You can resize any of the graphs by clicking and dragging a rectangle. If you hover the mouse over the graph, you will see a pop-up showing the coordinates. One of the icons in the upper right corner will let you export the graph in other formats.
This optical absorption measurement of Vitamin B12 were made by R.-C. A. Fuh in the summer of 1995 using a Cary 3. The absorption values were collected using a spectral bandwidth of 1.0 nm, a signal averaging time of 0.133 sec, a data interval of 0.25 nm, and a scan rate of 112.5 nm/min.
These measurements were scaled to make the molar extinction coefficient match the value of 27,500cm-1/M at 361.0nm (Hill, 1964).
Dixon, J. M., M. Taniguchi and J. S. Lindsey (2005), "PhotochemCAD 2. A Refined Program with Accompanying Spectral Databases for Photochemical Calculations, Photochem. Photobiol., 81, 212-213.
Du, H., R.-C. A. Fuh, J. Li, L. A. Corkan and J. S. Lindsey (1998) PhotochemCAD: A computer-aided design and research tool in photochemistry. Photochem. Photobiol. 68, 141-142.
Fugate, R. D., C.-A. Chin and P.-S. Song (1976) A spectroscopic analysis of vitamin B12 derivatives. Biochim. Biophys. Acta 421, 1-11.
Hill, J. A., J. M. Pratt and R. J. P. Williams (1964) The chemistry of vitamin B12. Part I. The valency and spectrum of the coenzyme. J. Chem. Soc. (London) 5149-5153.
Pratt, J. M. and R. G. Thorp (1966) The chemistry of vitamin B12. Part V. The class (b) character of the cobaltic ion. J. Chem. Soc. A, 187-191.