Thermo Fisher, 053941, Dionex™ IonPac™ AS15 IC Columns

Dionex™ IonPac™ AS15 is a microbore anion-exchange column for trace-level determination of inorganic anions and low-molecular-weight organic acids in high-purity water. This 2 × 250 mm analytical configuration uses 9 µm packing, provides 56.25 µeq of capacity and operates at a recommended flow of 0.3–0.75 mL/min. The chemistry is optimized for early-eluting species such as fluoride, glycolate, acetate and formate, making it useful for semiconductor and power-generation water monitoring. The PEEK column supports pH 0–14 and can tolerate 0–100% HPLC solvents for cleanup. A large-loop injection format can improve sensitivity when trace analytes must be measured in very low ionic-strength samples. The 2 mm microbore format reduces eluent consumption compared with standard-bore columns while retaining the selectivity needed for trace analysis. For ultratrace work, sample cleanliness and contamination control during collection, injection and eluent preparation are critical because background anions can approach the analyte level.