Interesting article in Spectroscopy Europe :
Examining diffuse reflection and transmission spectra more thoroughly: Part 1. Instrument noise
Karl H. Norris (Consultant, 11204 Montgomery Road, Beltsville, MD 20702, USA)
A.M.C. Davies (Norwich Near Infrared Consultancy, 10 Aspen Way, Cringleford, Norwich NR4 6UA, UK)
The December - 2011 issue of Tony Davies Column, were Karl H. Norris (considered the father of Near Infrared) writes a useful article to look more carefully at the spectra.
How we can use the 4th derivative to study the effect of noise in our data.
Next issue will continue with the second part.