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Comparison of two NIR systems for quantifying kaolinite in Weipa bauxites

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journal contribution
posted on 06.12.2017, 00:00 by Luke Mcarthur, Colin Greensill
Two laboratory-based near infrared systems were compared for the purpose of quantifying kaolinite within Weipa bauxites. The two systems were based on different instrument technologies, a Bruker MPA (multi-purpose analyser) FTNIR (Fourier transform near infrared) instrument, and a Foss Model 6500 pre-dispersive grating instrument. Systems were compared in terms of accuracy, robustness, sample throughput and ease of use. The MPA-based system was superior in terms of accuracy (root mean squared error of prediction (RMSEP) = 0.88%m/m), throughput and ease of use. The Model 6500 had an advantage of offering the most robust measurement with greater time stability and lower errors in repeated and repacked measurements. However, addition of a small number of temporally displaced and repacked samples in the calibration set improved robustness of the MPA system, matching the Model 6500.

Funding

Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)

History

Volume

18

Issue

11

Start Page

3463

End Page

3470

Number of Pages

8

ISSN

0957-0233

Location

UK

Publisher

Institute of Physics

Language

en-aus

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Faculty of Sciences, Engineering and Health; Process Engineering and Light Metals; TBA Research Institute;

Era Eligible

Yes

Journal

Measurement science and technology.