Discrimination of Four Black Heartwoods Using FTIR Spectroscopy and Clustering Analysis

Fang MA; An-min HUANG; Qiu-hui ZHANG

doi:10.3964/j.issn.1000-0593(2022)06-1915-07

Spectroscopy and Spectral Analysis, Volume. 42, Issue 6, 1915(2022)

Discrimination of Four Black Heartwoods Using FTIR Spectroscopy and Clustering Analysis

Fang MA1,1;... An-min HUANG2,2; and Qiu-hui ZHANG1,1; *; |Show fewer author(s)

Author Affiliations

¹1. MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, Beijing 100083, China

²2. Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China

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Figures & Tables(9)

Fig. 1. Four types of heartwood samples
(a): D. ebenum; (b): D. melanoxylon; (c): C. imberbe; (d): G. conjugate

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Fig. 2. FTIR spectra of experimental samples
a: D. ebenum; b: D. melanoxylon; c: C. imberbe; d: G. conjugate

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Fig. 3. FTIR spectra of Cellulose, Lignin and Calcium oxalate

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Fig. 4. The distances of D. ebenum (a), D. melanoxylon (b), C. imberbe (c) and G. conjugate (d)

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Fig. 5. 2DCOS-IR spectra and auto-peaks of D. ebenum (a), D. melanoxylon (b), C. imberbe (c) and G. conjugate (d)

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Table 1. Relative intensities of the characteristic peaks for 4 types of sample

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Table 1. Relative intensities of the characteristic peaks for 4 types of sample

	D. ebenum			D. melanoxylon			C. imberbe			G. conjugata
	H_{1 059}	H_{1 510}	H₇₈₁	H_{1 059}	H_{1 510}	H₇₈₁	H_{1 059}	H_{1 510}	H₇₈₁	H_{1 059}	H_{1 510}	H₇₈₁
1	0.980 6	0.508 5	0.067 7	0.815 9	0.983 0	0.054 7	0.652 2	0.584 8	0.546 7	0.896 1	0.676 1	0.048 4
2	1.078 0	0.552 4	0.068 5	0.782 8	0.964 1	0.049 7	0.659 0	0.561 8	0.466 7	0.910 6	0.678 8	0.075 6
3	1.130 1	0.573 8	0.065 9	0.863 8	0.908 0	0.028 3	0.708 2	0.561 6	0.513 1	0.975 8	0.712 7	0.063 1
4	1.185 7	0.605 1	0.073 8	0.848 2	0.970 5	0.064 5	0.613 3	0.568 4	0.560 9	1.026 9	0.740 3	0.063 4
5	0.877 6	0.707 0	0.152 1	0.845 1	1.006 8	0.065 6	0.625 8	0.642 5	0.497 8	0.885 4	0.639 6	0.024 9
6	0.946 0	0.757 0	0.150 4	0.792 7	1.029 3	0.089 6	0.665 0	0.667 3	0.500 6	0.903 7	0.613 2	0.061 4
7	0.989 9	0.792 4	0.143 2	0.804 5	0.899 1	0.045 7	0.700 5	0.696 0	0.519 2	0.963 2	0.668 5	0.015 7
8	1.093 8	0.855 8	0.138 0	0.861 9	0.933 8	0.049 6	0.709 6	0.571 2	0.407 4	0.926 9	0.678 4	0.059 1
9	0.819 3	0.551 6	0.070 9	0.891 2	0.991 1	0.027 7	0.609 0	0.584 4	0.521 3	0.930 8	0.638 7	0.063 5
10	0.842 5	0.560 1	0.067 1	0.928 1	1.023 1	0.032 6	0.610 0	0.523 7	0.539 4	0.958 8	0.639 9	0.062 2
11	0.872 0	0.570 0	0.064 7	0.968 1	0.821 6	0.085 6	0.509 7	0.511 5	0.535 2	0.709 0	0.537 4	0.006 3
12	0.956 7	0.612 7	0.064 5	0.775 1	1.180 4	0.081 2	0.541 8	0.536 7	0.562 2	0.894 6	0.661 5	0.002 3
13	0.999 5	0.635 1	0.063 3	0.860 9	0.834 6	0.044 2	0.565 5	0.580 8	0.594 3	0.578 1	0.445 5	0.000 9
14	0.914 9	0.489 0	0.136 2	0.816 7	0.937 4	0.070 4	0.643 9	0.564 9	0.507 6	0.820 8	0.636 7	0.085 3
15	0.951 0	0.495 0	0.076 4	0.799 8	0.976 9	0.069 4	0.642 4	0.549 3	0.608 0	0.908 1	0.662 1	0.048 5
$\overset{̅}{H}$	0.975 8	0.617 7	0.093 5	0.843 7	0.964 0	0.057 3	0.630 4	0.580 3	0.525 4	0.885 9	0.642 0	0.045 3
H_STD	0.103 7	0.107 9	0.036 0	0.052 8	0.093 2	0.019 3	0.056 5	0.049 5	0.047 7	0.108 0	0.068 5	0.027 1
H_RSD	0.106 3	0.174 7	0.385 3	0.062 6	0.086 3	0.337 8	0.089 6	0.085 4	0.090 9	0.121 9	0.106 7	0.599 7

