High performance liquid chromatography (HPLC) is a well-known, tried and trusted method for mixture separation, widely used for quality analysis and control, as well as laboratory sample preparation. Preparative HPLC systems (including semi preparative and narrow-bore) accomplish high flow rates of up to 100ml/min and at pressures of up to 50 bar/725psi, with high volumetric linearity. A preparative HPLC system typically employs a UV, RID and/or IR detector for highly accurate separation analysis. When looking to purchase a preparative HPLC system, one must pay note to models that provide interoperability with other lab equipment, real time computer analysis and control (or computer-independent control) and comprehensive database storage options.
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| Company | Polymer Char | Polymer Char |
| Item | PREP C20 Instrument | PREP_mc2 Instrument |
| Catalog Number | PREP C20 | PREP_mc2 |
| Price | | |
| Description | PREP C20 is a fully-automated preparative pilot-plant-type equipment designed to fractionate, in a column's support, large amounts of polymer according to its chemical composition by a Temperature Rising Elution Fractionation (TREF) process, or according to its Molar Mass, by modifying the solvent PREP C20 is a fully-automated preparative pilot-plant-type equipment designed to fractionate, in a column's support, large amounts of polymer according to its chemical composition by a Temperature Rising Elution Fractionation (TREF) process, or according to its Molar Mass, by modifying the solvent power through a solvent-non solvent combination, typically in isothermal conditions.
A dry sample is put in a vessel and filled with solvent for dissolution. The sample solution is then loaded into a column where the fractionation takes place. The equipment fractionates the sample following the selected method's conditions and number of fractions, which can be eluted at the volumes desired.
The main steps in the preparative fractionation process (dissolution, column loading, crystallization, elution, and fraction collection) are performed in an automatic mode, thus, avoiding the need for handling hot and large amounts of solvent.
PREP C20 facilitates cross-fractionation studies (fractionation through TREF or Molar Mass and follow up analysis through GPC/SEC or TREF), that have been demonstrated to be a necessary tool to fully characterize resins. The fractions obtained can be further analyzed by spectroscopic techniques and can be used for micromechanical testing as well.
- Fully-automated preparative fractionation
- Up to 20 grams of polymer, depending on the sample.
- Column-based fractionation.
- Unlimited number of fractions (up to 9 fractions without exchanging bottles).
- No handling of hot solvents.
- Fractionation modes by TREF technique or by Molar mass through solvent- non-solvent approach.
- Subambient operation thanks to an integrated compressor (no need for liquid coolants).
- By exchanging the column, the fractionation can be performed by Thermal or Solvent Gradient Interaction Chtomatography.
... Read More | PREP mc2 is a preparative instrument that obtains the physical fractions of a polymer according to its molar mass or chemical composition (TREF or CRYSTAF). The sample is put into the vessels and the fractionation is performed automatically according to the selected method conditions in less than 24PREP mc2 is a preparative instrument that obtains the physical fractions of a polymer according to its molar mass or chemical composition (TREF or CRYSTAF). The sample is put into the vessels and the fractionation is performed automatically according to the selected method conditions in less than 24 hours.
The resulting fractions can be analyzed afterwards by techniques such as GPC, TREF, CRYSTAF, NMR, FTIR or DSC. Up to 16 fractions can be obtained from a single sample fractionation, and two different samples can be fractionated at the same time, in which case up to 8 fractions per sample can be collected per run.
Features - Fully-automated fractionation process.
- Possibility of subambient operation (down to -20°C) for low crystallinity samples.
- Flexible hardware and software to carry out different fractionation methods.
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