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Corn Export Cargo Quality Report 2011/2012

Contents

  1. Export Cargo Quality Highlights
  2. Survey Overview
  3. Grade Factors and Moisture
  4. Chemical Composition
  5. Physical Factors
  6. Mycotoxins
  7. Corn Export System
  8. U.S. Export Corn Flow
  9. Impact of the Corn Market Channel on Quality
  10. U.S. Government Inspection and Grading
  11. Survey Design and Sampling
  12. Statistical Considerations
  13. Corn Grading Factors
  14. Chemical Composition
  15. Physical Factors
  16. Grade Requirements and Conversions
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Chemical Composition

NIR Proximate Analysis – Corn

Proximates are the major components of the grain. For corn, the NIR Proximate Analysis includes oil content, protein content, and starch content (or total starch). This procedure is nondestructive to the corn.

Chemical composition tests for protein, oil, and starch were conducted using a 400–450 g sample in a whole-kernel Foss Infratec 1229 Near-Infrared Transmittance (NIRT) instrument. The NIRT was calibrated to chemical tests, and the standard error of predictions for protein, oil, and starch were about 0.2%, 0.3%, and 0.5%, respectively. Results are reported on a dry basis percentage (percent of nonwater material).