Affiliation:
1. Department of Chemistry, Idaho State University, Pocatello, Idaho 83209
Abstract
In analytical chemistry, it is necessary to form instrument-dependent calibration models. Problems such as instrument drift, repair, or use of a new instrument create a need for recalibration. Since recalibration can require considerable costs and cause time delays, methods for calibration transfer have been developed. This paper shows that many of these approaches are based on the statistical procedure known as Procrustes analysis (PA). Transfer by PA methods is shown to involve translation (mean-centering), rotation, and stretching of instrument responses. This study investigates the ability of different forms of PA to transfer near-infrared spectra measured on two different instruments. Spectroscopic interpretations of translation, rotation, and stretching are provided. It is found for the data sets investigated that unconstrained forms of PA generally produce better results. It is also shown that translation is the key step for transformation of spectra and may often be all that is required.
Subject
Spectroscopy,Instrumentation
Cited by
46 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献