Method of determining measurement bias in an emissions...

Details Method of determining measurement bias in an emissions... Method of determining measurement bias in an emissions...

2007-11-20

2007-11-20

Sines, Brian (Department: 1743)

Chemistry: analytical and immunological testing

Including sample preparation

Digestion or removing interfering materials

C073S001010, C073S001020, C073S023310, C422S062000, C422S083000, C422S084000, C422S085000, C422S086000, C422S087000, C422S088000, C422S089000, C422S091000, C422S092000, C422S093000, C422S094000, C422S095000, C422S096000, C422S097000, C422S098000, C436S155000, C436S158000, C436S159000, C436S116000, C436S117000, C436S118000, C436S122000, C436S133000, C436S134000, C436S136000, C436S174000, C436S178000, C436S181000

Reexamination Certificate

active

10092678

ABSTRACT:
A method of determining bias in a measurement of a constituent concentration level in a sample gas is provided. The method comprises establishing a sample gas flow from an emission stream into a sample gas line of an emissions monitoring system. The method further comprises removing water from the sample gas flow and cooling the sample gas flow to a temperature below about 41° F. to produce a cooled, dried sample gas flow. The constituent concentration level is then determined for the cooled, dried sample gas flow. The method further comprises introducing a span gas having a known span gas constituent concentration level into the sample gas flow to form a combined sample and span gas flow, the span gas being introduced at a desired span gas flow rate. The method still further comprises removing water from the combined sample and span gas and cooling the combined sample and span gas to a temperature below about 41° F. to produce a cooled, dried, combined sample and span gas flow. A combined sample and span gas constituent concentration level is then determined for the cooled, dried, combined sample and span gas flow. The method also comprises determining a measurement bias using the known span gas constituent concentration level, the sample gas constituent concentration level and the combined sample and span gas constituent concentration level.

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