Orthogonal Design Study on Factors Affecting the Determination of Common Odors in Water Samples by Headspace Solid-Phase Microextraction Coupled to GC/MS
Table 3
The experimental design based on Taguchi’s L32 (49) orthogonal array and the response of the peak area count by GC-MSa.
Exp. no. and order
Factorsb
Responsesc (peak area ×107)
A
B
C
D
E
F
G
2-MIB
GSM
1
40
10
300
15
2
200
5
0.462
1.305
2
40
30
500
25
2
240
5
1.782
5.285
3
40
40
600
15
3
220
6
2.214
7.223
4
40
20
400
25
3
260
6
2.155
8.261
5
40
30
500
30
5
220
7
1.843
6.323
6
40
10
300
20
5
260
7
0.734
2.423
7
40
20
400
30
7
200
8
2.013
6.054
8
40
40
600
20
7
240
8
2.234
7.568
9
50
40
500
20
3
200
5
2.971
8.734
10
50
20
300
30
3
240
5
2.225
8.334
11
50
10
400
20
2
220
6
0.835
2.568
12
50
30
600
30
2
260
6
2.644
8.467
13
50
20
300
25
7
220
7
2.325
8.407
14
50
40
500
15
7
260
7
3.173
9.462
15
50
30
600
25
5
200
8
2.828
8.532
16
50
10
400
15
5
240
8
1.122
3.586
17
60
10
600
30
7
220
5
2.587
7.256
18
60
30
400
20
7
260
5
3.105
9.637
19
60
40
300
30
5
200
6
3.235
11.38
20
60
20
500
20
5
240
6
3.013
8.467
21
60
30
400
15
3
200
7
3.089
9.435
22
60
10
600
25
3
240
7
2.793
7.315
23
60
20
500
15
2
220
8
2.958
8.316
24
60
40
300
25
2
260
8
3.273
11.49
25
70
40
400
25
5
220
5
2.843
10.78
26
70
20
600
15
5
260
5
2.772
15.85
27
70
10
500
25
7
200
6
2.336
9.886
28
70
30
300
15
7
240
6
3.131
13.41
29
70
20
600
20
2
200
7
2.563
13.27
30
70
40
400
30
2
240
7
2.656
12.78
31
70
30
300
20
3
220
8
2.895
12.92
32
70
10
500
30
3
260
8
2.324
8.737
In this table, the error term was not listed. bFactor A: extraction temperature (°C); Factor B: extraction time (min); Factor C: rotate-speed (rpm); Factor D: ionic strength (w/v, %); Factor E: desorption time (min); Factor F: desorption temperature (°C); and Factor G: solution pH. cPeak area was calculated by quantitative ions under SIM mode, and area rejection: 10,000; initial threshold: 1; and peak width: 0.04.
