Radiant energy – Ionic separation or analysis – Methods
Reexamination Certificate
2008-08-05
2010-10-26
Wells, Nikita (Department: 2881)
Radiant energy
Ionic separation or analysis
Methods
C250S281000, C250S288000, C506S012000, C204S228700
Reexamination Certificate
active
07820964
ABSTRACT:
A composition adapted for mass spectral analysis is disclosed as are methods of its use in mass spectral analyses. A contemplated composition contains a mass spectrally-determinable amount of each of (i) at least one analyte to be assayed and (ii) a standard compound. Each of the molecules of the standard compound contains one or the other of a pair of two stable isotopes of the same element that differ in molecular weight by at least two atomic mass units. Those two isotopes are present in the molecules of the standard compound in a predetermined ratio that is other than the naturally occurring ratio of those isotopes.
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Husch Blackwell Welsh & Katz
Metabolic Analyses, Inc
Wells Nikita
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