SIMPLIFIED EVALUATION OF THE SMALLEST SAMPLE MASS THAT SHOULD BE TAKEN FOR AN ACCURATE CHEMICAL ANALYSIS

Ricardo Rezende Zucchini

Abstract

Technology has been developed very much during the last decades. In order to get better materials, with precise chemical composition, electrical properties, thermal properties, etc, it is a must to be capable to accomplish chemical analysis of blends, sometimes dealing with components in very low levels. Today, there are a number of new analytical techniques which allows quantifying extremely low levels of analytes, even employing very small samples. However, using small samples could generate sampling errors. Experimental determination of the minimum sample masses in order to get good accuracy can be a very costly operation, and a time demanding one. In this paper is proposed a simple method to evaluate the minimum sample mass that should be used in chemical analysis, to get low dispersion results.

Keywords

Sampling, Sampling Constant, Precision, Particulate Matter

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PWC-2006-TC10-011u.pdf

DOI

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IMEKO TC

TC10 - Measurement for Diagnostics, Optimization and Control

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