Preparing Standards for GC

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Preparing Standards for GC

A standard is a solution of exact and known concentration that we measure to calibrate the response of our instrument/method. Preparing standards for GC creates challenges which risk introducing accuracy errors into our standards due to issues with volatility, concentration, and the complexity of mixtures that are being analyzed. This quick guide details the optimum technique for successfully preparing GC standards.

Topics include:

Practical considerations
Preparing known and exact concentrations
Measure by volume or measure by weight?
Density and relative density
Preparing low concentrations
Choosing a suitable solvent
Practical technique
Preparing volume-in-volume standards
Preparing weight-in-volume standards
Preparing weight-in-weight standards
Stock solution
Worked example

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