High-temperature gel permeation

QUALITY CONTROL OF COLUMNS FOR HIGH-TEMPERATURE GEL-PERMEATION CHROMATOGRAPHY... 

In most cases, calibration curves were determined at ambient or elevated temperatures using the Waters 150C High Temperature Gel Permeation Chromatograph which includes a sensitive refractive index detector. Otherwise, a modular system consisting of a Waters Model M6000A Solvent Delivery System, a Waters Model U6K Injector and a Waters Model 401 Refractometer, were used at ambient temperature. The mobile phase at room temperature was... 

High Temperature Gel Permeation Chromatography (HT-GPC) HT-GPC measures the average MW and MWD of polymers requiring higher analysis temperatures. 

Monrabal B, Sancho-Tello J, Montesinos J, Tarin R, Ortin A, del Hierro P, Bas M (2012) High temperature gel permeation chromatograph (GPC/SEC) with integrated IR5 MCT detector for polyolefin analysis a breakthrough in sensitivity and automation. In The applications book, July 2012. LCGC Europe, Chester... 

The sample preparation has been carried out at ambient pressure and temperature. The properties of the PEP-polymers used for the cloud-point measurements are listed in Table 8.1, for which the molecular weights have been measured with high temperature gel permeation chromatography (GPC, dynamic viscosity). The estimated relative error in the amounts of the components in the mixtures is <2% for PEP8.7, <0.1% for PEP51 and ethylene, and <0.7% for CO2. 

High-temperature gel permeation chromatography (GPC) is the standard technique for measuring the molecular weight distribution of polyolefins. Since gel permeation chromatography is a very well-established technique it will not be discussed here. Several publications provide additional discussions on the GPC technique [7-9]. 

MWD analysis for the samples was carried out using a Waters GPC2000CV high temperature gel permeation chromatogr hy (GPC) imit, equipped with a mixed bed GPC column (Polymer Labs mixed B-LS) and 1, 2, 4-trichlorobenzene (TCB) as the mobile phase. The mobile phase was used at a nominal flow rate of 1.0 ml/min and a... 

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