TraceSELECT™ and TraceSELECT Ultra High Purity Reagents for Sample Preparation and Analysis. The Honeywell TraceSELECT™ product range includes high purity acids, bases, solvents and salts that are designed for trace and ultra-trace analysis. Sample preparation for inorganic trace analysis applications requires reagents of the highest purity. Specifically, they must have very low metal content to ensure appropriately low blanks. Our reagents are handled under clean-room conditions and supplied in high quality leach resistant bottles to ensure long-term purity. The certificates of analysis list up to 80 individual metal and anion traces.