An In-Field Assessment of the P.ALP Device in Four Different Real Working Conditions: A Performance Evaluation in Particulate Matter Monitoring

被引:2
作者
Fanti, Giacomo [1 ]
Borghi, Francesca [2 ]
Campagnolo, Davide [1 ]
Rovelli, Sabrina [1 ]
Carminati, Alessio [1 ]
Zellino, Carolina [1 ]
Cattaneo, Andrea [1 ]
Cauda, Emanuele [3 ,4 ]
Spinazze, Andrea [1 ]
Cavallo, Domenico Maria [1 ]
机构
[1] Univ Insubria, Dept Sci & High Technol, I-22100 Como, Italy
[2] Univ Bologna, Dept Med & Surg Sci, I-40126 Bologna, Italy
[3] NIOSH, Ctr Direct Reading & Sensor Technol, Pittsburgh, PA 15236 USA
[4] Ctr Dis Control & Prevent, Pittsburgh, PA 15236 USA
关键词
miniaturized monitors; microenvironment; air quality; air pollution; exposure assessment; low-cost monitor; OUTDOOR; INDOOR;
D O I
10.3390/toxics12040233
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This study aimed to assess the performance, in terms of precision and accuracy, of a prototype (called "P.ALP"-Ph.D. Air Quality Low-cost Project) developed for monitoring PM2.5 concentration levels. Four prototypes were co-located with reference instrumentation in four different microenvironments simulating real-world and working conditions, namely (i) office, (ii) home, (iii) outdoor, and (iv) occupational environments. The devices were evaluated for a total of 20 monitoring days (approximately 168 h) under a wide range of PM2.5 concentrations. The performances of the prototypes (based on the light-scattering working principle) were tested through different statistical methods. After the data acquisition and data cleaning processes, a linear regression analysis was performed to assess the precision (by comparing all possible pairs of devices) and the accuracy (by comparing the prototypes against the reference instrumentation) of the P.ALP. Moreover, the United States Environmental Protection Agency (US EPA) criteria were applied to assess the possible usage of this instrumentation, and to evaluate the eventual error trends of the P.ALP in the data storage process, Bland-Altman plots were also adopted. The outcomes of this study underlined that the P.ALP performed differently depending on the microenvironment in which it was tested and, consequently, on the PM2.5 concentrations. The device can monitor PM2.5 variations with acceptable results, but the performance cannot be considered satisfactory at extremely low and remarkably high PM2.5 concentrations. Thanks to modular components and open-source software, the tested device has the potential to be customized and adapted to better fit specific study design needs, but it must be implemented with ad hoc calibration factors depending on the application before being used in field.
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页数:16
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