Gas Buying 101 — Eliminating the Hassles Associated with Obtaining and Using Gases

A new type of micro-gas chromatography column was fabricated using direct metal laser sintering (DMLS) to circumvent manufacturing issues faced by other micro-GC systems.

Here's a taster of what to look forward to at the 54th International Symposium on High Performance Liquid Phase Separations and Related Techniques (HPLC 2025), which will be held from Sunday through Thursday, 15–19 June, 2025, in Bruges, Belgium.

Sample concentration is a parameter that can influence the quality of gel permeation chromatography/size-exclusion chromatography (GPC/SEC) separations and the obtained results. Understanding this influence can help to support the development of reliable GPC/SEC methods.

This article introduces a multi-step preparative purification workflow for synthetic peptides using liquid chromatography–mass spectrometry (LC–MS). The process involves optimizing separation conditions, scaling-up, fractionating, and confirming purity and recovery, using a single LC–MS system. High purity and recovery rates for synthetic peptides such as parathormone (PTH) are achieved. The method allows efficient purification and accurate confirmation of peptide synthesis and is suitable for handling complex preparative purification tasks.