Molecular Weight Standards, GPC/SEC Calibration Kits and Validation Standards

PSS supplies certified standards that meet the requirements of DIN 55672 and ISO/EN 13885. All reference materials are characterized with GPC/SEC to obtain molecular weight values. These values are subsequently confirmed by alternative methods such as Laser Light Scattering, Viscometry, MALDI-ToF, VPO and NMR.

Each product comes with a Certificate of Analysis, which provides the characterization information, the testing parameters, the molecular weight values (Mn, Mw, Mp, PDI) and the chromatogram. Calibration kits include a calibration report.

Products Sorted by Type - Click on the Material to open the Product List

  • Aqueous Mobile Phase
  • Organic Mobile Phase
  • Specialties / Particle Standards

Aqueous Mobile Phase

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Material safety data sheet: SDS

Hydroxyethyl starch

Material safety data sheet: SDS

Poly(acrylic acid) sodium salt

Material safety data sheet: SDS


Material safety data sheet: SDS

Poly(ethylene glycol)

Material safety data sheet: SDS

Poly(ethylene oxide)

Material safety data sheet: SDS

Poly(methacrylic acid) sodium salt

Material safety data sheet: SDS

Poly(styrene sulfonate) sodium salt

Material safety data sheet: SDS

Poly(vinyl alcohol) broad

Material safety data sheet: SDS

Poly(2-vinylpyridinium bromide)

Material safety data sheet: SDS


Material safety data sheet: SDS


Material safety data sheet: SDS

Poly(2-vinyl pyridine) aqu

Material safety data sheet: SDS

Poly(vinyl pyrrolidone) broad

Material safety data sheet: SDS

Poly(alpha-methylstyrene sulfonate) sodium salt

Material safety data sheet: SDS

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Poly(ethylene terephthalate)
Order No. Details Nominal MW Description PDI Packsize
PSS-pet3.5k picture_as_pdf 3500 Poly(ethylene terephthalate) <2,10 250,00
PSS-pet10k picture_as_pdf 10000 Poly(ethylene terephthalate) <2,10 250,00
PSS-pet18k picture_as_pdf 18000 Poly(ethylene terephthalate) <2,10 250,00
PSS-pet25k picture_as_pdf 25000 Poly(ethylene terephthalate) <2,10 250,00
PSS-pet35k picture_as_pdf 35000 Poly(ethylene terephthalate) <2,10 250,00
PSS-pet40k picture_as_pdf 40000 Poly(ethylene terephthalate) <2,10 250,00
PSS-pet50k picture_as_pdf 50000 Poly(ethylene terephthalate) <2,10 250,00
PSS-pet75k picture_as_pdf 75000 Poly(ethylene terephthalate) <2,10 250,00
PSS-pet120k picture_as_pdf 120000 Poly(ethylene terephthalate) <2,10 250,00
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Particle standards
Order No. Details Nominal MW Description PDI Packsize
4010A Microsphere Particle Standard (Size) 1.0µm, 15 ml
4011A Microsphere Particle Standard (Size) 1.1µm, 15 ml
4013A Microsphere Particle Standard (Size) 1.3µm, 15 ml
4016A Microsphere Particle Standard (Size) 1.6µm, 15 ml
4400A Microsphere Particle Standard (Size) 1000µm, 1 g
4310A Microsphere Particle Standard (Size) 100µm, 15ml
4210A Microsphere Particle Standard (Size) 10µm, 15ml
4311A Microsphere Particle Standard (Size) 115µm, 15ml
4212A Microsphere Particle Standard (Size) 12µm, 15ml
4314A Microsphere Particle Standard (Size) 140µm, 15ml
4215A Microsphere Particle Standard (Size) 15µm, 15ml
4316A Microsphere Particle Standard (Size) 160µm, 15ml
4202A Microsphere Particle Standard (Size) 2.0µm, 15ml
4025A Microsphere Particle Standard (Size) 2.5µm, 15 ml
4320A Microsphere Particle Standard (Size) 200µm, 1 g
4220A Microsphere Particle Standard (Size) 20µm, 15ml
4324A Microsphere Particle Standard (Size) 240µm, 1 g
4225A Microsphere Particle Standard (Size) 25µm, 15ml
4328A Microsphere Particle Standard (Size) 280µm, 1 g
4203A Microsphere Particle Standard (Size) 3.0µm, 15ml
4330A Microsphere Particle Standard (Size) 300µm, 1 g
4230A Microsphere Particle Standard (Size) 30µm, 15ml
4204A Microsphere Particle Standard (Size) 4.0µm, 15ml
4340A Microsphere Particle Standard (Size) 400µm, 1 g
4240A Microsphere Particle Standard (Size) 40µm, 15ml
4205A Microsphere Particle Standard (Size) 5.0µm, 15ml
4350A Microsphere Particle Standard (Size) 500µm, 1 g
4250A Microsphere Particle Standard (Size) 50µm, 15ml
4355A Microsphere Particle Standard (Size) 550µm, 1 g
4206A Microsphere Particle Standard (Size) 6.0µm, 15ml
4260A Microsphere Particle Standard (Size) 60µm, 15ml
4365A Microsphere Particle Standard (Size) 650µm, 1 g
4207A Microsphere Particle Standard (Size) 7.0µm, 15ml
4270A Microsphere Particle Standard (Size) 70µm, 15ml
4208A Microsphere Particle Standard (Size) 8.0µm, 15ml
4280A Microsphere Particle Standard (Size) 80µm, 15ml
4209A Microsphere Particle Standard (Size) 9.0µm, 15ml
3100A Nanosphere Particle Standard (Size) 100nm, 15 ml
3125A Nanosphere Particle Standard (Size) 125nm, 15 ml
3150A Nanosphere Particle Standard (Size) 150nm, 15 ml
3200A Nanosphere Particle Standard (Size) 200nm, 15 ml
3020A Nanosphere Particle Standard (Size) 20nm, 15 ml
3220A Nanosphere Particle Standard (Size) 220nm, 15 ml
3240A Nanosphere Particle Standard (Size) 240nm, 15 ml
3030A Nanosphere Particle Standard (Size) 30nm, 15 ml
3350A Nanosphere Particle Standard (Size) 350nm, 15 ml
3040A Nanosphere Particle Standard (Size) 40nm, 15 ml
3450A Nanosphere Particle Standard (Size) 450nm, 15 ml
3500A Nanosphere Particle Standard (Size) 500nm, 15 ml
3050A Nanosphere Particle Standard (Size) 50nm, 15 ml
3520A Nanosphere Particle Standard (Size) 520nm, 15 ml
3560A Nanosphere Particle Standard (Size) 560nm, 15 ml
3600A Nanosphere Particle Standard (Size) 600nm, 15 ml
3060A Nanosphere Particle Standard (Size) 60nm, 15 ml
3700A Nanosphere Particle Standard (Size) 700nm, 15 ml
3070A Nanosphere Particle Standard (Size) 70nm, 15 ml
3800A Nanosphere Particle Standard (Size) 800nm, 15 ml
3080A Nanosphere Particle Standard (Size) 80nm, 15 ml
3900A Nanosphere Particle Standard (Size) 900nm, 15 ml
3090A Nanosphere Particle Standard (Size) 90nm, 15 ml
2010A Duke Uniform Polymer Particles 9.7µm ± 0.4µm, 15ml
2009A Duke Uniform Polymer Particles 9.7µm ± 0.4µm, 15ml
6010 Ezy-Cal Particle Standard (Size) 10µm, 100 ml
6015 Ezy-Cal Particle Standard (Size) 15µm, 100 ml
6020 Ezy-Cal Particle Standard (Size) 20µm, 100 ml
6025 Ezy-Cal Particle Standard (Size) 25µm, 100 ml
6002 Ezy-Cal Particle Standard (Size) 2µm, 100 ml
6030 Ezy-Cal Particle Standard (Size) 30µm, 100 ml
6050 Ezy-Cal Particle Standard (Size) 50µm, 100 ml
6005 Ezy-Cal Particle Standard (Size) 5µm, 100 ml
6070 Ezy-Cal Particle Standard (Size) 70µm, 100 ml

