Abstract
In this paper, the authors describe an oxygen scrubber for use in liquid chromatography based on the reduction of oxygen by methanol added to the mobile phase. A short column, packed with platinum-on-alumina catalyst, provides the active surface for this reaction and is inserted in the chromatographic system just before the sample injection valve. Oxygen in the mobile phase is substantially reduced by the addition of as little as 1% methanol. The effectiveness of the platinum oxygen scrubber is demonstrated both for high-sensitivity reductive electrochemical detection and for the elimination of oxygen quenching in fluorescence detection.
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