Characterization of Polyhexamethylene Guanidine Oligomers in Solutions and Aerosols Emitted during Humidifier Use

Figure 3

Relative intensities of PHMG types and oligomer components in a 100 ppm PHMG solution. A–E represent the PHMG structure, and 1–7 indicate the number of monomer units (also see Table S2 and Figure S4).