By using smaller resin particles and shorter column dimensions, this column provides the highest peak efficiency and Optimum separation of common inorganic anions allows rapid analysis of environmental waters.

• Ultra-fast isocratic separation of common inorganic anions can be completed in less than 3 minutes
• Compliance monitoring of common anions in drinking water as described in U.S. EPA Method 300.0 (A)
• High peak efficiency and increased resolution, resulting in more consistent integration and Get more reliable results
• Provides the same selectivity as Dionex IonPac AS18-Fast columns, so applications can be easily transferred to 4µm columns
• Compatible with Dionex IonPac AS18-Fast columns Compared with other columns, run times are shortened without compromising resolution
• Excellent separation of inorganic anions and low molecular weight organic acids in a variety of sample matrices
• Compatible with organic solvents , thereby improving analyte solubility, changing column selectivity, or facilitating efficient column cleaning

By using smaller resin particles, higher resolutions can be achieved and column backpressures in excess of 3000 psi can be generated. When operating a Dionex IonPac AS18-Fast-4µm capillary column at the standard flow rate of 10µL/min, an IC system capable of operating at pressures up to 3000 psi is sufficient. However, to take advantage of fast chromatography runs, when using high flow rates, a high-pressure capillary IC system is required, such as a Thermo Scientific™ Dionex™ ICS-5000⁺ HPIC or a Thermo Scientific™ Dionex™ ICS -4000 HPIC. The Dionex ICS-5000⁺ HPIC system is essential for proper operation of Dionex IonPac AS18-Fast-4µm microbore and standard bore columns.

Shorter 150mm AS18-Fast-4µm columns help run faster, while smaller particle sizes maintain higher Separation with high resolution; guard columns are available in 3 specifications:

• 4x150mm standard hole analytical column and 4x30mm guard column are used together
• 2x150mm analytical column and 2x30mm guard column Use
• 0.4x150mm capillary analytical column and 0.4x35mm guard column

Capillary columns can significantly reduce operating costs and waste disposal costs by saving eluent. Dionex IonPac AS18-Fast-4µm capillary columns use the same packing materials as their standard and microbore counterparts, providing the same performance. Operating costs are reduced because the eluent flow rate when operating a capillary system is only 1% of a standard orifice system. Capillary columns can be used with Thermo Scientific™ Dionex™ ICS-4000 and ICS-5000⁺ capillary systems.

• If you require higher resolution separations of more complex sample matrices, choose the longer 250mm Dionex™ IonPac™ AS18 Hydroxide Selective Anion Exchange Column
< li>The shorter 150mm Dionex IonPac AS18-Fast column runs faster than the longer 250mm column when analyzing relatively cleaner matrices, and the shorter column can operate at 3000 psi.