Figure 17. — (Upper) Chromatogram 

 of cottonwood (see figure 7 

 for peak identification) . 

 (Lower) Chromatogram of milled 

 wood lignin ( see text for 

 description) . 



o 



Cl 



0) 



16 24 32 



Time (min.) 



40 



8 / min. 



Isothermal 



50 



210 



Temperature ( C.) 



26 



