Assessment of wool chlorination by infrared spectroscopy

Woodhead, Andrea L.; Harrigan, F.J.; Church, Jeffrey S.

doi:10.1016/s0924-2031(97)00040-4

Cited by 9 publications

(3 citation statements)

References 10 publications

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“…Principal component analysis (PCA) is a well-established chemometric method that can be used to assess spectral similarities between different samples. [11][12][13][14] For all chemometric experiments, a standard base set of preprocessing conditions including mean centering, baseline correction, and unit area normalization were utilized. Experiments were then carried out to assess the effects of second-derivative preprocessing and spectral region selection on the correlation observed between spectra.…”

Section: Resultsmentioning

confidence: 99%

Spectroscopic Assessment of Australian Cotton Waxes

Church

Woodhead

2006

Appl Spectrosc

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An investigation into the spectroscopic analysis of cotton waxes on Australian cottons was undertaken. The chemical composition of cotton wax is complex and contains a number of lipid classes. Infrared transmission spectroscopy coupled with principal component analysis was found to be capable of discriminating between solvent-extracted cotton waxes with differences in their alkyl functionality. Based on high-performance thin-layer chromatography (HPTLC) results, these differences were associated with an increase in levels of the alkane wax component. On the basis of these results, a photo-acoustic spectroscopic method was developed that could be used to distinguish raw cottons on the basis of these differences. This method was utilized to screen cottons from the Cotton Seed Distributors 2001 seed trial. A preliminary assessment of the scouring and dyeing properties of the various cottons, identified using the photo-acoustic method, was carried out. The results tended to confirm that cottons with increased alkyl functionality, most likely associated with alkane wax, were more difficult to remove and residual wax on the fiber acted as a barrier to dyestuff penetration, thus lowering color yield.

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Section: Resultsmentioning

confidence: 99%

Spectroscopic Assessment of Australian Cotton Waxes

Church

Woodhead

2006

Appl Spectrosc

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“…at 1040 cm 01 and 1024 cm 01 respectively (16,36). No Infrared spectra were collected using a Perkin-Elmer Sys-detectable change in the spectra can be observed, which tem 2000 Fourier transform infrared spectrometer equipped indicates that the t-BuOK/t-BuOH treatment has not with a SPECAC Model 11900 variable angle attenuated total changed the level of oxidation of the sulfur species present reflectance (ATR) accessory and a narrow band MCT detec-in the upper 70 nm of the wool fiber surface.…”

Section: Fig 1-continuedmentioning

confidence: 99%

“…A solution of 0.1 M potassium tert-butoxide in tert-butanol (t-BuOH) was prepared through the reaction of clean R. J. Denning and G. B. Guise. Chlorinated wool was obtained from a process described elsewhere (36). Both the potassium with dry, freshly distilled t-BuOH (35).…”

Section: Introductionmentioning

confidence: 99%