GPC chromatograph Prominence-i

high-performance liquidprocessPDA

By adding the refractive index detector "RID-20A" to the integrated high-performance liquid chromatograph "Prominence-i", a conventional scale GPC system using multi detectors can be constructed with minimized footprint. A refractive index detector is generally used for GPC analysis of hydrophobic polymers. When trace-level additives that have UV absorption are contained in a polymer, both a UV detector and a photodiode array detector, which offers high-sensitivity detection, are used complementarily. By using the Prominence-i (PDA model), LabSolutions workstation, and LabSolutions GPC software (option), it is possible to simultaneously perform measurement of molecular weight distribution of a main component polymer using analysis results from the refractive index detector, and quantitative and qualitative analysis of trace-level additives using analysis results from the photodiode array detector. By incorporating a dual-temperature control function, which suppresses the effects of room temperature fluctuations, the RID-20A achieves excellent baseline stability and reproducibility. Moreover, the RID-20A significantly reduces stabilization time after being powered on. The stable baseline enables accurate analysis of molecular weight distribution. Shown below are a chromatogram and reproducibility of elution time results, over the course of five days, for an analysis of polystyrene containing additives. Prominence-i has a color liquid crystal display touch screen, enabling easy checking of operating conditions, such as the flow rate and oven temperature.