Laboratory Proficiency Program Series

AOCS offers more than 40 different series covering a wide array of testing skills and instrumentation. Participation counts towards ISO 17025 requirements. Successful completion of yearly series makes you eligible to apply for Approved Chemist status.

The AOCS Laboratory Proficiency Program (LPP) is the world's most extensive and respected collaborative proficiency testing program for oil- and fat-related commodities, oilseeds, oilseed meals, edible fats and plant proteins. More than 500 chemists participate to verify and demonstrate their lab's quality control..

Participants use AOCS or similar methods for sample analysis and then compare their results with a large cross-section of other laboratories using the same methods and samples.

Data submission and storage:
Participants log in and submit results on their personal dashboard, where they can also access their reports from the past five years.

Expert assistance available:
Each LPP series is supported by a committee of experts in the field who can answer questions related to testing method, results or both.

Comprehensive reports:
Participants receive quarterly reports that contain results of all participating labs (participant information is kept confidential) as well as a summary statistical analysis of their results including consensus mean and standard deviation, z-score (with chart) and a Kernel density plot. After the 4th quarter, participants receive a proficiency report containing a performance evaluation for all participants for the entire LPP year.

To help participants understand the contents of their reports, Xin Wu, Technical Services Manager for AOCS, presented a walkthrough on how to interpret laboratory proficiency reports.

Enrollment:
There are four quarters in an AOCS LPP year, with the first quarter starting on July 1. Participants are free to enroll in any quarter. However, to be eligible for the AOCS Laboratory Proficiency Program Award, participants have to be enrolled for all four quarters in the same LPP year.

Sample preparation:
Some activities may be subcontracted.

AOCS LPP Timeline (.pdf)

2020-2021 LPP Award Winners (.pdf)

A2LA Scope of Accreditation (.pdf)

To get started: Choose the series you need below and click on “Enroll Now.”

Available Series

LPP
Analyst
log in


To renew: Log into your AOCS account to pay your proforma invoice in the “My Account” page.

Contact: If you need to make any changes to your proforma, or have any questions, please contact Dawn Shepard by phone at +1-217-693-4810.


Sample(s) in this series
Corn Meal

Determination
Aflatoxins B1, B2, G1, and G2     

Test Method
User-Specified Method

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Sample(s) in this series
Cottonseed Meal

Determination
Aflatoxins B1, B2, G1, and G2

Test Method
User-Specified Method 

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Sample(s) in this series
Peanut Paste

Determination
Aflatoxins B1, B2, G1, and G2

Test Method
User-Specified Method

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Sample(s) in this series
Pistachio and Almond

Determination
Aflatoxins B1, B2, G1, and G2

Test Method
User-Specified Method 

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Sample(s) in this series
Corn Meal

Determination
Total Aflatoxins 

Test Method
Corn Meal Test Kit

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Sample(s) in this series
Peanut Paste

Determination
Total Aflatoxins

Test Method
Peanut Paste Test Kit

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Sample(s) in this series
1st quarter sample: Whole Egg Powder and Egg Yolk Powder
2nd quarter sample: Mixed Whole Egg, Egg Yolk Powder and Desiccated Cheese Powder
3rd quarter sample: Desiccated Powdered Turkey and Desiccated Powdered Chicken
4th quarter sample: Desiccated Powdered Beef and Desiccated Powdered Milk

Determination
Cholesterol

Test Method
AOAC 994.10

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Sample(s) in this series
Cottonseed Oil

Determination
Bleached Color
Free Fatty Acids
Moisture and Volatiles
Refined Color
Soap

Test Method
Cc 8a-52
Ca 5a-40
Ca 2b-38
Cc 13b-45 or Cc 13j-97
Cc 17-95

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Sample(s) in this series
Corn Meal

