louboutin replica

Polymer Standards for Size Exclusion Chromatography 
in Organic solvents (for hydrophobic molecules)

Calibration in THF, Toluene, Xylene

The standard reference polymers that are soluble in organic solvents such as tetrahydrofurane, toluene, xylene, etc, are used for instrumencalibration or quality control during the performance of Size Exclusion Chromatography (SEC) tests of molecules insoluble in water.

The following standards are used for calibration of non polar (hydrophobic) polymers

Calibration in DMAc, DMF and DMSO

Polymers that  present polarity are most often analized in polar mobile phases such as n,n-DIMETHYLACETAMIDE (ACETIC ACID, DIMETHYLAMIDE) (DMAc) ; Dimethylformamide (DMF) and dimethyl sulfoxide (DMSO). 

The following standards are also available at PSS for calibration with polar solvents 

Nylon 6 Broad
Poly(ethyl methacrylate)
Poly(ethylene terephthalate)
Poly(n-butyl methacrylate)
Poly(vinyl chloride)
Poly(t-butyl acrylate)
Poly(t-butyl methacrylate)
Poly(vinyl acetate) 
Poly(vinyl chloride)
Poly(vinyl pyrrolidone) broad

 Shop for Organic Standards


Most common Narrow standards of Poly(methylmethacrylate) run with PSS Gram columns. 

Size Exclusion Chromatography (SEC) calibrations in these solvents usually perform better when the calibration molecule shows a siimilar degree of polarity

By far the most commonly used are Narrow standards of Polystyrene, run through hydrophobic columns such as the PSS SDV columns.

The majority of neutral (non polar) testing systems in organic solvents; copolymers, and resins. can be initially separated and charavterized by molecular weight using either a Refractive Index (RI) or an Ultra Violet (UV) detector. 

Latest News

  • GPC Training Course June 4th – 5th 2019 +

    GPC Training CourseJune 4th – 5th 2019 PSS USA will be hosting their GPC training course again. It provides lectures on Read More
  • Presentation at ACS Spring 2019 National Meeting & Expo +

    ACS Spring 2019 National Meeting in Orlando, FL, March 31 – April 4, 2019.  Determination of the Chemical Heterogeneity of Ternary Read More
  • New PSS e-book Series +

    Part 1: GPC/SEC Theory and Background Contact us to receive a free copy of PSS e-book Series part 1: GPC/SEC Read More
  • PSS Webcasts (on-demand) +

    PSS Webcasts (on-demand) Duration: 60 minutes, Q&A session included GPC/SEC/GFC Basics This webinar is designed for beginners and scientists who Read More
  • Introducing our new Online Store +

    We are pleased to announce that we will be launching our NEW and IMPROVED PSS online store on November 2nd . You Read More
  • 1