TSKgel OApak-A

The TSKgel OApak-A column is packed with porous hydrophilic polymer beads which have been chemically modified with a weak cation exchange group. This column is optimized for the separation and analysis of organic acids by an ion exclusion mechanism. Applications include organic acids in fruit juices, wine, beer, coffee, and salt solutions.

This column is to be used in conjunction with the TSKgel OApak-P guard column which has a strong cation exchanger for the removal of dissociated strong acids under the isocratic mobile phase conditions of 0.75 mmol/L H₂SO₄.

P/N	Description	Particle Size (µm)	Housing Material	ID (mm)	Length (cm)	Price ($)
0016653	TSKgel OApak-A	5	Stainless Steel	7.8	30	2,209	Inquire

Product Attributes

Matrix:	hydrophilic polymer
Particle size (mean):	5 µm
Pore size (mean):	ND
Functional group:	proprietary
Counter ion:	H⁺
pH stability:	2.0 - 12.0
Small ion capacity:	>1.5 eq/L

Separation of Organic Acids

Columns:	A: TSKgel OApak-A, 5 µm, 7.8 mm ID × 30 cm B: TSKgel OApak-P guard, 6 mm ID × 4 cm
Mobile phase:	0.75 mmol/L sulfuric acid
Flow rate:	0.8 mL/min
Detection:	conductivity
Temperature:	60 °C
Injection vol.:	20 µL
Samples:	1. pyruvic acid (50 ppm) 2. tartaric acid (500 ppm) 3. citric acid (500 ppm) 4. malic acid (500 ppm) 5. pyroglutamic acid (500 ppm) 6. lactic acid (1,000 ppm) 7. acetic acid (2,000 ppm) 8. succinic acid (1,000 ppm)

For additional applications, please see our applications database.

Code #	Description	Literature Type
DS1104	TSKgel OApak Columns	Operating Conditions and Specifications
IM01	TSKgel Column Instruction Manual	Instruction Manual
LCAT02B	TSKgel U/HPLC Columns 2019 Product Guide -- CIEC Columns	Product Catalog

P/N	Description	Particle Size (µm)	Housing Material	ID (mm)	Length (cm)	Price ($)
0016654	TSKgel OApak-A Guard Column for 7.8 mm ID column	10	Stainless Steel	6	4	726

HPLC Columns

TSKgel OApak-A

Product Attributes

Separation of Organic Acids