[Case Study] Advantages of Charged Particle Detectors in SEC Analysis

HPLC method achieving high-sensitivity quantitative analysis without complex preprocessing: Introducing quantitative know-how for quality control.

This application note introduces the analysis of polymer compounds using size exclusion chromatography (SEC) with the Vanquish Charged-Aerosol Detector (CAD). The CAD has approximately 100 times the sensitivity compared to a differential refractive index detector (RI) and is a versatile detector capable of accurately detecting semi-volatile and non-volatile components. Its wide dynamic range and excellent stability make it ideal for analyzing molecular weight distributions. This document discusses the detection of calibration standard samples and calibration curves, comparisons of sensitivity, and changes in retention time due to sample concentration, using polystyrene samples to compare RI and explain the characteristics and advantages of CAD. 【Features】 ■ High sensitivity detection: CAD achieves approximately 100 times the sensitivity compared to RI ■ Wide dynamic range: Accurately measures samples of diverse molecular weights ■ Detection in the polymer range: Effectively detects polymers with molecular weights up to 400,000 ■ Low concentration measurement: Minimal concerns about carryover or column loading even at low concentrations ■ Stability: Provides rapid stabilization and consistent results

Analytical Equipment and Devices