Determination
Ash* 
Crude Fat
Crude Fiber
Moisture
Protein

Test Method
User Specified
AOAC 920.39, 945.16, or 2003.06
AOAC 978.10 or Ba 6a-05 (filterbag)
NFTA 2.2.2.5 (105 C/3 hr)
AOAC 990.03 (Combustion) or 2001.11 (Kjeldahl)

*Optional test

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Sample(s) in this series
1st quarter samples: Margarine Oil and Vegetable Shortening
2nd quarter sample: Emulsified Shortening
3rd quarter sample: Vegetable Shortening
4th quarter samples: Emulsified Shortening and Vegetable Shortening

Determination
AOCS Color Red
Capillary Melting Point*
Free Fatty Acids
Iodine Value
Lovibond Color*
Mettler Dropping Point
α-Monoglycerides*
OSI*
Peroxide Value
Solid Fat Content

Test Method
Cc 13b-45 or Cc 13j-97
Cc 1-25
Ca 5a-40
Cd 1d-92
Cc 13e-92 or Cc 13j-97
Cc 18-80
User-Specified
Cd 12b-92
Cd 8b-90
Cd 16-81 or Cd 16b-93

*Optional test

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Sample(s) in this series
Animal Feed

Determination
Ingredient Identification by Microscope

Test Method
AAFCO Terminology

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Sample(s) in this series
Fish Meal

Determination
Acid Value
Ash
Crude Protein
Moisture
Ammonia Nitrogen 
Oil (Petroleum Ether)
Pepsin Digestibility

Test Method
Cd 3d-63
Ba 5a-49
Ba 4d-90 or Ba 4e-93 (Dumas)
Ba 2a-38
AOAC 920.03
Ba 3-38
AOAC 971.09


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Sample(s) in this series
Corn Meal

Determination
B1, B2, B3, and Total

Test Method
User-Specified Method

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Sample(s) in this series
1st quarter samples: Palm Oil and Soybean Oil
2nd quarter samples: Vegetable Shortening and Cottonseed Oil
3rd quarter samples: Canola Oil and Coconut Oil
4th quarter samples: Sunflower Oil and Olive Oil

Determination
Fatty Acid Composition
Iodine Value (calculated)*

Test Method
Ce 1a-13
Cd 1c-85

*Optional test

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Sample(s) in this series
Marine Oil

Determination
Acid Value
p-Anisidine Value
Fatty Acid Composition
Peroxide Value
Totox Value

Test Method
Cd 3d-63
Cd 18-90
Ce 1i-07, GOED Monograph, USP 401 or Ph Eur 2.4.29
Cd 8b-90
Calculation (2 × PV + AN)

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Sample(s) in this series
Marine Oil

Determination
AOCS Color*
p-Anisidine Value
Free Fatty Acids
Gardner Color*
Insoluble Impurities
Iodine Value
Moisture
Peroxide Value

Test Method
Cc 13b-45 or Cc 13j-97
Cd 18-90
Ca 5a-40
Td 1a-64
Ca 3a-46
Cd 1d-92
Ca 2b-38
Cd 8b-90

* Optional test

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Sample(s) in this series
Marine Oil

Determination
Fatty Acid Composition

Test Method
Ce 1b-89 or Ce 1i-07

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Sample(s) in this series
October 1:
Coconut Oil – RBD
MCT Oil C8
Palm Kernel Oil – RBD

January 1:
Coconut Oil – RBD
MCT Oil 60/40 (Medium Chain Triglyceride)
MCT Oil

Determination
p-Anisidine Value
Fatty Acid Composition
Free Fatty Acids
Iodine Value
Moisture
Peroxide Value

Test Method
Cd 18-90
Ce 1j-07
Ca 5a-40
Cd 1d-92
Ca 2b-38
Cd 8b-90

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Sample(s) in this series
Ground Almonds

Determination
Moisture

Test Method
User-Specified

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Sample(s) in this series
1st quarter sample: Crude Coconut Oil
2nd quarter sample: RB Palm Oil
3rd quarter sample: Crude Safflower Oil
4th quarter sample: Crude Sunflower Oil

