Routinely achieve reproducible, accurate, and sensitive protein quantification with ProteinWorks, Waters new family of protein bioanalysis sample preparation kits. ProteinWorks eXpress Digest Kits simplify and accelerate protein digestion, streamlining, and standardizing the traditionally complex pre-analytic workflow for LC-MS protein quantification via the surrogate peptide approach. The ProteinWorks uElution SPE Kit is designed for post-digestion clean-up, increasing assay sensitivity, and improving system robustness by removing excess digest reagents, phospholipids, and other plasma and serum components.