Graphite Furnace Measurements

Although these factors are fairly similar to those described in Chapter 3, there are some relevant differences. In effect, in PCA (and hence in PCR), the factors explain most of the variance in the X-domain regardless of whether such variance is or is not related to the analyte, whereas in PLS they are calculated so that they explain not only variance in the spectral variables but also variance which is related to the property of interest. A typical example might be a series of graphite furnace measurements where a baseline shift appears due to some... 

Multielement determination (sequential or simultaneous) faster analysis time minimal chemical interaction detection limits and sensitivity fall in between that of flame and graphite furnace measurements. 

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