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Moisture nonuniformity and sampling errors in large cheddar cheese blocks.

D M Barbano1

  • 1Cornell University, Ithaca, NY 14853, USA.

Journal of AOAC International
|April 28, 2001
PubMed
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Cheese moisture content accuracy is impacted by nonuniform distribution. Sampling errors, not cheese variations, cause large moisture test differences in cheese blocks.

Area of Science:

  • Food Science
  • Dairy Technology
  • Quality Control

Background:

  • Nonuniform moisture distribution is a common issue in large cheese blocks.
  • Temperature gradients during cooling can drive moisture migration within cheese.
  • Accurate moisture content is crucial for cheese quality and process control.

Purpose of the Study:

  • To investigate the effect of moisture gradients on cheese sampling accuracy.
  • To identify sources of variation in moisture content testing within a cheese plant.

Main Methods:

  • Analysis of moisture distribution in 290 kg cheese blocks.
  • Measurement of moisture gradients from the center to the outer surfaces.
  • Evaluation of factors contributing to sampling errors.

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Main Results:

  • A significant moisture range (approx. 5%) was observed from the center to the surface of cheese blocks.
  • Moisture migration, driven by temperature gradients, created non-symmetrical moisture distribution.
  • Moisture gradients and core sample length significantly contributed to random and systemic sampling errors.

Conclusions:

  • Sampling errors are the primary cause of large variations in moisture tests.
  • Average moisture differences between vats are minimal, highlighting the importance of accurate sampling techniques.
  • Improved sampling strategies are needed to ensure reliable moisture content determination in cheese production.