Two Instruments: Aromascan A32S Conducting-Polymer Array Steady-State Measurements on Gold4 and Gold5 — Annotated Table with Transient Correspondence

Dataset overview This dataset contains annotated steady-state sensor responses acquired with an Aromascan A32S conducting-polymer sensor array using two instrument units, Gold4 and Gold5, during a long-term measurement campaign conducted between 23 March 1999 and 20 January 2000. It complements the previously released Zenodo dataset “Gold4: Long-term stability dataset from an Aromascan A32S conducting polymer gas sensor array (v2)”, which contains the corresponding full sensor-response transients. The workbook contains 3942 exposures and 20 retained sensor channels. Each row represents one exposure and reports the time-averaged sensor response over the late-exposure window identified in the original data export as 150–180 s. Measurements include repeated exposures to n-butanol, ammonium chloride and propionic acid at several concentrations, together with buffer, hydrochloric acid and water blank or wash measurements. Most measurements were acquired on the Gold4 unit. Sessions 71–78, corresponding to the complete sixth batch and 368 exposures, were acquired on Gold5, while the remaining 3574 exposures were acquired on Gold4. The instrument used for each exposure is explicitly identified in the workbook, and a dedicated sheet summarizes the corresponding instrument periods. The main Cleaned_Intensity sheet combines the steady-state response data with annotations describing acquisition date, session, batch, protocol phase, instrument, class, analyte, replicate and correspondence with the transient-response files. Additional sheets summarize the session structure, instrument periods, wave-file correspondence, class counts, retained sensor channels and data-cleaning information. A row-by-row correspondence was established between the steady-state table and the transient dataset. A reliable match was obtained for 3482 of the 3942 steady-state measurements, corresponding to 75 sessions. All matched measurements were acquired on Gold4. The dataset can be used for studies of long-term sensor behaviour, repeatability, drift, inter-instrument variability, calibration transfer and chemometric modelling of conducting-polymer sensor arrays. Related dataset Gold4: Long-term stability dataset from an Aromascan A32S conducting polymer gas sensor array (v2)DOI: 10.5281/zenodo.22943152 Data source acknowledgement Aromascan plc A32S Conducting Polymer Dataset, courtesy Professor Krishna Persaud, University of Manchester.