Evaluation of direct reading photoionization detector performance under various operational parameters

The authors would like to thank Tehran University of Medical Sciences and Iran National Science Foundation (INSF) , for supporting this project. This study was supported by Tehran University of Medical Sciences under Ph.D. thesis scheme (Number: 9421138001) and the INSF. The funding body played no role in the design of the study, collection and analysis of data, interpreting results or writing the manuscript or decision to submit the manuscript for publication. The content of this publication is only the responsibility of the authors.