Quantification of Host Cell Protein Impurities Using the Agilent 6495C Triple Quadrupole LC/MS
Application Note Pharma & Biopharma Quantification of Host Cell Protein Impurities using the Agilent 6495C Triple Quadrupole LC/MS Author Abstract Linfeng Wu Agilent Technologies, Inc., This Application Note describes a method for sub-ppm host cell protein quantification in a mAb product. The workflow featured an Agilent AssayMAP Bravo platform, an Agilent 1290 Infinity II LC, and an Agilent 6495C triple quadrupole LC/MS. Introduction Experimental Sample preparation The mAb sample was subjected to Host cell protein (HCP) impurities are Instrumentation denaturation, reduction, alkylation, and low-level protein impurities derived • Agilent AssayMAP Bravo system trypsin digestion using the AssayMAP from the host organisms during the (G5571AA) Bravo system. SIL peptides were biopharmaceutical manufacturing combined at equal molar concentration • Agilent 1290 Infinity II LC including: process. Due to their potential to affect and spiked into the sample digest at product safety and efficacy, HCPs • Agilent 1290 Infinity II high-speed eight different levels (6.25, 12.5, 25, 62.5, must be monitored and controlled in pump (G7120A) 125, 250, 12,500, and 125,000 amol/µg drug products according to regulatory • Agilent 1290 Infinity II per SIL peptide) for quantitative analysis. requirements1. Traditionally, the multisampler (G7167B) with enzyme-linked immunosorbent assay LC/MS analysis sample cooler option (option 100) (ELISA) is the standard method for Samples were analyzed by the 6495C quantifying HCPs in protein therapeutics. • Agilent 1290 Infinity II triple quadrupole LC/MS in dMRM However, ELISA lacks the specificity thermostatted column mode using a nine-minute LC gradient. and coverage to identify and quantify compartment (G7116B) Tables 1 and 2 list detailed experimental individual HCPs.
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