DENUDER TUBES USED WITH GAS-CHROMATOGRAPHIC INSTRUMENTATION TO MEASURE RATE COEFFICIENTS AND EQUILIBRIUM-CONSTANTS

To provide a scientific basis for conservation of objects of cultural heritage from air pollution, the use of denuder tubes in conjunction w ith gas chromatographic instrumentation is described. This leads to th e determination of deposition velocities, reaction probabilities, adso rption isotherms and other physico-chemical parameters for the action of air pollutants on solid surfaces. Cylindrical, annular, parallel pl ate and wet effluent denuders are theoretically described, in addition to simple cylindrical without air flowing through them. The latter ar e combined with the reversed-flow gas chromatographic technique.