Supplementary Data for "Standardising ATR-FTIR Detection of Polymer-Compatible Spectral Residuals in Microplastic-Dosed Human Whole Blood: A Conservative Multi-Branch Framework with Cross-Matrix Validation"

Supplementary Data files SD1-SD15 supporting a conservative multi-branch ATR-FTIR framework for identifying polymer-compatible spectral residuals in experimentally microplastic-dosed human whole blood. Four human whole-blood sample codes and one distilled-water procedural matrix were analyzed, with five undosed and five dosed spectra per code (50 spectra total). Dosed fractions received mixed cryomilled plastic material at 5 ug/mL and were incubated at 4 C for seven days. Polymer-compatible evidence was evaluated across three analytical branches: standard blank-corrected matching, orthogonalized matching against background-associated components, and strict masked matching using conservative polymer-relevant spectral windows. The archive contains one folder per data item (SD1-SD15), each containing the underlying CSV outputs, extended image archives, and interactive HTML visualizations, along with a machine-readable inventory, a full manifest, and SHA-256 checksums for every packaged file. README.md and Supplementary_Data_Inventory.csv are also provided at the record level for inspection without downloading the archive. These data support only polymer-compatible spectral residual evidence. They do not constitute definitive detection of microplastics, particle counting, or mass quantification.