TABLE OF CONTENTS - BGB Analytik AG

LC and LC/MS
PLgel Columns
Broad Polystyrene with 1 and 3 PLgel Mixed columns
Column: PLgel Mixed-C
79911GP-MXC
7.5 x 300 mm, 5 µm
(3 in series)
Mobile Phase: Tetrahydrofuran (THF)
Flow Rate: 1 mL/min
Temperature: 25°C
Detector: RID
Sample: Polystyrene EasyCal standards
in vials for calibration
Norm.
15000
10000
5000
0
-5000
-10000
-15000
-20000
0 5
a b
a) 1PLgel mixed column
b) 3PLgel mixed columns in series
10 15 20 25 30
Time (min)
The chromatogram shows the analyses of a broad technical polystyrene: part a)
with one PLgel Mixed-C column and part b) with a set of three PLgel Mixed-C
columns. Due to the better separation of the column set and the reduced
influence of band broadening, the calculated molecular weight averages are in
the latter case closer to the values determined with reference methods,
e.g. light scattering (see table).
Ultra High
Polymer
Distributions
Polymer MW
Distributions
Resins,
Condensation
Polymers
Low MW
Resins
Oils,
Oligomers
Organics