Determination
AOCS Color Red
Free Fatty Acids
Iodine Value
Mass/Unit Volume
Saponification Value

Test Method
Cc 13b-45 or Cc 13j-97
Ca 5a-40
Cd 1d-92
Cc 10c-95
Cd 3-25

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Sample(s) in this series
1st quarter samples: Whole Milk Powder and Infant Formula
2nd quarter samples: Dessert Ingredient I Chocolate Pudding and Dessert Ingredient II Powdered Chocolate 
3rd quarter samples: Cheese Powder and Egg Powder
4th quarter samples: Mayonnaise and Salad Dressing

Determination
Fatty Acid Composition
Minerals*
Total Fat
Total Protein
Vitamin A*
Vitamin D*
Vitamin E*

Test Method
Ce 1j-07
AOAC 985.35 or 984.27
User-Specified
User-Specified
AOAC 992.04 or 992.06
AOAC 992.26
AOAC 992.03

*Optional test

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Sample(s) in this series
1st quarter samples: Soybean Meal and Canola Meal
2nd quarter samples: Peanut Meal and Soybean Meal
3rd quarter samples: Cottonseed Meal and Soybean Meal
4th quarter samples: Safflower Meal and Protein Concentrate

Determination
Crude Fiber
Moisture
Nitrogen
Oil (Petroleum Ether)

Test Method
Ba 6-84
Ba 2a-38
Ba 4d-90 or Ba 4e-93
Ba 3-38

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Sample(s) in this series
Olive Oil

PART A
Determination
Delta K (UV Extinction)
K270, K232, K225*
Free Fatty Acids
Peroxide Value


Test Method
COI/T.20/Doc.19-Rev3 or AOCS Ch 5-91
COI/T.20/Doc.19-Rev3 or AOCS Ch 5-91
Ca 5a-40
Cd 8b-90

PART B
Determination
Diacylglycerols*
Fatty Acid Composition

Pyropheophytin*
Triglycerides (ECN 42) 


Test Method
ISO 29822
COI/T.20/Doc. 17, COI/T.24-2001, ISO 5508,
AOCS Ch 2-91 or AOCS Ce 2-66
ISO 29841
COI/T.20/Doc. 20-2010 or AOCS Ce 5b-89

PART C
Determination
Biophenols*
Contents of 2-Glycerol
Monopalmitate*  
Sterenes*
Sterols

Stigmastadienes
Waxes


Test Method
COI/T.20/Doc. 29-2017
COI/T.20/Doc. 23-2006

COI/T.20/Doc. 16-2001              
COI/T.20/Doc.30-2013, ISO 12228-2 1999
or AOCS Ch 6-91              
COI/T.20/Doc. 11-2001 or AOCS Cd 26-96              
COI/T.20/Doc. 18-2003, COI/T.20/Doc. 28-2017
or AOCS Ch 8-02              
               

*Optional test

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Sample(s) in this series
Olive Oil

Determination
Extra Virgin, Virgin & Lampante

Test Method
International Olive Council guideline
COI/T.20/Doc. No 15/Rev.7;February 2015

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Sample(s) in this series
Palm Oil

Determination
Cloud Point
Free Fatty Acids
Iodine Value
Lovibond Color
Slip Melting Point*
Solid Fat Content

Test Method
MPOB P4.3 (alternate AOCS Cc 6-25)
MPOB P2.5 (alternate AOCS Ca 5a-40)
Cd 1d-92
MPOB P4.1 (alternate AOCS Cc 13e-92)
MPOB P4.2 (alternate AOCS Cc 3-25)
Cd 16b-93 or Cd 16-81

*Optional test

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Sample(s) in this series
Peanuts

Determination
Foreign Matter
Free Fatty Acids
Moisture
Nitrogen
Oil
Peroxide Value

Test Method
Ab 1-49
Ab 5-49
Ab 2-49
Ab 4-91 or Ba 4e-93
Ab 3-49
Cd 8b-90

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Sample(s) in this series
Soybean Oil