Polydispersity Index, PDI

The Polydispersity Index, PDI, is a measure of the width of the molar mass distribution. It is defined as ratio of the weight average molar mass Mw and the number average molar mass Mn, PDI =Mw/Mn.

PDI is 1 for monodisperse substances (no molar mass distribution), it is larger than 1 for the vast majority of all macromolecules. The PDI depends on the polymerization technique applied to produce the material. In praxis the PDI can be very large up to values of 100 and above. Narrow PDIs can only be obtained using controlled/living polymerization techniques.

Please refer to the literature section to learn more.

  • Narrow Standards
  • Broad Standards

Narrow polymer standards are made by controlled/living polymerization techniques (living anionic/cationic, ATRP, RAFT, etc.) or by fractionation of very broad standards.

All narrow standards have small polydispersity indices and exhibit a sharp and slim chromatographic profile.

The Mp value (molar mass at the peak maximum) is well defined and independent on the column resolution. As Mp is the only clearly defined point in the chromatogram this value is used to establish GPC/SEC calibration curves.

Standards with a narrow molar mass distribution are used:

  • to construct a GPC/SEC calibration curve using the provided Mp values
  • for the validation of a chromatographic system
  • for the determining of physical constants

Broad reference materials are made by radical polymerization, polycondensation or coordinative polymerization (polyolefins).

The PDI of broad standards is usually > 1.5. For broad standards the Mp value is a function of the column resolution. Molar mass values provided for broad standards are thus only the average molar masses Mw and Mn.

Modern GPC/SEC software packages allow for the construction of a calibration curve by the use of Mw, Mn or the intrinsic viscosity [η] of broad standards.

Standards with a broad molar mass distribution are used:

  • to validate a chromatographic system
  • to determine physical constants such as the Mark-Houwink constants K and ∝
  • to construct a calibration curve using broad calibration options
  • to test for porosity mismatch
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