@misc{10481/71677,
year = {2021},
month = {5},
url = {http://hdl.handle.net/10481/71677},
abstract = {Background: A hand-held portable direct-reading monitor, including photoionization detector (PID)
is renowned for its good sensitivity, considerable dynamic range, and nondestructive vapor detection
ability in comparison to the tardy response of the PID in gas chromatography (GC), which its application
has been restricted. In this study, the performance of a PID system (MultiRAE Lite) was evaluated as a
replacement of GC in the measurement of toluene in a dynamic adsorption system.
Methods: The test was done at different relative humidity levels (30%, 50%, and 80%), temperatures (21,
30, 40°C), and toluene concentrations (20, 100, 200, and 400 ppm).
Results: The PID achieved 48% of all measurements meeting the comparison criterion. The results
showed that the performance of the PID could be altered by the variables. The best performance of
the PID was at temperature of 21°C, the relative humidity of 50%, and concentration of 200 ppm with
the percentage of readings achieving the criterion of comparison to 58%, 54%, and 52%, respectively.
The averages of the PID readings (mean ± SD at 200 ppm= 207.9 ± 8.7) were higher than the reference
method measurements averages (mean ± SD at 200 ppm= 203.5 ± 5.8). The regression analysis of the
toluene results from the PID and the reference method results indicated that the measurements were
significantly correlated (r2 = 0.93).
Conclusion: According to the results, the device response is linear. Therefore, the findings are acceptable
in adsorption studies. In this way, the measurement of the sample concentration should be performed
using the same instrument before and after the reactor in order to calculate the adsorption efficiency.},
organization = {Tehran University of Medical Sciences},
organization = {Iran National Science Foundation (INSF)},
organization = {Tehran University of Medical Sciences	9421138001},
organization = {Iran National Science Foundation (INSF)},
publisher = {Kerman University of Medical Sciences},
keywords = {Toluene},
keywords = {Temperatures},
keywords = {Humidity},
keywords = {Adsorption},
keywords = {Chromatography},
keywords = {Gas regression analysis},
keywords = {Research Design},
title = {Evaluation of direct reading photoionization detector performance under various operational parameters},
doi = {10.34172/EHEM.2021.15},
author = {Khoshakhlagh, Amir Hossein and Carrasco Marín, Francisco},
}