Prepare and maintain analytical standards, calibration solutions, reagents, and reference materials supporting GC, GC-MS, GC-FID, UPLC, UHPLC, LC-MS/MS, ICP-MS, and dissolution methodologies, including standards for nicotine, minor alkaloids, menthol, VOCs, aromatic amines, benzo[a]pyrene, TSNAs, carbonyls, flavor additives, organic acids, glycidol, and other target constituents.