Molecular Weight Standards, GPC/SEC Calibration Kits and Validation Standards
PSS uses GPC/SEC to obtain molecular weight values, which are subsequently confirmed by alternative methods; e.g., Laser Light Scattering, Viscometry, MALDI-ToF, VPO and NMR. Each product comes with a quality certificate, which provides the characterization information. The signed quality certificates include the testing parameters, the molecular weight values (Mn, Mw, Mp, PDI) and usually the chromatogram with the parameters (conditions) at which the data was obtained.
GPC/SEC Standards
Polymer standards in the stock are analyzed via GPC/SEC, yielding Mn, Mw, Mp and the polydispersity (PDI = Mw/Mn).
Every standard comes with a detailed certificate.
Part numbers:
use the overview (standards sorted by type and nominal Mw) or the Search in the products database (if nominal Mw is known).
Example for search: 'ps' or 'Polystyrene' and '100000' finds Poly(styrene) standards with nominal Mw 100000.
Certified Standards
PSS supplies certified standards that meet the requirements of DIN 55672 and ISO/EN 13885. Also the PSS quality certificates fulfill all DIN and ASTM requirements. PSS documents the molecular weights using GPC/SEC and additonal methods such as Light Scattering, MALDI-Tof, NMR, Viscometry or VPO.
Every certified standard comes with a detailed certificate.
European Reference Materials (ERM)/ Certified Reference Materials (CRM)
European Reference Materials (ERM)/ Certified Reference Materials (CRM) are highly characterized polymers and are certified by the German Federal Institute for Material Research and Testing (BAM). Their reported molar mass result from round robin tests at certified laboratories.
The ERM's/ CRM’s quality certificates are full reports with the results of the different characterization methods:
- GPC
- Light Scattering
- Viscometry.
Further, the certificate includes additional non-certified data
- MALDI-ToF
- NMR
- DSC
- and in some instances Rheology data
to provide the most sophisticated set of documentation for a particular polymer available worldwide.
Part numbers:
use the search results from the products database or the overview (standards sorted by type and nominal Mw).
Example for search: 'erm-fa' finds ERM standards/ 'crm' finds CRM standards .
GPC/SEC Calibration Kits
A calibration kit consists of 8 to 12 well-characterized standards of one polymer type. The kits include a calibration report using the individual standards, as well as the analytical conditions to create the calibration curve. A quality certificate accompanies each standard with all pertinent analytical parameters and molar mass distribution obtained by GPC/SEC.
ReadyCal Kits
PSS ReadyCal Standards are polymer cocktails preweighted into auto-sampler vials. Each vial has three or four polymers of the same type with different molar masses. Carefully selected molar masses are placed into each vial so that the polymer traces are baseline separated.
A ReadyCal Kit allows you to prepare fast and reproducible a 8 - 12 point calibration curve without the mess of weighin the samples. Just add solvent directly into the autosampler vial, let it stand for two hours, shake gently and load into your auto sampler for analysis.
Each kit contains 30 autosampler vials (for at least 10 calibration curves) that are color coded for your convenience. ReadyCals are available in 1.5ml and 4.0ml vials with Poly(styrene), Poly(methyl methacrylate) or Poly(ethylene glycol) molar mass reference standards (column not included).
The detailed certificate shows the calibration curve and details for the individual standards with chromatograms.
ReadyCal User documentation
Part numbers:
use the search results from the products database or the overview (standards sorted by type).
Example for search: 'ReadyCal' and 'ps' finds all Poly(styrene) ReadyCal kits.
MALDI-ToF Validation Kits
PSS MALDI standards are suitable for the validation and comparison of MALDI-ToF instruments. PSS provides MALDI spectra including Mw, Mn and Mp values of selected narrow polymers, which differ in molar mass and polymer type (polarity). The validation standards are characterized with GPC/SEC (Mw, Mn and Mp) and an absolute method such as NMR, Light Scattering, Viscometry, VPO (depending on polymer type and molar mass).
The 2 page quality certificate includes the GPC/SEC parameters as well as conditions and values of MALDI-ToF measurements.
Part numbers:
use the Search results from the products database or the overview (standards sorted by type and nominal Mw).
Example for search: 'MALDI-Kit' finds MALDI-ToF validation kit.
Light Scattering/Viscometry Validation Kits
PSS Light Scattering/Viscometry Standards are suitable for the easy, fast, and exact validation and data comparison of light Scattering, viscometry, and Triple instruments. PSS provides GPC/SEC, light scattering and viscometry data for various narrow and broad distributed polymers.
The quality certificate includes the molar mass averages of different methods, the GPC/SEC parameters and conditions of Light Scattering (LS) and/or Viscometry (Visco) measurements.
Part numbers:
use the search results from the products database or the overview (standards sorted by type and nominal Mw).
Example for search: 'Visco/LS-Kit' finds all validation kits for viscometry, light scattering, and Triple detectors.