Fast Screening and Quantitation of Perfluorinated Sources from Textiles using Chemical Ionization GC-MS

Significance of Topic

The persistence and bioaccumulative potential of perfluorinated compounds in textiles pose significant environmental and health risks. Rapid screening and precise quantitation of PFOS/PFOA precursors are essential for regulatory compliance, quality control, and consumer safety assessment.

Objectives and Study Overview

This work aimed to establish a fast gas chromatography–chemical ionization mass spectrometry (GC/CIMS) method for simultaneous detection and quantitation of four perfluoroalkyl sulfonamides (FOSAs/FOSEs) and three perfluorinated acrylates (FTAcrs). These analytes are known to degrade into PFOS and PFOA and are included in the OECD’s priority list since 2007.

Methodology and Instrumentation

Sample Preparation and Calibration:

• Textile extraction: 1 g sample with THF at 60 °C for 1 h, 0.45 µm filtration, 10× concentration.
• Matrix-matched calibration: spiking with naphthalene-D8 internal standard and D-sorbitol as analyte protectant.

Chromatography and MS Conditions:

• GC: SH-Rtx-200 column (30 m×0.32 mm×0.5 µm), splitless injection (2 µL), helium carrier gas at constant linear velocity, oven ramp from 80 °C to 260 °C.
• MS: Positive chemical ionization with methane, ion source 200 °C, SIM acquisition monitoring quantitative and qualitative ions per compound.

Main Results and Discussion

• Complete separation of seven targets plus ISTD within a 7 min run (±0.10 min retention tolerance).
• Excellent linearity (R² ≥ 0.999) in matrix-matched calibration for all analytes.
• Matrix effects: acrylates showed slight ion suppression; FOSEs exhibited enhancement—addressed by matrix-matched calibration.
• Detection limits: IDLs of 2–3 ng/mL, LOQs of 5 ng/mL (S/N > 10 for quantifier ions).
• Repeatability (%RSD) at low levels: 5.9–9.6%. Accuracy across QC levels within ±20% of nominal.
• Application: N-EtFOSE detected at 2.45 ng/mL in polyester sportswear; FTAcr 8:2 and 10:2 found at 76.3 ng/mL and 36.8 ng/mL in umbrella fabric.

Benefits and Practical Applications

This GC/CIMS approach delivers rapid throughput, high sensitivity, and robust quantitation for monitoring residual perfluorinated coatings. It supports industrial quality control, environmental screening, and compliance testing in textile manufacturing.

Future Trends and Applications

• Expansion to cover a broader spectrum of PFAS precursors and degradation products.
• Integration with high-resolution MS for non-targeted screening.
• Automation of extraction and preparation workflows for high-throughput analysis.
• Coupling with biological assays to assess toxicological impact of detected compounds.

Conclusion

The optimized GC/CIMS method provides a fast, sensitive, and reliable protocol for quantifying key PFOS/PFOA precursors in textiles. Its validated performance in linearity, repeatability, and accuracy makes it suitable for routine screening and regulatory compliance.

References

• Renner R. Perfluorinated Sources Outside and Inside. Environ Sci Technol. 2004;38(5):80A.
• OECD. Lists of PFOS, PFAS, PFOA, PFCA, related Compounds and Chemicals that may Degrade to PFCA. ENV/JM/MONO(2006)15.
• Yeong HX, Olivia S, Lahey CM, Ting GWE, Loo LC. Fast and Accurate Quantitation of Perfluorinated Sources from Textiles using Gas Chromatography–Triple Quadrupole Mass Spectrometry. ASMS. 2017;TP296.