How much iron ore (that assays at 10.18% Fe) must be used in an analytical procedure that is known to have a low bias of −0.15 g if an overall relative error of 0.48 ppth in the iron content is desired?

Principles of Instrumental Analysis
7th Edition
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Chapter26: An Introduction To Chromatographic Separations
Section: Chapter Questions
Problem 26.14QAP
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How much iron ore (that assays at 10.18% Fe) must be used in an analytical procedure that is known to have a low bias of −0.15 g if an overall relative error of 0.48 ppth in the iron content is desired?

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