Shodex: Packed Columns for HPLC Analysis

Columns for Organic Acids: RSpak KC-811

Columns using ion exclusion, ion exchange (ion chromatography) and partition/adsorption mode are suitable for organic acid analysis. Shodex RSpak KC-811 can be used to analyze many types of organic acids because separation of organic acids is carried out by a multi-mode of ion exclusion, size exclusion and partition/adsorption. Columns for ion chromatography, IC SI-90 4E and SI-50 4E, columns for partition/adsorption, RSpak DE-413 and multi-mode columns with ion exclusion and reversed phase, RSpak NN-814, can also separate some organic acids and may be considered in the selection process based on the analytical needs. When using KC-811, KC-LG must be used as guard column for samples with many foreign substances other than organic acid, and KC-G for those with few foreign substances.

(Satndard Columns)

Product name	Counter ion	Plate number (TPN/column)	Particle size (micron)	Size(mm) ID x Length
RSpak KC-811 RSpak KC-G RSpak KC-LG	H+ H+ H+	> 17,000 Guard column Guard column	6 10 12	8.0 x 300 6.0 x 50 8.0 x 50

Max. usable pressure: 5 MPa
Max. usable flow rate: 1.5mL/min (at the column temperature of 45 to 85 deg-C)
Max. usable temperature: 85deg-C
Max. usable ethanol concentration: 20%
In-column: 0.1% phosphate aqueous solution
Eluent conditions:
An aqueous solution containing 0.1% phosphoric acid is normally used as the eluent.
Do not use hydrochloric acid aqueous solution as the eluent since it corrodes the column.

(Preparative Columns)(Remark)

Product name	Plate number (TPN/column)	Particle size (micron)	Size(mm) ID x Length	Standard column
RSpak KC-2011 RSpak KC-LG	> 8,000 Guard column	20 20	20.0 x 300 8.0 x 50	KC-811 Guard column