ANALYTICAL COLUMNS & GUARDS

Pickering Laboratories columns and guards are intended for specific applications that require post-column derivatization. This technology guarantees detection of certain classes of compounds at very low concentrations—amino acids, carbamate pesticides and polyamines, for example.

CATION – EXCHANGE COLUMNS AND GUARDS CATALOG INFORMATION

GARD™ COLUMN PROTECTION SYSTEM

The new GARD™ significantly prolongs column life without band spreading or added pressure

LITHIUM COLUMNS

Pickering Laboratories specialize in manufacturing of cation-exchange columns for amino acid analysis. 

SODIUM COLUMNS

Ion-exchange chromatography followed by post-column derivatization has been a method of choice for amino acid analysis for many years.  

GLYPHOSATE HERBICIDE ANALYSIS COLUMNS

Our cation-exchange Glyphosate column is designed and tested for analysis of Glyphosate.  

ALKION COLUMNS™

The stationary phase in the ALKION™ column is a rigid, non-porous polymeric phase that is surface sulfonated.  

CARBAMATE PESTICIDES COLUMNS

Our carbamate columns are guaranteed to produce the separation of carbamate residues.  

MYCOTOX™ COLUMNS

Aflatoxins are naturally occurring toxins belonginh to the class Mycotoxins. 

POLYETHER ANTIBIOTICS

Polyether antibiotics are best quantified using HPLC with post-column derivatization.  

QUALITY CRITERIA

Each column is packed and tested to separate the target compounds according to Pickering’s chromatographic quality control standards and published analytical method. The following acceptance criteria apply to all of Pickering’s columns:

  • With guard column installed, produce a specified chromatogram of the compounds in a standard test mixture.
  • Separate the compounds in the established order, with specified resolution of critical pairs.
  • Operate within the specified range of back pressure.
  • Be free of contaminating material which can cause baseline artifacts.

Only after all criteria have been met can the column’s serial number and label be applied.

Quite simply, the column is guaranteed to produce a chromatogram for its intended application if it is operated according to the conditions and methods prescribed by Pickering Laboratories.

ABOUT GUARD COLUMNS

While it is true that any of our columns may be run without a guard, the practical consequence is a shorter column lifetime. Pickering sells a variety of appropriate guard columns to protect our analytical columns. Additionally, GARD™ provides protection against contamination for cation-exchange applications without affecting column efficiency and it is far less expensive to replace than an analytical column.