The dye palladium meso tetra ( p sulfonatophenyl) porphyrin (Pd TSPP) has been bound to Dowex 1×2 200 resin by the electrostatic interaction. The resulting material could be extremely quenched by oxygen and is a useful probe for the measurement of oxygen in gas sample. The photochemical properties and the analytical performance of the room temperature phosphorescence (RTP) probe have been studied by using gas flow injection analysis (gFIA) system, which incorporates a convenient exponential dilution chamber for gas sample introduction. It was shown that the sensor has rapid response (Typical response times were 18s from N 2 to O 2 stream and 54s from O 2 to N 2 stream for 95% signals change), high precision (1 3% at 0 6% ( V/V ) O 2 level) and low detection limit (0 65% ( V/V ) O 2). The dye palladium meso tetra (p sulfonatophenyl) porphyrin (Pd TSPP) has been bound to Dowex 1 × 2 200 resin by the electrostatic interaction. The resulting material could be highly quenched by oxygen and is a useful probe for the measurement of oxygen in gas sample. The photochemical properties and the analytical performance of the room temperature phosphorescence (RTP) probe have been studied by using gas flow injection analysis (gFIA) system, which incorporates a convenient exponential dilution chamber for gas sample introduction. It was shown that the sensor has a rapid response (Typical response times were 18s from N 2 to O 2 stream and 54s from O 2 to N 2 stream for 95% signals change), high precision (13% at 0 6% (V / V) O 2 level ) and low detection limit (0 65% (V / V) O 2).