Particle size standards990 nmNanoStandards™ Particle Size Standard 990 nmCat. No. 10990-20Pack size 20 mLPrice Particle size standards
MicroStandards™ Particle Size Standard 2 µm
- Cat. No.
- 11020-20
- Diameter
- 2 µm
- Pack size
- 20 mL
- Type
- Certified reference material
- Manufacturer
Technical data
| Nominal diameter | 2 µm |
|---|---|
| Form | suspension |
| Solids | 1% |
| Material | Monodisperse polymer (polystyrene) microspheres |
| Medium | Water with traces of an antimicrobial agent and a surfactant for colloidal stability |
| Diameters | NanoStandards 20-990 nm; MicroStandards 1-200 µm |
| Concentration (solids) | 1% up to 9 µm (w/v for NanoStandards); 2% from 10 to 90 µm; 3% from 100 to 200 µm |
| Pack | 20 mL dropper bottle |
| Traceability | NIST (unbroken chain of measurements to NIST SRMs) and SI (metre), through reference materials calibrated by an ISO/IEC 17025 accredited laboratory |
| Diameter calibration | Electron (TEM, SEM) and optical microscopy, confirmed by orthogonal methods: ESZ, SPOS, ADC, laser diffraction, DLS |
| Lot certificate | Certified mean diameter, standard deviation, expanded uncertainty |
| Shelf life | 36 months from the date of manufacture |
| Storage | Room temperature (4-30 °C) |
Description
Monodisperse polymer (polystyrene) microsphere suspensions to calibrate and verify instruments that measure particle size and number. The diameter is calibrated by electron and optical microscopy and confirmed with several independent methods (ESZ, SPOS, ADC, laser diffraction, DLS); traceability to NIST and to the SI metre runs through materials calibrated in an ISO/IEC 17025 accredited laboratory. Every lot has its own certificate with mean diameter, standard deviation and expanded uncertainty. NanoStandards from 20 to 990 nm and MicroStandards from 1 to 200 µm, in 20 mL dropper bottles stored at room temperature.
Applications
- Calibration and verification of DLS and laser diffraction particle sizers
- Verification of single particle optical sizing (SPOS) and electrical sensing zone (ESZ) counters
- Analytical differential centrifugation (ADC) and microscopy
- Instrument qualification and routine checks in pharmaceutical, semiconductor and biomedical quality control
- Inter-laboratory comparisons and procedures under ISO, GMP/GLP, ASTM and CEN
What you receive
Certificate
Lot certificate with certified diameter or concentration, traceable to NIST and SI.
Import and shipping
Import, customs and Italian invoice handled by VitaSan Labs, tracked shipping.
Technical support
We help you choose diameter, concentration and format for your instrument and method.
More products: particle size standards
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Are the standards traceable?
Yes: mean diameter, standard deviation and uncertainty are traceable to NIST and the International System of Units (SI) and stated on the certificate of every lot. The ISO/IEC 17025 series is certified by an accredited metrology laboratory.
Which control do I need for USP <788>?
For subvisible particle counting in injectables, use the PharmaCount controls: the USP <788> set for routine verification, the 3M and PC sets for single diameters. For USP <729> there is PharmaCount BiCal.
Can I order a diameter I do not see?
Yes: other diameters, concentrations and dyes are available on request. Tell us the value you need and we will send a quote.
How do I see the prices?
List prices per pack, excluding VAT, are shown after signing in to the customer area. With the quote request we confirm price, availability and delivery time.