ExactMP™ microplastic reference materials consist of precisely defined microplastic spikes embedded in a transparent, water-dissolvable pullulan film.
The transparent film allows the particles to be imaged and verified while immobilized within the matrix. The solidified matrix keeps the particles securely in place during handling and shipping. When exposed to water, the film rapidly dissolves, releasing only the microplastic spike particles for clean and controlled additions during method development, validation, and quality control.
 
Production
ExactMP™ samples are produced by dispersing microplastic beads in a pullulan solution prepared with ultrapure water. The suspension is then formed into small circular films (Ø = 4–7 mm) with a thickness of approximately 50-100 µm. During drying, the pullulan matrix solidifies and immobilizes the beads within the transparent film.
 
Particle size range
Standard size ranges: 10–30 µm, 40-60 µm, & 100-140 µm.
 
Particle concentration
Each indiviudal ExactMP™ sample holds a precise number of beads. Particle concentration increases with decreasing particle size.
• 10–30 µm: n = 300-500
• 40-600 µm: n = 150-300
• 100-140 µm: n = 100-150
 
Certificate of Analysis (COA)
All samples are accompanied by a sample-specific certificate of analysis (COA) for each individual sample. The COA includes:
• Polymer composition
• Particle size distribution within size groups
• Number of beads per individual sample.
• Processed and raw data, including micrographs from which the data was derived
 
COAs are accessible via a weblink or QR code printed on each sample label.
 
Download Certificate of Analysis (COA) examples:
• ExactMP™: Beads (40-60 µm), PE, Red
 
Source of origin
Our microplastic beads are sourced from commercial suppliers. As with many plastic microspheres available on the market, they may contain unknown additives. Whenever possible, we prioritize beads used in industrial processes to increase the relevance of your analyses.
 
Shipping
Depending on availability, orders are typically prepared within 1–3 weeks of order confirmation.
Once shipped, parcels are delivered worldwide via DHL Express, usually within 1–3 business days depending on the destination.
Shipping costs are automatically calculated at checkout on the basis of location.
 
Contact
Need a quote or have specific requirements?
Contact us to discuss tailored size ranges, concentrations, or additional customization options.