90 



80 



70 



z* 60 



o 



<" 50 



<f) 40 



z 



c 30 



I- 



20 



10 







( 



90 



Chlorophyll 



611 



silt width: Rock solt 

 Fluorite 



_l L. 



j u 



_j i_ 



10 II 12 13 14 15 



Phytol CzoHjoOH 



Copillary film 



10 II 12 13 14 15 



70 



2-60 1- 

 o 

 <n 50 



00 



^ 40 

 ^ 30 



Ethyl Chlorophyllide 



20 

 10 



Fluorite prism 



\ 2 3 4 t 6 7 8 9 iO li 12 13 14 15 



WAVE LENGTH, m,i 



Fig 21.4. Infrared spectra: top, chlorophyll (a + h) layer prepared by evaporation 

 of ethanol solution on rock salt cleavage plate ; center, liquid phytol in cell 0.3 mm. thick 

 with rock salt windows (curves B and C) and in capillary layer between two rock salt 

 cleavage plates (curve A); bottom, thin evaporated iilms of ethyl chlorophyllides (o + 

 h) on fluorite (curves A and B) and on rock salt (curves C and D) (after Stair and Co- 

 blentz 1933). 



