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Table 2.

Correlation coefficients among different metals in PM2.5 (Pearson’s R2). DOI: https://doi.org/10.1525/elementa.2020.00125.t2

VMnFeCoPbCuCdSbAsHg
         
Mn 0.505*         
Fe 0.692** 0.660**        
Co 0.769** 0.756** 0.807**       
Pb 0.767** 0.364 0.492* 0.701**      
Cu 0.736** 0.600** 0.803** 0.728** 0.539**     
Cd –0.076 0.113 –0.270 0.024 –0.039 –0.052    
Sb 0.508* 0.200 0.360 0.513* 0.352 0.153 –0.186   
As 0.610** 0.110 0.328 0.483* 0.704** 0.328 0.115 –0.277  
Hg 0.020 –0.059 –0.113 –0.049 0.004 –0.035 –0.059 –0.060 –0.099 
VMnFeCoPbCuCdSbAsHg
         
Mn 0.505*         
Fe 0.692** 0.660**        
Co 0.769** 0.756** 0.807**       
Pb 0.767** 0.364 0.492* 0.701**      
Cu 0.736** 0.600** 0.803** 0.728** 0.539**     
Cd –0.076 0.113 –0.270 0.024 –0.039 –0.052    
Sb 0.508* 0.200 0.360 0.513* 0.352 0.153 –0.186   
As 0.610** 0.110 0.328 0.483* 0.704** 0.328 0.115 –0.277  
Hg 0.020 –0.059 –0.113 –0.049 0.004 –0.035 –0.059 –0.060 –0.099 

* and ** denote that the correlation is significant when the confidence (2-tailed test) is 0.01and 0.05, respectively.

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