GPC Sample Clean-up System Model SCS-200

The determination of trace levels of priority pollutants (PCB, PAH, and pesticides) in complex enviromental and food samples requires analyte purification and concentration. It is necessary to remove high molecular weight interferences such as lipids, polymer and pigments from the sample before analyzing it by GC, GC/MS, or HPLC. This process is known as sample clean-up, and the most commonly used method is gel permeation chromatography (GPC).

SSI presents a unique solution for sample clean-up in the compact SCS-200 system. The system includes an isocratic pump, injector with preparative sample loop, GPC column, and fraction collector, which ensures that required pollutant fraction is collected according to a preset collection time. The process is fully automated and is controlled by a System Control Unit (SCU) keypad or by standard RS-232 communication via PC. Overpressure protection is ensured by a back-pressure regulator.

Specifications

Pump:
Flow rates	.01-9.99 mL/min
Max. pressure	2500 psi
Wetted material	316 stainless steel, ceramic, inert polymer
Injector	Manual injector with loop filler port and valve position sensing switching 2 mL sample loop (other volumes upon request)
Column
Dimension	250 x 16 mm (others upon request)
Sorbent	PS-DVB copolymer with 50 nm pores
Particle size	10 µm
Max. pressure	1500 psi
Max. temperature	60° C
Loading	300 mg of sample
Fraction collector	3-way electrically motorized valve