Method for staged oxidation for enhanced nitrogen and sulfur...

Chemistry: analytical and immunological testing – Pyrolysis – combustion – or elevated temperature conversion

Reexamination Certificate

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C436S160000, C436S043000, C436S147000, C436S149000, C436S152000, C436S171000, C436S174000, C436S172000, C422S078000, C422S069000, C422S080000, C422S088000, C422S089000, C422S082050, C422S082070, C422S082080, C422S082090, C073S001010, C073S001020, C073S023200, C073S023310

Reexamination Certificate

active

07018845

ABSTRACT:
A more efficient method for combustion or oxidation of samples containing nitrogen, phosphorus and/or sulfur to their corresponding oxides is disclosed, where method uses multi-staged addition of an oxidizing agent to enhance oxidation and liberation of nitrogen, phosphorus and/or sulfur oxides for subsequent detection. The method of the present invention allows for the injection of larger samples or the introduction of a greater amount of sample per unit of time which results in a larger amount of analyte being delivered to the detector per unit of time, thereby improving detection limits and detection efficiency.

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