I need to determine the molecular weight of a polymeric sample in NMP through GPC. Can it be done through THF column or is there any specific column for NMP.
N-Methyl-2-pyrrolidone is a regulated substance. Attached is the OSHA method which uses a DB-Wax column in a GC-FID.
https://www.osha.gov/dts/sltc/methods/partial/pv2043/2043.html
Thanks Bruce for your suggestion but I am looking for column details for gel permeation chromatography (GPC).
You can use our PSS GRAM or PSS PolarSIl columns when using NMP as eluent in GPC/SEC.
If you need further information, let me know.
You can use SDVB columns (styrene divinylbenzene). You need to select a column with proper pore size for your polymers - i.e. the range of pores allowing to separate the molecules on the basis of SEC mechanism. If you have a wide range of molecular masses you can couple a few columns with different range or use a "mix" bed containing particles of different pore size.
Why you use NMP, does your polymer is soluble in THF?
Remember that most important whing is the calibration make sure to use proper standars.
regards,
G
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