(b) Two polymers of molar mass 21,000 are injected simultaneously in an SEC system. One has Mark-Houwink-Sakurada parameters of K = 2.1 × 10–5 dL.g–1 and α = 0.672, while the other has values of K = 11.4 × 10–5 dL.g–1 and α = 0.716.
(i) Will they elute at the same time? If not, which polymer will elute first?
(ii) If elution time is proportional to the logarithm of the hydrodynamic volume, approximately how much later (as a fraction of the time taken for the first polymer to appear) will the second polymer elute?
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(b) Two polymers of molar mass 21,000 are injected simultaneously in an SEC system. One has...
Q3. (a) Explain the principle of Size Exclusion Chromatography (SEC). (b) Two polymers of molar mass 21,000 are injected simultaneously in an SEC system. One has Mark-Houwink-Sakurada parameters of K = 2.1 × 10–5 dL.g–1 and α = 0.672, while the other has values of K = 11.4 × 10–5 dL.g–1 and α = 0.716. (i) Will they elute at the same time? If not, which polymer will elute first? (ii) If elution time is proportional to the logarithm of...