Zebron Guard columns Z-Guard for extending column lifetime

Zebron Z-Guard guard columns are universal deactivated fused-silica capillary tubing designed to protect analytical GC columns from contamination and premature performance deterioration. Installed before the analytical column, a guard column helps trap non-volatile and semi-volatile sample components that may contaminate the stationary phase and compromise chromatographic separation.

Zebron Z-Guard guard columns from Phenomenex are compatible with virtually any capillary GC column, regardless of manufacturer. They help extend analytical column lifetime, improve peak shape—especially for early-eluting compounds—and enhance sensitivity and quantitative accuracy. Each guard column is individually quality-controlled for surface activity, bleed, and stability.

Zebron Z-Guard Series

Z-Guard — Universal Guard Columns for Analytical GC Column Protection

Zebron Z-Guard columns are installed upstream of the analytical column using a suitable connector, providing an additional section for trapping contaminants. This helps reduce the impact of matrix components on the analytical column's stationary phase and allows the contaminated section to be replaced or trimmed when necessary, without replacing the entire analytical column.

Guard columns are available in different internal diameters and lengths, allowing users to select a configuration that matches their analytical column and method conditions. Specialized high-temperature Z-Guard versions are also available for applications involving elevated temperatures.

Recommended applications: protection of capillary GC columns during the analysis of complex matrices, food products, biological samples, petrochemical products, pesticides, pharmaceutical compounds, and other samples containing non-volatile or semi-volatile contaminants.