Office of the Texas State Chemist website

One Sample Strategy for Aflatoxin Risk Management in Texas

A voluntary program to protect consumers and facilitate commerce

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About the Program



The One Sample Strategy facilitates risk management by training your employees to accurately measure the level of aflatoxin in every incoming truckload of corn. Grain elevator employees who successfully complete a proficiency verification evaluation are qualified to analyze samples as designees of OTSC.

2016 Harvest Season Approved Locations PDF format

2015 Harvest Season Approved Locations PDF format

2014 Harvest Season Approved Locations PDF format

2013 Harvest Season Approved Locations PDF format

2012 Harvest Season Approved Locations PDF format

2011 Harvest Season Approved Locations PDF format


Highlights


EQUIPMENT:
Firms use approved equipment to perform the primary program activities: sampling, grinding and aflatoxin analysis.

EMPLOYEE TRAINING & PROFICIENCY VERIFICATION:
Firms assign two or more employees to perform each of the three primary program activities. Employees are trained by OTSC to use USDA-approved methods, and become OTSC designees after successfully completing proficiency verification.

SAMPLING:
Employees use a 6’ spiral hand probe and follow USDA representative sampling patterns to collect a 5 pound (minimum) sample from each incoming truckload of corn.

GRINDING:
Each sample is ground in a Romer mill until at least 70% of the particles pass through a 20 mesh sieve.

AFLATOXIN ANALYSIS:
Firms use testing methods approved by USDA and validated by OTSC to measure aflatoxin above 100 ppb, and adoption of One Sample Strategy quality control techniques to ensure accurate aflatoxin measurement.

RECORDKEEPING & REPORTING
A Certificate of Analysis is issued for each sample. Equipment maintenance and employee proficiency records are also kept by the firm.

OTSC MONITORING & CORRECTIVE ACTIONS:
OTSC field investigators visit participating firms on a weekly basis to review records and observe employee performance.