Headspace Sorptive Extraction of Sulfur Compounds in Water
Chemists from Wuhan University (Wuhan, China) used a headspace sorptive extraction technique based on a coated glass bar to determine volatile organic sulfur compounds in water.
Chemists from Wuhan University (Wuhan, China) used a headspace sorptive extraction technique based on a coated glass bar to determine volatile organic sulfur compounds in water. The glass bar was coated with a polyethylene glycol-polydimethylsiloxane-poly(vinyl alcohol) combination using a sol-gel approach. The sorptive bar was desorbed after extraction with ethanol. The researchers analyzed the extract using a large volume injection method with gas chromatography and flame photometric detection. They were able to complete more than 50 extractions without loss.
Multi-Step Preparative LC–MS Workflow for Peptide Purification
March 21st 2025This 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.
