Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Effect of Test Portion Mass on Vitamin A Testing in Animal Feed Materials.

Journal of AOAC International·2021

Same author

Sample quality criteria.

Journal of AOAC International·2015

Same author

Considerations in sampling of water.

Journal of AOAC International·2015

Same author

Considerations for sampling contaminants in agricultural soils.

Journal of AOAC International·2015

Same author

QC of sampling processes- a first overview: from field to test portion.

Journal of AOAC International·2015

Same author

Considerations for inference to Decision Units.

Journal of AOAC International·2015

Same journal

Single-Laboratory Validation of Simultaneous Determination of Aflatoxins in Nutraceuticals following immune-affinity Column Cleanup and Liquid Chromatography Tandem Mass Spectrometry Analysis.

Journal of AOAC International·2026

Same journal

Determination of Bromoform in Seaweed, Oil, and Animal Feed by GC-MS/MS: AOAC Official Method 2026.01, First Action.

Journal of AOAC International·2026

Same journal

ICRF-Assisted Box-Behnken Design and Optimization for Rapid UPLC-PDA Determination of Dorzolamide Hydrochloride and Timolol Maleate in an Ophthalmic Preparation.

Journal of AOAC International·2026

Same journal

Advancing PFAS Analysis Through Scientific Publication.

Journal of AOAC International·2026

Same journal

A Green UPLC-UV Method for L-Ascorbic Acid Determination Based on a Biodegradable Chelating Agent and Synergistic Hydrophobic-Electrostatic Interactions.

Journal of AOAC International·2026

Same journal

Quantification of 24 Inorganic Impurities in Vismodegib and Idelalisib Anti-Cancer Drug Substances by Using ICP-MS.

Journal of AOAC International·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Aug 27, 2025

Loop-Mediated Isothermal Amplification for Screening Salmonella in Animal Food and Confirming Salmonella from Culture Isolation

Loop-Mediated Isothermal Amplification for Screening Salmonella in Animal Food and Confirming Salmonella from Culture Isolation

Published on: May 20, 2020

Piloting a Proficiency Testing Program for Laboratory Sampling of Animal Feed Materials.

Nancy J Thiex¹, Charles A Ramsey²

¹Thiex Laboratory Solutions LLC, 46747 214th St., Brookings, SD, USA.

Journal of AOAC International

|September 26, 2022

Summary

This summary is machine-generated.

A new proficiency testing program for laboratory sampling is feasible. This program can monitor sampling proficiency and compare different laboratory sampling methods for feed testing accuracy.

More Related Videos

Laboratory Protocol for Genetic Gut Content Analyses of Aquatic Macroinvertebrates Using Group-specific rDNA Primers

Laboratory Protocol for Genetic Gut Content Analyses of Aquatic Macroinvertebrates Using Group-specific rDNA Primers

Published on: October 5, 2017

A Fish-feeding Laboratory Bioassay to Assess the Antipredatory Activity of Secondary Metabolites from the Tissues of Marine Organisms

A Fish-feeding Laboratory Bioassay to Assess the Antipredatory Activity of Secondary Metabolites from the Tissues of Marine Organisms

Published on: January 11, 2015

Related Experiment Videos

Last Updated: Aug 27, 2025

Loop-Mediated Isothermal Amplification for Screening Salmonella in Animal Food and Confirming Salmonella from Culture Isolation

Loop-Mediated Isothermal Amplification for Screening Salmonella in Animal Food and Confirming Salmonella from Culture Isolation

Published on: May 20, 2020

Laboratory Protocol for Genetic Gut Content Analyses of Aquatic Macroinvertebrates Using Group-specific rDNA Primers

Laboratory Protocol for Genetic Gut Content Analyses of Aquatic Macroinvertebrates Using Group-specific rDNA Primers

Published on: October 5, 2017

A Fish-feeding Laboratory Bioassay to Assess the Antipredatory Activity of Secondary Metabolites from the Tissues of Marine Organisms

A Fish-feeding Laboratory Bioassay to Assess the Antipredatory Activity of Secondary Metabolites from the Tissues of Marine Organisms

Published on: January 11, 2015

Area of Science:

Agricultural Science
Analytical Chemistry
Laboratory Management

Background:

Laboratory sampling is a major source of error in feed testing.
Existing proficiency testing programs minimize sampling error by comminuting and blending samples.
There is currently no method to monitor sampling error among laboratories.

Purpose of the Study:

To assess the feasibility of a proficiency testing program for laboratory sampling methods.
To provide insights for developing a program to improve laboratory sampling performance.

Main Methods:

Identical, uncomminuted feed test items were fabricated and sent to volunteer laboratories.
Laboratories used their in-house procedures to select test portions.
A single laboratory analyzed all test portions for a given analyte to isolate sampling variability.

Main Results:

Relative Standard Deviations (RSD) varied by analyte and item, e.g., protein (5.08-5.23%), crude fat (3.45-5.67%), and vitamin A (26.9-33.9%).
Significant variability was observed across different analytes, indicating unique sampling challenges.
The results demonstrate the impact of sampling on overall feed testing accuracy.

Conclusions:

A proficiency testing program for laboratory sampling is feasible using manually prepared test items.
Data from such a program can effectively monitor laboratory sampling proficiency.
The program allows for comparison of the performance of various laboratory sampling methods.