Mid-Infrared Spectroscopy for Coffee Variety Identification: Comparison of Pattern Recognition Methods

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">Method</td><td class="align_left">Wavenumbers (cm<sup>−1</sup>)</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">PCA loading</td><td class="align_left">835.0262, 911.2006, 1061.6211, 1268.9313, 1291.1086, 1322.9283, 1337.3918, 1374.9969, 1396.2101, 1398.1385, 1406.8167, 1418.3875, 1499.3831, 1511.9181, 1620.8765, 1633.4115, 1662.3385, 1741.4056, 1881.2195, 2315.1245, 2358.5151, 2359.4792, 2362.3721, 2927.4128, 3129.9019, 3148.2222, 3287.0718, 3479.9185, and 3546.4507</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

The selected wavenumbers by principal component analysis loadings.

Journal of Spectroscopy

tab1

Table 1

Table 1: Mid-Infrared Spectroscopy for Coffee Variety Identification: Comparison of Pattern Recognition Methods 