Table 3 Intra and inter-day precision results of VOCs

Dichloromethane

1.94 ± 0.05

95.7

2.55

4.24 ± 0.18

84.7

4.27

5.04 ± 0.19

100.9

3.81

4.92 ± 0.17

98.3

3.40

1,1-Dichloroethane

1.86 ± 0.09

93.0

4.73

4.92 ± 0.28

98.3

5.74

5.16 ± 0.18

103.2

3.47

5.01 ± 0.19

100.3

3.80

Trichloromethane

1.97 ± 0.07

98.7

3.41

4.54 ± 0.08

90.8

1.67

4.95 ± 0.11

98.9

2.27

5.10 ± 0.11

102.0

2.07

1,2-Dichloroethane

1.99 ± 0.05

99.4

2.34

4.41 ± 0.11

88.2

2.60

4.88 ± 0.12

97.5

2.44

4.78 ± 0.10

95.6

1.92

Benzene

1.89 ± 0.08

94.5

4.13

4.75 ± 0.09

94.9

1.85

4.89 ± 0.12

97.7

2.41

4.76 ± 0.17

95.2

3.46

Trichloroethene

2.02 ± 0.11

101.0

5.27

4.75 ± 0.11

95.1

2.28

5.06 ± 0.19

101.3

3.83

5.05 ± 0.29

101.0

5.75

Bromodichloromethane

1.89 ± 0.04

94.5

2.09

4.34 ± ± 0.11

86.7

2.67

5.09 ± 0.13

101.9

3.12

5.00 ± 0.09

100.1

1.72

Toluene

1.99 ± 0.09

99.4

4.50

4.65 ± 0.09

93.0

1.90

4.83 ± 0.25

96.6

5.10

4.92 ± 0.26

98.4

5.36

Dibromochloromethane

1.84 ± 0.02

92.1

1.19

4.38 ± 0.17

87.5

3.97

5.05 ± 0.12

101.0

2.35

4.93 ± 0.13

98.7

2.63

Tetrachloroethene

1.97 ± 0.19

98.5

9.81

4.20 ± 0.15

83.9

3.51

5.09 ± 0.35

101.9

6.79

5.03 ± 0.29

100.5

5.78

Tetrachloromethane

1.99 ± 0.03

99.4

1.52

4.72 ± 0.12

94.3

2.54

4.91 ± 0.31

98.1

6.25

4.95 ± 0.12

99.1

2.46

1,1,1,2-Tetrachloroethane

1.87 ± 0.04

93.4

2.11

4.32 ± 0.08

86.5

1.77

5.02 ± 0.15

100.4

2.92

4.91 ± 0.12

98.2

2.36

Ethylbenzene

1.97 ± 0.11

98.4

5.38

4.74 ± 0.08

94.8

1.76

4.78 ± 0.25

95.6

5.13

4.84 ± 0.11

96.9

2.32

P&M-Xylene^a

4.01 ± 0.20

100.3

4.98

9.47 ± 0.17

94.7

1.78

9.87 ± 0.58

98.7

5.85

10.13 ± 0.66

101.3

6.75

Styrene

1.63 ± 0.03

81.5

1.94

4.36 ± 0.09

87.1

2.14

4.84 ± 0.12

96.9

2.45

4.88 ± 0.09

97.7

1.93

O-Xylene

2.01 ± 0.07

100.7

3.60

4.76 ± 0.17

95.1

3.49

4.77 ± 0.14

95.5

2.98

4.86 ± 0.05

97.2

1.53

Tribromomethane

1.89 ± 0.04

94.4

2.07

4.37 ± 0.24

87.3

5.41

4.64 ± 0.05

92.8

1.15

4.63 ± 0.13

92.6

2.70

1,1,2,2-Tetrachloroethane

1.71 ± 0.04

85.5

2.34

5.01 ± 0.17

100.2

3.33

4.82 ± 0.11

96.4

2.26

4.78 ± 0.08

95.6

1.65

Isopropylbenzene

1.96 ± 0.14

97.9

6.88

4.72 ± 0.11

94.4

2.32

4.77 ± 0.15

95.4

3.23

4.83 ± 0.13

96.6

2.59

N-Propylbenzene

2.01 ± 0.14

100.3

7.12

4.76 ± 0.12

95.2

2.41

4.72 ± 0.11

94.3

2.31

4.78 ± 0.11

95.7

2.37

1,3,5-Trimethylbenzene

1.99 ± 0.11

99.6

5.55

0.74 ± 0.11

94.7

2.28

5.20 ± 0.23

104.1

4.46

4.99 ± 0.18

99.8

3.57

1,2,4-Trimethylbenzene

2.04 ± 0.09

102.1

4.29

4.79 ± 0.21

95.8

4.39

5.17 ± 0.18

103.5

3.49

5.00 ± 0.17

100.1

3.40

1,3-Dichlorobenzene

2.02 ± 0.07

100.8

3.52

4.98 ± 0.10

99.6

2.05

4.83 ± 0.11

96.6

2.31

4.72 ± 0.16

94.4

3.44

1,4-Dichlorobenzene

2.02 ± 0.06

100.9

2.83

4.98 ± 0.16

99.7

3.15

4.79 ± 0.10

95.7

2.03

4.69 ± 0.16

93.9

3.41

1,2-Dichlorobenzene

1.99 ± 0.03

99.5

1.72

5.00 ± 0.14

100.0

2.86

4.70 ± 0.07

94.0

1.50

4.65 ± 0.14

93.1

2.93

1,3,5-Trichlorobenzene

2.05 ± 0.07

102.3

3.21

4.77 ± 0.17

95.4

3.63

4.77 ± 0.26

95.3

5.56

4.83 ± 0.36

96.6

7.52

1,2,4-Trichlorobenzene

2.02 ± 0.04

101.0

2.06

4.80 ± 0.26

96.0

5.38

4.63 ± 0.13

92.5

2.83

4.70 ± 0.12

94.0

2.64

Naphthalene

1.91 ±0.05

95.7

2.41

4.92 ± 0.36

98.5

7.40

4.73 ± 0.07

94.7

1.40

4.73 ± 0.12

94.7

2.46

Hexachloro-1,3-butadiene

2.01 ± 0.20

100.6

6.05

4.40 ± 0.22

88.1

4.91

4.92 ± 0.29

98.4

5.95

4.84 ± 0.13

96.8

2.69

1,2,3-Trichlorobenzene

2.07 ± 0.02

103.6

1.04

5.22 ± 0.36

104.4

6.93

4.89 ± 0.18

97.8

3.74

4.96 ± 0.09

99.3

1.77