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This study aims to develop a method for quantitative elemental analysis of technical polymers containing refractory oxides using microwave-assisted digestion with tetrafluoroboric acid.

July 30, 2026Open Access

Development of a multi-element quantification method for technical polymers containing refractory oxides after microwave-assisted digestion using HBF4

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This study aims to develop a method for quantitative elemental analysis of technical polymers containing refractory oxides using microwave-assisted digestion with tetrafluoroboric acid.
A two-step microwave-assisted digestion protocol using HNO3, H2O2, and HBF4 was developed.
The method was benchmarked against HF-based digestions and applied to various polymers including polyethylene and polyvinyl chloride.
The optimized conditions were 4 mL HNO3 + 1 mL H2O2 at 200 °C for 75 min, followed by 1 mL HBF4 at 180 °C for 45 min.
Recoveries for Al, Ca, Mg, Ti, and Zr were between 90-105% with relative standard deviations ≤5%.
Limits of detection were ≤2.6 mg kg-1, and limits of quantification were ≤8.5 mg kg-1 for most elements.
The method demonstrated accuracy and applicability for certified reference materials and various polymer masterbatches.

Authors

SKSaskia KerkelingFH Münster BEBo-Magnus ElfersUniversität Hamburg MKMartin KreyenschmidtFH Münster

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Implication

Randomized trial reveals an efficient method for elemental analysis of technical polymers and microplastics, suggesting a robust approach for quality control.

Cite This Study

Kerkeling et al. (2026) studied this question.

synapsesocial.com/papers/6a6af58c60e2b924d3ea1ff2 https://doi.org/10.25974/fhms-20502

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Implication

Randomized trial reveals an efficient method for elemental analysis of technical polymers and microplastics, suggesting a robust approach for quality control.

Development of a multi-element quantification method for technical polymers containing refractory oxides after microwave-assisted digestion using HBF4

Key Points

Discussion

Implication

Cite This Study

Development of a multi-element quantification method for technical polymers containing refractory oxides after microwave-assisted digestion using HBF4

Key Points

Discussion

Implication

Cite This Study

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