UHPLC users have access to a number of high performance choices, including a selection of Ultisil UHPLC (1.8 micron) phases with overlapping selectivity; Xtimate Hybrid UHPLC phases (C18 and C8); and Welch inline filters and guard columns designed for UHPLC applications. All Welch UHPLC columns feature:
Feature
- Column bed lengths: 30 mm to 150 mm
- Column inner diameters: 2.1, 3.0, 4.6 mm
- All phases available in all sizes
- Optimized low dead volume
- UHPLC frit design
- Optimized packing technique to enable use up to 15,000 psi
Xtimate UHPLC
Xtimate UHPLC C18 (USP L1) is a 1.8 micron hybrid stationary phase synthesized with octadecyl silane. Xtimate UHPLC C18 is 14% carbon loaded, giving it selectivity distinct from Ultisil UHPLC C18. In addition, Xtimate UHPLC C18 provides the widest useful pH range of the UHPLC phases: 1.0 – 12.5 pH.
Ultisil UHPLC Phases
Seven Ultisil Phases for UHPLC include six reversed phase options plus HILIC. Ultisil UHPLC stationary phases are based on 1.8 micron, B ultrapure silica. Higher peak heights and narrower peak widths contribute to improved sensitivity of 70% and 40% compared to 5 micron and 3.5 micron particles.
XB-C18
C18 (USP L1) with standard carbon loading.
AQ-C18
C18 (USP L1) with improved tolerance of aqueous mobile phases.
LP-C18
C18 (USP L1) with improved tolerance of low pH.
XB-C8
C8 (USP L7) is less retentive, as an option for C18.
XB-Phenyl
Alternate selectivity (USP L11) for phenyl groups.
Polar-RP
For very polar and strong basic analytes (USP L60, L1).
HILIC
For hydrophilic interaction liquid chromatography.