What are "narrow" and "broad" standards in gel permeation chromatography (GPC)? - WKB8716
Article number: 8716
ENVIRONMENT
- Gel permeation chromatography (GPC)
ANSWER
Narrow standards have narrow molecular-weight distribution and are typically chemically different than the sample. The polydispersity is less than 1.15.
Broad standards have broad molecular-weight distribution and are usually the same polymer as the sample being analyzed. The polydispersity is more than 1.5.
ADDITIONAL INFORMATION
Polydispersity is the ratio of weight average molecular weight (Mw) to the number average molecular weight (Mn).
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