Learn how laboratories should investigate poor proficiency testing results, identify root causes, implement corrective actions, and improve quality management to prevent recurring issues.

Low SPE recovery does not have to mean method failure. Learn how fraction collection and analysis can identify analyte losses and guide effective troubleshooting steps.

Learn how surplus proficiency testing (PT) items can support method verification, analyst training, internal quality control, troubleshooting, and performance assessment in analytical laboratories.

Learn how to configure, customize, and navigate the new NIST 26 Chromatogram Window. This practical guide covers layouts, zooming, filtering, structure display, and efficient data review workflows.

Learn how ISO/IEC 17043 applies to proficiency testing schemes for sampling, including evaluation models, statistical design, homogeneity, assigned values, and sampling uncertainty.

Learn how to select the right HPLC detector by comparing sensitivity, selectivity, compatibility, and performance across common detection technologies.

Pre- and post-analytical PT/EQA schemes help evaluate the entire routine chemical analysis process, from sampling and preparation to interpretation and reporting of results.

How to extend SEC column lifetime: key degradation causes and best practices for contamination prevention, storage, and column protection.

How to define a PT strategy? Eurachem guidance explains how to set scope, frequency, and risk-based participation while integrating PT with broader QA tools.

Troubleshoot LC retention time shifts using T₀. Learn how to quickly distinguish between system-related and chromatographic issues.