Study on the Retention and Distributions of the Copper-Based Preservative in Standing Tree Chinese Fir (Cunninghamia lanceolata)

Figure 4

FTIR spectra of Chinese fir treated under different conditions. (a) Chinese fir; (b) 2 wt.% Cu-NH treated Chinese fir; (c) 4 wt.% Cu-NH treated Chinese fir; (d) 6 wt.% Cu-NH treated Chinese fir; (e) 2 wt.% Cu-NH-PEG treated Chinese fir; (f) 4 wt.% Cu-NH-PEG treated Chinese fir; (g) 6 wt.% Cu-NH-PEG treated Chinese fir.