Soil Sampling and Drying Procedures Effective extraction of herbicide residues from agricultural soil begins with proper sample collection and preparation. Representative soil samples should be collected from multiple locations within the field using a soil corer or auger to obtain a composite sample. The sampling depth should correspond to the herbicide application zone, typically 0-15 […]

Target Antibiotic Classes: Understanding Polarity and pKa Ranges Developing an effective SPE method for trace antibiotic detection in wastewater begins with understanding the physicochemical properties of target compounds. The three major antibiotic classes—sulfonamides, fluoroquinolones, and macrolides—exhibit diverse polarity and ionization characteristics that directly influence SPE retention and elution strategies. Sulfonamides Sulfonamide antibiotics typically contain an