A new method for the simultaneous determination of vulcanized rubber additives by Fourier transform infrared (FT-IR) spectrophotometry using partial least-squares regression (PLSR) for multivariate calibration was developed. The effect of various wavenumber ranges and the use of the absorbance and first-derivative spectral modes on performance were studied by applying the method to three different sample batches containing several additives in different proportions, all of which were resolved with satisfactory results.
BlancoM.CoelloJ.IturriagaH. and MaspochS, and BertranE., Fresenius' J. Anal. Chem.340, 410 (1991).
3.
Near Infra-red Spectroscopy: Bridging the Gap between Data Analysis and NIR Applications, HildrumK. I.IsakssonT. and NæsT, and TandbergA., Eds. (Ellis Horwood, London, 1992).
4.
HaalandD. M. and EasterlingR. G., Appl. Spectrosc.36, 665 (1982).
5.
HobertH. and MeyerK., Fresenius' J. Anal. Chem.344, 178 (1992).
6.
DonahueS. M. and BrownC. W and ObremskiR. J., Appl. Spectrosc.42, 353 (1988).
7.
GuzmanM.DeBangM. and RůžičkaJ, and ChristianG. D., Proces. Control Qual.2, 113 (1992).
8.
CarlR., Fresenius' J. Anal. Chem.339, 70 (1991).
9.
VigerustB.KolsetK.NordensonS. and HenriksenA, and KlevelandK., Appl. Spectrosc.45, 173 (1991).
10.
MartensH. and NæsT., Multivariate Calibration (John Wiley and Sons, New York, 1991).
11.
WoldS., Technometrics20, 397 (1978).
12.
BremanL. and FriedmanJ. H., J. Am. Stat. Assoc.80, 580 (1985).
13.
HaalandD. M. and ThomasE. V., Anal. Chem.60, 1193 (1988).
14.
LevillainP. and FompeydieD., Analusis14, 1 (1986).
15.
OttoM. and WegscheiderW., Anal. Chem.57, 63 (1985).