Development of Attenuated Total Reflectance Mid-Infrared (ATR-MIR) and Near-Infrared (NIR) Spectroscopy for the Determination of Resistant Starch Content in Wheat Grains
Table 2
Wheat samples in the validation set and grain RS content determined by both the chemical method and the best ATR-MIR and NIR calibration models.
Wheat samples
Grain RS content (%)
Relative error (RE)
Chemical measured
ATR-MIR predicted
NIR predicted
ATR-MIR RE
NIR RE
Xiaokouhong
0.267 ± 0.011
0.332 ± 0.041
0.591 ± 0.085
24.345
121.348
Yu30691-1-3
0.615 ± 0.032
0.423 ± 0.032
0.834 ± 0.088
31.212
35.610
Hongpidongmai
0.784 ± 0.041
0.864 ± 0.065
1.019 ± 0.091
10.204
29.974
Tanori
0.887 ± 0.063
0.861 ± 0.073
0.661 ± 0.093
2.931
25.479
Hongpixiaomai
0.991 ± 0.068
1.160 ± 0.082
0.684 ± 0.082
17.053
30.979
PI94365
1.028 ± 0.065
0.998 ± 0.081
0.814 ± 0.091
2.918
20.817
Huadong6hao
1.172 ± 0.072
0.892 ± 0.093
0.937 ± 0.105
23.891
20.051
Tumangmai
1.230 ± 0.083
1.093 ± 0.101
1.506 ± 0.132
11.138
22.439
Mahon Demias
1.365 ± 0.085
1.216 ± 0.097
1.131 ± 0.139
10.916
17.143
Chixiaomai
1.508 ± 0.095
1.637 ± 0.105
1.054 ± 0.108
8.554
30.106
Baitiaoyu
1.725 ± 0.105
1.487 ± 0.127
1.398 ± 0.153
13.797
18.957
Mangxiaomai
2.288 ± 0.112
1.798 ± 0.153
1.587 ± 0.186
21.416
30.638
Lanhuamai
2.842 ± 0.117
2.200 ± 0.194
1.851 ± 0.225
22.590
34.870
RE, the ratio between the measured value minus the predicted value divided by the measured value.
