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Chemical and Biological Technologies in Agriculture

Table 3 Concentrations of volatile compounds identified in soybean (Glycine max L.) extracts with DRP–LLE

From: Analysis of volatile compounds of black bean, mung bean, and soybean extracts prepared with distillation under reduced pressure–continuous liquid–liquid extraction and hot water extraction

Compounds

KI

KI

(Ref.)

Identification

Peak area ratio1

Distillation at 50 °C

Distillation at 60 °C

Distillation at 70 °C

355–500 μm

500–710 μm

Whole size

355–500 μm

500–710 μm

355–500 μm

355–500 μm

500–710 μm

Whole size

Aldehydes

 Hexanal

1074

1084

MS2, KI3, Co4

2.127 ± 0.065a,A

1.004 ± 0.030a,B

0.289 ± 0.009a,C

1.255 ± 0.037b,A

1.495 ± 0.044b,B

0.148 ± 0.004b,C

1.147 ± 0.035c,A

2.003 ± 0.062c,B

0.202 ± 0.006b,C

 Nonanal

1412

1395

MS, KI, Co

0.414 ± 0.012a,A

0.190 ± 0.006a,B

0.218 ± 0.007a,C

0.214 ± 0.007b,A

0.204 ± 0.006bc,AB

0.233 ± 0.007b,C

0.445 ± 0.013c,A

0.191 ± 0.006ab,BC

0.188 ± 0.005c,C

 Benzaldehyde

1521

1527

MS, KI, Co

0.678 ± 0.020a,A

0.646 ± 0.020a,A

0.201 ± 0.006a,B

0.599 ± 0.019b,A

1.271 ± 0.040b,B

0.144 ± 0.004b,C

0.606 ± 0.018b,A

0.881 ± 0.026c,B

N.D

Total aldehydes

   

3.219 ± 0.098

1.840 ± 0.055

0.708 ± 0.022

2.067 ± 0.063

2.969 ± 0.090

0.525 ± 0.016

2.199 ± 0.067

3.075 ± 0.093

0.390 ± 0.011

Alcohols

 2-Methyl-1-butanol

1194

1208

MS, KI, Co

5.259 ± 0.161a,A

1.963 ± 0.060a,B

1.361 ± 0.042a,C

0.982 ± 0.030b,A

1.716 ± 0.053b,B

0.512 ± 0.016b,C

1.183 ± 0.036c,A

1.020 ± 0.031c,B

1.098 ± 0.034c,AB

 1-Hexanol

1368

1360

MS, KI, Co

4.112 ± 0.127a,A

3.000 ± 0.092a,B

1.606 ± 0.049a,C

3.266 ± 0.100b,A

4.612 ± 0.141b,B

0.982 ± 0.030b,C

4.070 ± 0.125a,A

3.503 ± 0.106c,B

1.069 ± 0.033b,C

 cis-3-Hexen-1-ol

1401

1391

MS, KI, Co

0.778 ± 0.024a,A

0.251 ± 0.008a,B

0.109 ± 0.003a,C

0.398 ± 0.012b,A

0.333 ± 0.011ab,AB

0.026 ± 0.001a,C

0.585 ± 0.018c,A

0.299 ± 0.010ab,B

5.772 ± 0.176b,C

 3-Octanol

1417

1394

MS, KI, Co

0.718 ± 0.022a,A

0.653 ± 0.020a,B

0.479 ± 0.015a,C

0.400 ± 0.012b,A

0.845 ± 0.026b,B

0.334 ± 0.010b,C

0.471 ± 0.014c,A

0.538 ± 0.016c,B

0.319 ± 0.009b,C

 1-Nonanol

1672

1666

MS, KI, Co

0.255 ± 0.008a,A

N.D

0.106 ± 0.003a,C

0.138 ± 0.004b,A

0.246 ± 0.007a,C

0.175 ± 0.005b,B

0.175 ± 0.005c,A

0.174 ± 0.005b,A

0.061 ± 0.002c,C

 Benzyl alcohol

1891

1880

MS, KI, Co

1.529 ± 0.047a,A

1.052 ± 0.033a,B

0.556 ± 0.017a,C

1.141 ± 0.034b,A

1.508 ± 0.045b,B

0.678 ± 0.021b,C

1.062 ± 0.033c,A

0.741 ± 0.023c,B

0.493 ± 0.015c,C

 Phenethyl-alcohol

1930

1929

MS, KI, Co

0.239 ± 0.007a,A

0.229 ± 0.007a,B

0.053 ± 0.002a,C

0.189 ± 0.006b,A

0.288 ± 0.009b,B

0.041 ± 0.001b,C

0.118 ± 0.004c,A

0.123 ± 0.004c,A

0.043 ± 0.001b,B

Total alcohols

   

12.890 ± 0.394

7.148 ± 0.219

4.269 ± 0.130

6.514 ± 0.199

9.547 ± 0.291

2.747 ± 0.084

7.665 ± 0.234

6.397 ± 0.195

8.853 ± 0.271

Total volatile

   

16.109 ± 0.492a,A

8.988 ± 0.275ab,B

4.977 ± 0.152a,C

8.581 ± 0.261b,A

12.517 ± 0.381c,B

3.271 ± 0.099b,C

9.864 ± 0.301c,A

9.472 ± 0.289b,AB

9.243 ± 0.283c,B

  1. 1All concentration values are presented as mean ± standard deviation. 2MS, identification of mass spectrum with reference to the NIST mass spectrum library, 3Kovats retention index on DB-WAX; KI (Ref), Retention index on DB-WAX in the NIST database.), 4Co-injection with authentic chemicals Mean values with different letters (a, b, c—extraction temperature/A, B, C—particle size) in the same horizontal line indicate significant differences according to Duncan’s test (p < 0.05). N.D.: not detected
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