Abstrakt
With spectroscopic methods, e.g. near infrared (NIR) analysis, using a constant beam aperture, the effective scanning footprint will be different for a spinning Petri dish, a rolling bottle and a new spiral sampler configuration. This will significantly influence the analytical accuracy and precision of a NIR analytical determination of heterogeneous materials, for example barley with differing protein contents. Here we present the results from a bench-top experiment that evaluates the total analytical bias and precision characteristics for three alternative sample presentation approaches using a mixture of two plastic polymer pellets as a test material with significant heterogeneity. After removal of all incorrect sampling errors (ICS), there are still significantly varying correct sampling error [Fundamental Sampling Error (FSE) and Grouping and Segregation Error (GSE)] uncertainties associated with these standard analytical approaches–but there is a clear winner.
Originalsprog | Engelsk |
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Sider (fra-til) | 11-15 |
Antal sider | 5 |
Tidsskrift | NIR News |
Vol/bind | 25 |
Udgave nummer | 1 |
DOI | |
Status | Udgivet - feb. 2014 |
Programområde
- Programområde 3: Energiressourcer