This protocol describes an automated quality-control workflow for X-ray fluorescence (XRF) core-scanning data acquired using an Avaatech XRF Core Scanner. The LAM+ Core QC application validates the original Avaatech Excel workbook, performs five complementary quality-control checks, assigns a row-level Quality Flag, and generates reports for subsequent data review. The workflow evaluates instrument stability, coherent and incoherent scatter signals, local depth-related anomalies, and replicate reproducibility. The resulting Quality Flags identify measurements requiring review while preserving the distinction between acquisition quality and geochemical interpretation. The workflow is implemented in Python and is designed for reproducible processing of Avaatech XRF core-scanning datasets.