Determination
Phosphorus

Test Method
Ca 12-55

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Sample(s) in this series
1st quarter samples: Pinto Bean Powder and Black Bean Powder
2nd quarter samples: Red Bean Powder and Navy Bean Powder
3rd quarter samples: Chickpea Powder and Pinto Bean Powder
4th quarter samples: Yellow Pea Powder and Black Bean Powder

Determination
Crude Protein
Moisture and Volatile Matter
Ash
Fat
Crude Fiber
Dietary Fiber

Test Method
AOCS Ba 4e-93 or ISO 20483
AOCS Ba 2b-82 or Ba 2a-38
AOCS Ba 5a-49 or ISO 2171
AOCS Ba 3-38 or ISO 11085
AOCS Ba 6-84 or AOCS Ba 6a-05
User specified

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Sample(s) in this series
1st quarter samples: Margarine Oil and Vegetable Shortening
2nd quarter sample: Emulsified Shortening
3rd quarter sample: Vegetable Shortening
4th quarter samples: Emulsified Shortening and Vegetable Shortening

Determination
Solid Fat Content

Test Method
Cd 16b-93

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Sample(s) in this series
Soybeans

Determination
Crude Fiber*
Free Fatty Acids*
Moisture
Nitrogen
Oil

Test Method
Ba 6-84
Ac 5-41
Ac 2-41
Ac 4-91 or Ba 4e-93
Ac 3-44

*Optional test

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Sample(s) in this series
Soybean Oil

Determination
Free Fatty Acids
Lovibond Color*
Neutral Oil

Test Method
Ca 5a-40
Cc 13e-92 or Cc 13j-97
Ca 9f-57

*Optional test

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Sample(s) in this series
1st quarter samples: Sesame Seed Oil, Avocado Oil 
2nd quarter samples: Sunflower Oil, Flaxseed Oil
3rd quarter samples: Corn Oil, Canola Oil 
4th quarter samples: Palm Oil, Rice Bran Oil

Determination
p-Anisidine Value
Fatty Acid Composition
Free Fatty Acids
Iodine Value
Moisture
Peroxide Value

Test Method
Cd 18-90
Ce 1i-07
Ca 5a-40
Cd 1d-92
Ca 2b-38
Cd 8b-90

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Sample(s) in this series
Tallow and Grease

Determination
Free Fatty Acids
Insoluble Impurities
Moisture
Refined and Bleached Color
Titer
Unsaponifiable Matter

Test Method
Ca 5a-40
Ca 3a-46
Ca 2c-25 or Ca 2b-38
Cc 8d-55
Cc 12-59
Ca 6a-40

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Sample(s) in this series
Soybean Oil

Determination
Copper, Iron, Nickel

Test Method
Ca 18 -79

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Sample(s) in this series
Soybean Oil

Determination
Total trans Fatty Acids by GC
Total trans Fatty Acids by IR

Test Method
Ce 1h-05
Cd 14-95

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Sample(s) in this series
Soy flour
Raw soybeans
Defatted soymeal
Soy protein concentrate
Soy protein isolate
Hulless barley
Pea flour
Pea protein concentrate
Faba bean protein concentrate

Determination
Trypsin inhibitor

Test Method
Ba 12a-2020

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Sample(s) in this series
Unground Soybean Meal

Determination
Ash*
Crude Fiber
Moisture
Nitrogen
Oil 
Urease Activity

Test Method
Ba 5a-49
Ba 6-84
Ba 2a-38
Ba 4d-90 or Ba 4e-93
Ba 3-38 (petroleum ether)
Ba 9-58

*Optional test

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Sample(s) in this series
Soybean Oil

Determination
AOCS Color Red
Lovibond Red Color*

Test Method
Cc 13b-45 or Cc 13j-97
Cc 13e-92 or Cc 13j-97

*Optional test

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