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Title: Crude Oil Sampling For Custody Transfer Class # 5070
Author: James m. Strawn
Source: 2002 International School of Hydrocarbon Measurement
Year Published: 2002
Abstract: The purpose of this paper is to discuss automatic sampling systems, their ability to obtain representative samples of shipments, and how to know when a sample is representative. The question is, How do you know if a crude oil sample is representative? Samples look the same whether they are representative or not. Just by looking at the 5 gallons (or more) of sample in the receiver, mixing it and withdrawing two 50cc samples for the centrifuge test, or 100 or 200cc for distillation, or 1 cc for the Karl Fischer titration, how do you know it is representative of a 100,000 barrel shipment?

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