Aquatic Sampling of Pesticide
Researchers from the Helmholtz Centre for Environmental Research (Leipzig, Germany) used the Chemcatcher aquatic passive sampling device to collect samples from a 1-day pulse contamination with the pesticide thiacloprid.
Researchers from the Helmholtz Centre for Environmental Research (Leipzig, Germany) used the Chemcatcher aquatic passive sampling device to collect samples from a 1-day pulse contamination with the pesticide thiacloprid. The device consists of a sampler body and an Empore disk (3M, St. Paul, Minnesota) as the receiving phase. They examined a configuration without a diffusion-limiting membrane, which led to biofouling of the disk receiving phase. Use of a diffusion-limiting polyethersulfone membrane prevented the biofouling.
Study Explores Thin-Film Extraction of Biogenic Amines via HPLC-MS/MS
March 27th 2025Scientists from Tabriz University and the University of Tabriz explored cellulose acetate-UiO-66-COOH as an affordable coating sorbent for thin film extraction of biogenic amines from cheese and alcohol-free beverages using HPLC-MS/MS.
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.
