Simplifying ADC Analysis: Real-Time DAR And Concentration Measurement Without Dilution

Antibody‑drug conjugates demand tight control over complex variables, from drug‑to‑antibody ratio to batch‑to‑batch consistency, all while minimizing exposure to highly potent payloads. Traditional UV‑Vis methods often slow progress with dilution steps, off‑line testing, and added variability. Variable pathlength spectroscopy offers a different approach, enabling rapid, accurate measurement of concentration and DAR directly at‑line or in‑line across development and manufacturing. Real‑world examples highlight how slope‑based analysis simplifies workflows, reduces handling, and delivers actionable data in real time. Integrated in‑line measurements also strengthen process understanding during TFF, support tighter control strategies, and streamline scale‑up decisions.

Explore how applying Process Analytical Technology principles can reduce risk, accelerate decision‑making, and drive more reliable ADC outcomes from early development through manufacturing.