Drawout
plate

Source temperature

tr
(min)

% m/z
95/107

% m/z
108/107

aArea
12/9 min

tr
(min)

2-MIB
% m/z
107/95

2-MIB
% m/z
108/95

 

 

 

 

 

 

 

 

 

3 mm

230

9.16

35

22

1.4

11.99

62

43

 

250

9.17

35

21

2.0

11.99

68

43

 

270

9.18

34

21

2.0

11.99

55

40

 

290

9.18

34

21

1.7

11.99

73

35

 

310

9.18

34

20

1.8

12.00

55

29

 

330

9.18

31

20

2.4

12.00

65

33

 

350

9.18

31

20

2.7

11.99

68

31

Mean

 

9.18

33

21

2.0

11.99

64

36

SD

 

0.01

2

1

0.4

0.01

7

6

RSD%

 

0.09

5.14

3.65

21.79

0.04

10.71

15.81

 

 

 

 

 

 

 

 

 

6 mm

230

9.19

21

14

2.2

12

64

20

 

250

9.19

23

15

3.1

12

54

30

 

270

9.18

33

19

3.7

11.99

46

31

 

290

9.18

33

21

3.4

11.99

44

28

 

310

9.19

35

21

3.8

11.99

41

25

 

330

9.19

26

15

3.2

12

40

25

 

350

9.19

30

20

3.9

12

39

16

Mean

 

9.19

29

18

3.3

12.00

47

25

SD

 

0.01

5

3

0.6

0.01

9

5

RSD%

 

0.05

18.94

17.24

17.49

0.05

19.42

21.66

aRatio of : Area of peak at ± 12.0 min /area of peak at ± 9.2 min
Table 11: SIM mass spectral analysis of composite 2-MIB/GSM standard by purge-and-trap: 30 ng/L in MQ.