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T&T GPC/SEC: _Copolymer Analysis in GPC/SEC 3: 2-dimensional Chromatography
A problem in GPC/SEC, that cannot be solved by using any detection technique, is that the method may suffer from limited chromatographic resolution. Combination of different separation techniques…
Language
Publication Number
20353
Publication Type
Tip&Trick
Source
The Column
Year
2010
Publication date
15.11.2010
Issue
10
Author
P. Kilz
T&T GPC/SEC: _Faster Results
Traditionally GPC/SEC is a slow technique. A typical, non-optimized GPC/SEC run with 3 analytical columns and a precolumn needs about 45 to 60 minutes to be completed. This limits the number of…
Language
Publication Number
20383
Publication Type
Tip&Trick
Source
The Column
Year
2012
Publication date
07.08.2012
Issue
8
Author
D. Held
T&T GPC/SEC: _GPC/SEC columns - Dos and Don'ts
GPC/SEC columns, like all LC columns, have a finite life time and in order to get the best performance and a long life time the columns have to be treated properly. However, there are many ways to…
Language
Publication Number
20375
Publication Type
Tip&Trick
Source
The Column
Year
2011
Publication date
07.09.2011
Issue
7
Author
T. Hofe
T&T GPC/SEC: _GPC/SEC-Viscometry - a Versatile Tool for Structure Determination and More
In comparison to other GPC/SEC detectors as light scattering detectors or UV detectors, viscometers need more care. It takes longer times to get a stable baseline after changing from one solvent to…
Language
Publication Number
20380
Publication Type
Tip&Trick
Source
The Column
Year
2012
Publication date
09.02.2012
Issue
2
Author
D. Held
T&T GPC/SEC: _GPC/SEC: Increase Resolution and Separation Range
GPC/SEC is used to separate, identify and characterize macromolecules with respect to their molar mass averages and molar mass distribution (MMD). The precision and the accuracy of the results…
Language
Publication Number
20373
Publication Type
Tip&Trick
Source
The Column
Year
2011
Publication date
09.02.2011
Issue
2
Author
D. Held
T&T GPC/SEC: _How to get a stable Baseline
A stable baseline is a prerequisite for precise, accurate, and reproducible GPC/SEC analysis, especially for samples with a broad molar mass distribution. Baseline problems can include drift, wander…
Language
Publication Number
20381
Publication Type
Tip&Trick
Source
The Column
Year
2012
Publication date
11.05.2012
Issue
4
Author
D. Held
T&T GPC/SEC: _Improving the reliability of GPC/SEC light scattering and viscometry results
On-line light scattering and viscometer detectors increase the information depth of GPC/SEC data and allow the measurement of absolute molar masses and structures. However, even a set-up with advanced…
Language
Publication Number
20377
Publication Type
Tip&Trick
Source
The Column
Year
2011
Publication date
07.12.2011
Issue
10
Author
D. Held, P. Kilz
T&T GPC/SEC: _Is this real? Unexpected peak shapes
GPC/SEC samples show often broad and/or multimodal peaks, that are not baseline separated and look strange to users of other chromatographic techniques. However, although many weird looking peaks are…
Language
Publication Number
20378
Publication Type
Tip&Trick
Source
The Column
Year
2011
Publication date
07.12.2011
Issue
12
Author
D. Held
T&T GPC/SEC: _Peak Identification in GPC/SEC
Analyzing a complex mixture of unknown macromolecules and low molar mass compounds is often challenging in GPC/SEC. A disadvantage of the most commonly used detector, the very universal but unspecific…
Language
Publication Number
20354
Publication Type
Tip&Trick
Source
The Column
Year
2010
Publication date
08.12.2010
Issue
12
Author
D. Held
T&T GPC/SEC: _Result Uncertainty - How reliable are Results?
GPC/SEC results and their validity are crucial in many applications, e.g. as part of a QC/QA test for a product release, the registration and accreditation of polymeric products or formulations with…
Language
Publication Number
20382
Publication Type
Tip&Trick
Source
The Column
Year
2012
Publication date
12.06.2012
Issue
6
Author
D. Held, P. Kilz