Abstract
Procedures used to take a sample from a bulk lot are extremely important. Every individual item in the lot should have an equal chance of being chosen (called random sampling). Biases are introduced by sample selection methods if equipment and procedures used to select the sample prohibit or reduce the chances of any item in the lot from being chosen. Examples of bias in the sample selection process, shown in Fig.4.1, are illustrated with the use of a sampling probe that doesn’t allow larger particles into the probe, a probe that doesn’t reach every location in the shipment, and use of a single probing point in a poorly mixed lot.
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Notes
- 1.
Incremental samples: quantity of material taken from a single random place in the lot (Food and Agriculture Organization 2001b).
References
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Whitaker, T.B., Slate, A.B., Doko, M.B., Maestroni, B.M., Cannavan, A. (2011). Sample Selection. In: Whitaker, T., Slate, A., Doko, B., Maestroni, B., Cannavan, A. (eds) Sampling Procedures to Detect Mycotoxins in Agricultural Commodities. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-9634-0_4
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DOI: https://doi.org/10.1007/978-90-481-9634-0_4
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