Abstract
Staling of bread is a major source of food waste and efficient monitoring of it can help the food industry in the development of anti-staling recipes. While the staling fingerprint in the mid-infrared region is fairly well established this paper set out to find the most informative parts of the near-infrared spectra with respect to staling. For this purpose, two-dimensional correlation spectroscopy on near- and mid-infrared spectra of wheat bread crumb during aging was employed for the first time. The important mid-infrared absorption band at 1047 cm−1 related to amylopectin retrogradation was found to correlate positively with increased bread hardness and to co-vary with the near-infrared band at 910 nm in the short wavelength region (r2 = 0.88 to hardness), the near-infrared band at 1688 nm in the 1. overtone region (r2 = 0.97 to hardness) and to the near-infrared band in the long wavelength region at 2288 nm (r2 = 0.97 to hardness). The spectral information from the first principal component on near-infrared and the first principal component on mid-infrared was found to be highly correlated by a r2 = 0.98. It is demonstrated that the major bread staling processes such as amylopectin retrogradation and water loss can be followed with both near- and mid-infrared spectroscopy.
| Original language | English |
|---|---|
| Journal | Journal of Cereal Science |
| Volume | 75 |
| Pages (from-to) | 92-99 |
| Number of pages | 8 |
| ISSN | 0733-5210 |
| DOIs | |
| Publication status | Published - 2017 |
Keywords
- 2DCOS
- Bread staling
- Mid-infrared spectroscopy
- Near-infrared spectroscopy