Watercol Series

Convenient Measurement of Water

Watercol capillary GC columns contain innovative ionic liquid stationary phases that produce a sharp peak shape for water, allowing the convenient measurement of water by GC.

A sharp water peak shape allows:
  • Qualitative and Quantitative Measurement of Water
  • Linear Response
  • Great Sensitivity
  • Reproducibility

Narrow peak widths and optimal peak heights are also produced for many other small polar analytes. Therefore, these columns are suitable for applications where:
  • Water is an analyte: it can be integrated and quantified
  • Water is the injection solvent: because water does not tail, it does not interfere chromatographically with other analytes

The descriptive numbers (1460, 1900, and 1910) indicate the Kovats Retention Index (KRI) value of water at 100 °C isothermal oven temperature. KRI values indicate the elution location of the analyte relative to n-alkanes, in which the n-alkane carbon number is multiplied by 100. For example, a KRI of 1460 indicates that water elutes after tetradecane (nC14) and 60% of the interval before pentadecane (nC15) elutes.

Additional Watercol products are in the pipeline. If you do not see the chemistry and/or dimension you want, please send an inquiry to Supelco_Quotes@sial.com.