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Heterogeneous sample

Composition varies from place to place within a material

Homogeneous sample

Composition is the same throughout material

Randomly Heterogeneous sample

No knowledge of segregation of materials

Segregated Heterogeneous sample

Knowledge of segregation of materials


Two or more samples obtained separately by the same sampling procedure from the same target.


Two or more samples obtained in the laboratory from the same sample

Representative sample

Reflecting the composition of the target adequately, but not exactly.

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