Extraction of Acrylamide from Fried Potato Chips (Crisps) Using ISOLUTE® SLE+ Prior to LC-MS/MS Analysis

Importance of the Topic

Accurate monitoring of acrylamide levels in fried foods is essential due to its carcinogenic potential. Reliable quantitation in potato chips supports regulatory compliance and consumer health risk assessment.

Objectives and Study Overview

This study aimed to develop a supported liquid extraction (SLE) method using ISOLUTE SLE+ columns to isolate acrylamide from potato chip matrices with high recovery and sensitivity down to 10 ppb. Both machine-fried and hand-fried, flavored and unflavored samples were evaluated to demonstrate method robustness.

Methodology and Used Instrumentation

Sample Preparation:

• Crush 1 g of potato chips and spike with internal standard (13C3-acrylamide).
• Extract with water, rotate, and centrifuge to separate aqueous phase.
• Apply 0.65 mL extract to ISOLUTE SLE+ 1 mL column; elute with ethyl acetate/THF (1:1).
• Dry under air or nitrogen at 40 °C and reconstitute in water (200 µL).

Instrumentation:

• ISOLUTE SLE+ 1 mL columns.
• VacMaster or PRESSURE+ manifold for SLE operations.
• SPE Dry or TurboVap 96 concentrator for solvent evaporation.
• Waters Acquity UPLC with Phenomenex Hydro C18 column (50×2 mm, 4 µm).
• Waters Quattro Premier MS in ESI+ mode with MRM detection.

Main Results and Discussion

• Recoveries for acrylamide and 13C3-acrylamide averaged 90% and 89% respectively, with RSDs below 7%.
• Calibration showed excellent linearity (r2 ≈ 0.9998) over 10–1280 ng/g range using reversed internal standard approach.
• Chromatograms demonstrated clear, interference-free detection at retention time ~1.16 min.
• Method performed consistently across flavored, salted, and hand-fried potato chips.

Benefits and Practical Application of the Method

The protocol offers a rapid, clean extraction with minimal matrix effects, enabling routine high-throughput QA/QC analysis of acrylamide in food products. The use of SLE streamlines sample preparation and reduces solvent consumption.

Future Trends and Opportunities

Advancements may include automation of SLE workflows, integration with high-resolution mass spectrometry for broader analyte screening, development of greener extraction solvents, and application of chemometric tools for process optimization.

Conclusion

The ISOLUTE SLE+ method provides a sensitive, robust platform for acrylamide analysis in complex food matrices, achieving high recoveries and precision. Its simplicity and efficiency make it suitable for routine food safety monitoring.

References

• Biotage Application Note AN797, 2013: Extraction of Acrylamide from Fried Potato Chips using ISOLUTE SLE+ prior to LC-MS/MS analysis.