Jr. Robert J
Lehrer Norman E.
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