Table 2. The validation result of experimental sample (Compare)

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Table 2. The validation result of experimental sample (Compare)

Material	Specified material	Identified material	Result	Correlation	Correlation Threshold
1	D. ebenum	D. ebenum	Passed	0.921 3	0.800 1
2	D. ebenum	D. ebenum	Passed	0.957 5	0.800 1
3	D. ebenum	D. ebenum	Passed	0.974 6	0.800 1
4	D. ebenum	D. ebenum	Passed	0.935 9	0.800 1
5	D. ebenum	D. ebenum	Passed	0.936 3	0.800 1
6	D. melanoxylon	D. melanoxylon	Passed	0.951 7	0.866 2
7	D. melanoxylon	D. melanoxylon	Passed	0.986 7	0.866 2
8	D. melanoxylon	D. melanoxylon	Passed	0.983 3	0.866 2
9	D. melanoxylon	D. melanoxylon	Passed	0.977 2	0.866 2
10	D. melanoxylon	D. melanoxylon	Passed	0.972 2	0.866 2
11	C. imberbe	C. imberbe	Passed	0.955 3	0.814 3
12	C. imberbe	C. imberbe	Passed	0.936 9	0.814 3
13	C. imberbe	C. imberbe	Passed	0.910 8	0.814 3
14	C. imberbe	C. imberbe	Passed	0.936 1	0.814 3
15	C. imberbe	C. imberbe	Passed	0.968 4	0.814 3
16	G. conjugata	G. conjugata	Passed	0.981 7	0.887 2
17	G. conjugata	G. conjugata	Passed	0.980 2	0.887 2
18	G. conjugata	Other	Failed	0.886 7	0.887 2
19	G. conjugata	G. conjugata	Passed	0.990 0	0.887 2
20	G. conjugata	G. conjugata	Passed	0.969 1	0.887 2

Table 3. Inter-class distances of experimental sample (SIMCA)
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Table 3. Inter-class distances of experimental sample (SIMCA)
Material D. ebenum D. melanoxylon C. imberbe G. conjugata
D. ebenum - 11.9 13.7 7.21
D. melanoxylon - - 27.9 4.72
C. imberbe - - - 15.8

Table 4. Classification performance report of experimental sample (SIMCA)

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Table 4. Classification performance report of experimental sample (SIMCA)

Material	D. ebenum	D. melanoxylon	C. imberbe	G. conjugata
Recognition rate/%	100(10/10)	100(10/10)	100(10/10)	100(10/10)
Rejection rate/%	100(30/30)	100(30/30)	100(30/30)	100(30/30)
Validation rate/%	100(5/5)	100(5/5)	100(5/5)	100(5/5)

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Fang MA, An-min HUANG, Qiu-hui ZHANG. Discrimination of Four Black Heartwoods Using FTIR Spectroscopy and Clustering Analysis[J]. Spectroscopy and Spectral Analysis, 2022, 42(6): 1915

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