Participation in a proficiency rating program is a key quality requirement for analytical testing laboratories. For more than 75 years the AACC Laboratory Proficiency Rating Program (LPRP) has been an essential tool, trusted by food and feed laboratories worldwide to:

• Verify laboratory equipment operation
• Monitor the use of correct analytical techniques by laboratory personnel
• Verify the reliability of contract laboratories
• Ensure the accuracy of labeling information
• Identify opportunities to improve laboratory quality

LPRP subscribers get high-quality, standardized samples of current interest, proficiency rating reports, and awards.

What You Get

As a subscriber to the Laboratory Proficiency Rating Program, your laboratory will receive:

• Test Samples: Delivered monthly, bimonthly, or quarterly. See the available samples below.
• Protocols​: Outlining instructions for analyses and award criteria, and reporting deadlines.
• Secure Portal Access: Confidential result submission and access to your historical data.
• Performance Reports: Includes anonymized results of all participating labs, z-scores, consensus values, and kernel density plots. Reports are prepared using ISO 13528 robust statistics. Learn more about proficiency reports, certificates, and awards.

Available Series

We offer various samples to meet diverse laboratory needs. See details of each series below.

• Flour Analysis Category

  Series Code	Sample Type	Frequency	Analyses
  HW1	Hard Wheat Flour Sample	Monthly	Moisture, Ash, Protein, Falling Number, Wet Gluten, Dry Gluten, Gluten Index
  HW2	Hard Wheat Flour Sample	BiMonthly	Moisture, Ash, Protein, Falling Number, Diastatic Power
  SW1	Soft Wheat Flour Sample	BiMonthly	Moisture, Ash, Protein, Falling Number, pH
  ALTFLR	Non-Wheat Flour. Sources include chickpea, corn, lentil, oat, pea, quinoa, rice, et	BiMonthly	Moisture, Protein, Ash, Soluble Dietary FIber, Insoluble Dietary Fiber, Total Dietary Fiber, Total Starch, Water Holding Capacity, Screen Test
  SEM	Durum Semolina Sample	BiMonthly	Moisture, Ash, Protein, Falling Number, Speck Count, Screen Test, Minolta Color

• Label Analysis Category

  Series Code	Sample Type	Frequency	Analyses
  SUGAR	Grain-Based Food for Sugar Analysis	Monthly	Moisture, Fructose, Glucose, Sucrose, Maltose, Lactose
  VMP	Grain-Based Food or Pet Food for Analysis of Proximates, Vitamins and Minerals	BiMonthly	Proximates Moisture, Ash, Protein, Crude Fat (EE), Crude Fat (AH) Vitamins Vitamin A, Vitamin C, Thiamin, Riboflavin, Niacin, Vitamin B6, Vitamin B12, Vitamin E, Folic Acid, Pantothenic Acid, Biotin Minerals Iron, Calcium, Magnesium, Zinc, Copper, Potassium, Phosphorus, Manganese, Sodium, Selenium, Chromium
  DF	Grain-Based or Pulse-Based Food for Dietary Fiber Analysis	BiMonthly	Moisture, Soluble Dietary Fiber, Insoluble Dietary Fiber, Total Dietary Fiber, Beta-Glucan
  GF	Grain-Based Food Sample to measure Gluten Content	BiMonthly	Gluten (Gluten-Free Label)
  FEED	Grain-Based Feed or Pet Food Sample	BiMonthly	Moisture, Protein, Ash, Crude Fat (EE), Crude Fat (AH)

• Food Safety Category

  Series Code	Sample Type	Frequency	Analyses
  MICRO1	Flour Sample for Microbiological Analyses	Quarterly	Salmonella, Staphylococcus, Yeasts, Molds, Aerobic Plate Count, Coliforms, E.Coli
  MYCO	Ground Whole Grain for Mycotoxin Analysis (Corn, Wheat, Distillers Grains, Barley)	Quarterly	Aflatoxin, Fumonisin, DON/Vomitoxin, Zearalenone

• Rheology Testing Category

  Series Code	Sample Type	Frequency	Analyses
  ALV	Flour Sample for Alveograph	BiMonthly	Alveograph Analysis
  AMYL	Flour Sample for Amylograph	BiMonthly	Amylograph Analysis
  FARS	Flour Sample for Farinograph (Small Bowl)	BiMonthly	Farinograph Analysis, Valorimeter
  FARL	Flour Sample for Farinograph (Large Bowl)	BiMonthly	Farinograph Analysis, Valorimeter
  MIXO	Ground Whole Grain for Mixograph	BiMonthly	Moisture, Mixograph Absorption, Water Temp., Time to Peak Height, Height of Curve at Peak & 8 Min, Descending Slope
  RVA	Flour or Starch-Blend Sample for RVA Analysis	BiMonthly	Moisture, Stirring Number, 13-Min Pasting

Pricing

Sample fees vary depending upon the nature of the analytical procedures involved, the frequency, and the subscribers' location. See order form for current pricing.

Shipping rates are calculated on a per-shipment basis. Shipping will be combined wherever possible.

Laboratory Reference Samples

Laboratory reference samples offer an additional way for laboratories to check their accuracy. Values have been determined for the samples through a collaborative method study.

The reference sample available is Total Dietary Fiber (TDF). The samples are held in cold storage to maintain product consistency over time.

To purchase a reference sample, contact us at checksample@cerealsgrains.org.

Sample Type and Size: Dietary Fiber, 50g

Check Sample Code: TDF

Price (includes shipping)

• List Price: $300​