Surface‐enhanced Raman spectra of fulvic and humic acids on silver nitrate‐modified Fe‐C‐Cr‐Ni surface

Abstract
Highly resolved SERS spectra of fulvic and humic acids had been observed by spreading trace amount of the samples on silver nitrate‐modified Fe‐C‐Cr‐Ni surfaces. The results imply that the “building blocks”; of humic substances are low structurally graphite‐like carbons.