Dear all,
Currently, I am investigating the result of Black Carbon and Elemental Carbon measurement. The EC is analyzed using DRI, and BC is analyzed using Aethalometer AE33. In literature, I found that usually the BC concentration quite similar to EC concentration. However, my data didn't show this pattern. BC concentration is much higher than EC concentration. Moreover, most samples show zero EC concentration (after corrected by pyrolysis organic carbon). For your information, I use reflectance EC instead of transmittance EC, because most pyrolysis carbon from transmittance shows the negative value (thus, I conclude that no pyrolysis carbon found by transmittance). What do you think about this? Where should I start the investigation? Thank you in advance.