Register to reply

Why does glucose have a lower rf value than fructose?

by DespicableMe
Tags: fructose, glucose
Share this thread:
DespicableMe
#1
Nov26-12, 11:21 PM
P: 41
Even though their molecular formulas are the same? Fructose is an isomer of glucose and they are both cyclic and have 5 carbons so I was wondering why fructose was higher on the TLC plate than glucose.
Thank you.
Phys.Org News Partner Chemistry news on Phys.org
Ice cream goes Southern, okra extracts may increase shelf-life
The fluorescent fingerprint of plastics
Researchers develop models to study polyelectrolytes, including DNA and RNA
Borek
#2
Nov27-12, 02:27 AM
Admin
Borek's Avatar
P: 23,536
It is not about molecular formulas, it is about interactions between the molecule and the stationary phase. These interactions are extremely sensitive to the molecule structure, which is why chromatography is so efficient as a separation method.


Register to reply

Related Discussions
The difference between glucose sensor & glucose based biofuel cell Medical Sciences 0
Life prefers to use glucose over other sugars Biology, Chemistry & Other Homework 1
Bacteria have a system called catabolite repression Biology, Chemistry & Other Homework 0
Determine amount of glucose-1-phosphate & glucose-1,6-diphosphate Biology, Chemistry & Other Homework 0
Making Glucose vs. Breaking Glucose Introductory Physics Homework 4