Separation of oxypurines by ligand-exchange chromatography and determination of caffeine in beverages and pharmaceuticals

1971 ◽  
Vol 62 (1) ◽  
pp. 148-152 ◽  
Author(s):  
J.C. Wolford ◽  
John A. Dean ◽  
Gerald Goldstein
1981 ◽  
Vol 207 (2) ◽  
pp. 231-236 ◽  
Author(s):  
Yu.A. Zolotarev ◽  
N.F. Myasoedov ◽  
V.I. Penkina ◽  
I.N. Dostovalov ◽  
O.V. Petrenik ◽  
...  

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