6.4-7
Section 6
ApplicAtions
Pinnacle Operators Manual
Pickering Laboratories Inc.
Contamination usually occurs on the guard column. Wash it separately from the analytical column. This will
save much time in the washing and re-equilibration.
Contaminants of special concern: iron and other polyvalent cations, organic dyes, surfactants, detergents, and
lipids. They may cause irreversible damage.
Organic solvents will cause the resin in the column to swell. This leads to high back-pressure and broadened
peaks. The column sometimes can be regenerated.
Use Pickering eluants with the Pickering column, as they are designed to work together.
The test mixture for glyphosate is for qualitative use only. It is not recommended for calibration purposes.
Filter all samples through a 0.45µm membrane filter. Some samples may require even more stringent filtration,
especially if colloids are present.
Aqueous samples must always be properly buffered. Consult EPA Method 547 for details.
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