This article describes an optimized analysis method for sizing agents used in paper production, using gel permeation chromatography combined with an evaporative light scattering detector for qualitative and quantitative analysis. This method allows for monitoring and controlling the level of sizing agents in paper sizing fluids.
This document details a method for the qualitative and quantitative analysis of alkylketene dimers (AKD) using gel permeation chromatography (GPC) coupled with an Agilent evaporative light scattering detector (ELSD). AKD is used as a sizing agent in paper production, and its purity is affected by fatty acid impurities.
The recommended instrumentation consists of two PLgel 3 um MIXED-E columns coupled with an Agilent ELSD. The method utilizes THF as the eluent with a flow rate of 1.0 mL/min. The high efficiency and broad resolving molecular weight range of the columns, combined with the high sensitivity of the ELSD, allow for the separation and detection of AKD oligomers and low-level components.
| Column Dimensions | 300 x 7.5 mm |
|---|---|
| Column Efficiency | >80,000 plates/meter |
| Resolving Molecular Weight Range | up to 30,000 daltons |
| Nebulizer Temperature | 40 °C |
| Evaporator Temperature | 90 °C |
| Carrier Gas Flow | 1.5 SLM |
| Eluent | THF |
| Flow Rate | 1.0 mL/min |
The Agilent ELSD evaporative light scattering detector is recommended because it provides a significantly improved signal to noise ratio.
The eluent used for the analysis is THF.
The flow rate for the analysis is 1.0 mL/min.