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Home / Applications / The Analysis of Polymer Additives using Supercritical Fluid Chromatography

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  • Technique

The Analysis of Polymer Additives using Supercritical Fluid Chromatography

By Heather Haffner

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August 19, 2022

Introduction

SFC has been well established for chiral pharmaceutical separations and purifications and has also recently been utilized for achiral pharmaceutical compounds.

As SFC column technology continues to be explored, the SFC is being applied to various industries analyzing a wider range of compounds than ever before.

A typical polymer additive separation using HPLC can take upwards of 40 minutes. The speed of SFC should be able to significantly reduce that analysis time if it can successfully be applied to polymer additive separations.

Jasco SF-2000

Experimental

Results

Figure 1. Stack chromatograms of Tinuvin 327 (6ug/uL) , Irgafos 168 (4ug/uL), Irgafos 168 Phosphate (8ug/uL)and Chimassorb 81 (10ug/uL). Conditions: Column Luna C18 (150 x 4.6 mm, 5um) , Flow rate 3mLs/min (100% CO2), Temperature 40C, Back Pressure Gradient 150 bar to 250 bar over 4 minutes, 220nm, 50uL Injection each. At these concentrations the detector was clearly overloaded with signal.

The chromatogram of the 4 polymer additive standards separated using a pressure gradient is shown in figure 1. As seen the concentration of each was too high and thus the concentration of each was reduced when a mixture of the 4 was created. Figure 2 shows the separation of that mixture using a solvent gradient, while figure 3 shows the separation using the same pressure gradient used in figure 1.

Figure 2. Chromatogram of Tinuvin 327 (0.8ug/uL), Irgafos 168 (1.5ug/uL), Irgafos 168 Phosphate (3ug/uL) and Chimassorb 81 mixture (0.8ug/uL) in Acetone . Conditions: Column Luna C18 (150 x 4.6 mm, 5um) , Flow rate 3mLs/min (Grad 0% to 20% Methanol over 6 minutes), Temperature 40C, Back Pressure 150bar, 220nm, 15uL Injection.
Figure 3. Chromatogram of Tinuvin 327 (0.8ug/uL), Irgafos 168 (1.5ug/uL), Irgafos 168 Phosphate (3ug/uL) and Chimassorb 81 mixture (0.8ug/uL) in Acetone. Conditions: Column Luna C18 (150 x 4.6 mm, 5um) , Flow rate 3mLs/min (100% CO2), Temperature 40C, Back Pressure Gradient 150bar to 200bar over 4 minutes, 220nm, 10uL Injection.

Conclusion

SFC successfully separated Irgafos 168, Irgafos 168 phosphate, Tinuvin 327 and Chimassorb 81 using only CO2 as the mobile phase on a C18 column.

This document has been prepared based on information available at the time of publication and is subject to revision without notice. Although the contents are checked with the utmost care, we do not guarantee their accuracy or completeness. JASCO Corporation assumes no responsibility or liability for any loss or damage incurred as a result of the use of any information contained in this document. Copyright and other intellectual property rights in this document remain the property of JASCO Corporation. Please do not attempt to copy, modify, redistribute, or sell etc. in whole or in part without prior written permission.

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About the Author

JASCO Application Note

The Analysis of Polymer Additives using Supercritical Fluid Chromatography

Introduction

SFC has been well established for chiral pharmaceutical separations and purifications and has also recently been utilized for achiral pharmaceutical compounds.

As SFC column technology continues to be explored, the SFC is being applied to various industries analyzing a wider range of compounds than ever before.

A typical polymer additive separation using HPLC can take upwards of 40 minutes. The speed of SFC should be able to significantly reduce that analysis time if it can successfully be applied to polymer additive separations.

Jasco SF-2000

Experimental

Results

Figure 1. Stack chromatograms of Tinuvin 327 (6ug/uL) , Irgafos 168 (4ug/uL), Irgafos 168 Phosphate (8ug/uL)and Chimassorb 81 (10ug/uL). Conditions: Column Luna C18 (150 x 4.6 mm, 5um) , Flow rate 3mLs/min (100% CO2), Temperature 40C, Back Pressure Gradient 150 bar to 250 bar over 4 minutes, 220nm, 50uL Injection each. At these concentrations the detector was clearly overloaded with signal.

The chromatogram of the 4 polymer additive standards separated using a pressure gradient is shown in figure 1. As seen the concentration of each was too high and thus the concentration of each was reduced when a mixture of the 4 was created. Figure 2 shows the separation of that mixture using a solvent gradient, while figure 3 shows the separation using the same pressure gradient used in figure 1.

Figure 2. Chromatogram of Tinuvin 327 (0.8ug/uL), Irgafos 168 (1.5ug/uL), Irgafos 168 Phosphate (3ug/uL) and Chimassorb 81 mixture (0.8ug/uL) in Acetone . Conditions: Column Luna C18 (150 x 4.6 mm, 5um) , Flow rate 3mLs/min (Grad 0% to 20% Methanol over 6 minutes), Temperature 40C, Back Pressure 150bar, 220nm, 15uL Injection.
Figure 3. Chromatogram of Tinuvin 327 (0.8ug/uL), Irgafos 168 (1.5ug/uL), Irgafos 168 Phosphate (3ug/uL) and Chimassorb 81 mixture (0.8ug/uL) in Acetone. Conditions: Column Luna C18 (150 x 4.6 mm, 5um) , Flow rate 3mLs/min (100% CO2), Temperature 40C, Back Pressure Gradient 150bar to 200bar over 4 minutes, 220nm, 10uL Injection.

Conclusion

SFC successfully separated Irgafos 168, Irgafos 168 phosphate, Tinuvin 327 and Chimassorb 81 using only CO2 as the mobile phase on a C18 column.

This document has been prepared based on information available at the time of publication and is subject to revision without notice. Although the contents are checked with the utmost care, we do not guarantee their accuracy or completeness. JASCO Corporation assumes no responsibility or liability for any loss or damage incurred as a result of the use of any information contained in this document. Copyright and other intellectual property rights in this document remain the property of JASCO Corporation. Please do not attempt to copy, modify, redistribute, or sell etc. in whole or in part without prior written permission.
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