Microtrac Testing Capabilities at Medallion Labs

At Medallion Labs, we offer a comprehensive suite of physical tests, including advanced Microtrac particle size analysis. Microtrac is one of our key methods for determining particle size distribution, complementing our other techniques like Alpine Granulation and Rotap testing.

Why is Particle Size Analysis Important?

Particle size is a critical factor influencing various aspects of food production, from manufacturing efficiency to the final product's sensory appeal and performance. Understanding particle size distribution can impact:

• Dissolution Rate: The speed at which a substance dissolves.
• Reactivity: How readily ingredients interact with each other.
• Solubility: The extent to which a substance dissolves in a solvent.
• Flowability: The ease with which powders and granules flow.
• Texture and Mouthfeel: The sensory experience of the product.
• Processing Efficiency: The effectiveness of mixing, blending, and other processes.

Microtrac Testing: Particle Size Analysis via Laser Diffraction

We utilize Microtrac technology for precise particle size determination in food samples using laser diffraction. This method can be requested independently or in conjunction with other tests. Our experts work with you on a case-by-case basis to determine the optimal testing solution for your specific needs.

Applications of Particle Size Analysis:

Particle size analysis is widely used for a variety of food products, including:

• Ground and Granular Materials: Flour, spices, sugar, etc.
• Homogenized Materials: Emulsions, sauces, dairy products, etc.
• Pastes and Semi-Solids: Nut butters, spreads, fillings, etc.
• Suspensions: Beverages, liquid concentrates, etc.

What Microtrac Testing Reveals (and What It Doesn't)

Microtrac testing accurately identifies the size and distribution of particles known to be present in a sample. It provides a detailed profile of particle sizes within the sample.

• Important Note:Microtrac testing does not determine if specific particles are present or quantify the total number of particles. Other analytical methods are required for those determinations.

How Microtrac Particle Testing Works: A Step-by-Step Overview

1. Sample Preparation: Food samples are carefully prepared to ensure accurate and reliable results. This often involves dispersion in a carrier fluid.
2. Carrier Fluid Selection: Samples are passed through the Microtrac analyzer in a suitable carrier fluid (typically water, isopropyl alcohol, or, in some cases, compressed air).
3. Wettability and Stability: The sample must be stable when saturated and the particles must be fully wetted (separated into individual particles) in the fluid.
4. Particle Liberation: Our experienced technicians ensure that the sample's particles are fully liberated from the matrix. For example, in almond butter, nut particles must be separated from the oil to prevent clumping during testing.
5. Laser Diffraction Analysis: The Microtrac instrument uses laser diffraction to measure the size and distribution of particles in the sample.
6. Data Analysis and Reporting: The data is analyzed to generate a detailed particle size distribution report.

Microtrac Testing Applications in Food Production:

Microtrac testing provides valuable insights for:

• Confirming Mixture Ratios: Ensuring accurate proportions of ingredients.
• Process Control (Milling and Comminution): Optimizing particle size reduction processes.
• Process Control (Emulsion Stability): Ensuring the creation of stable emulsions with desired droplet sizes.
• Troubleshooting: Identifying the cause of inconsistencies or changes in materials.
• System Conveyance: Understanding how particle size affects the flow and handling of materials.
• Blending Efficiency: Assessing the uniformity of blends and identifying potential segregation issues.

Microtrac vs. Sieve Testing: Choosing the Right Method

Selecting the optimal particle size analysis method depends on your specific needs and the characteristics of your sample. Both Microtrac (laser diffraction) and sieve testing offer valuable insights, but they differ in their capabilities and suitability. Here's a guide to help you choose the best option for your needs:

Key Considerations:

• Size Range:
  • Microtrac: Measures particle sizes down to 0.01 micrometers (µm).
  • Sieve Testing: The smallest sieve size available at Medallion Labs is 37 µm.
  • Implication: Microtrac is ideal for analyzing very fine particles, while sieve testing is better suited for coarser materials.
• Sample Type:
  • Microtrac: Can accommodate a wider variety of samples, including those that are sticky or tend to clump.
  • Sieve Testing: Requires free-flowing, non-clumping samples. Sticky or agglomerated materials can clog the sieves and lead to inaccurate results.
  • Implication: For powders that flow freely, sieve testing can be a good option. For more challenging samples, Microtrac is often preferred.
• Precision and Detail:
  • Microtrac: Provides a detailed particle size distribution, identifying and measuring multiple size fractions within the sample.
  • Sieve Testing: Quantifies the amount of material retained on or passing through each sieve. It cannot differentiate between particles of slightly different sizes within the same fraction.
  • Implication: Microtrac offers higher precision and more detailed information about the particle size distribution.
• Particle Shape:
  • Microtrac: Can accommodate both spherical and rod-shaped particles, providing size distribution data for both.
  • Sieve Testing: Best suited for spherical particles.
  • Implication: If your sample contains a mix of particle shapes, Microtrac provides a more comprehensive analysis.
• Historical Data:
  • Sieve Testing: If you need to compare current results to historical data obtained using sieve testing, it's best to continue using the same method for consistency.
  • Microtrac: If historical data is not a primary concern, Microtrac can provide a more meaningful and detailed analysis.
• Solubility:
  • Microtrac: Requires the sample to be insoluble in the carrier fluid (typically water or isopropyl alcohol).
  • Sieve Testing: Not affected by solubility.
  • Implication: If your sample dissolves in common carrier fluids, sieve testing may be the better choice.
• Cost:
  • Sieve Testing: Generally, more affordable than Microtrac testing.
  • Microtrac: Offers a higher level of detail and precision, which may justify the higher cost for certain applications.
  • Implication: Consider your budget and the level of detail required when making your decision.

Solve Your Food Testing Challenges with Medallion Labs

• Are you facing challenges related to particle size, dispersion, or product consistency? Microtrac testing at Medallion Labs provides the insights you need to overcome these hurdles and achieve optimal results.

• We offer a comprehensive suite of testing services, including physical, chemical, and microbiological analyses. To learn more about our capabilities and how we can help you, please consult our technical data sheets and online order form. We're committed to providing cost-effective solutions that meet your specific testing requirements.

• Let Medallion Labs be your trusted partner for food testing. Connect with us or call 1-800-245-5615 to discuss your challenges and explore how our expertise can help you achieve your goals.