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Table 3 Intra and inter-day precision results of VOCs

From: Method validation and measurement uncertainty of possible thirty volatile organic compounds (VOCs) presented in the polyethylene present in bottled drinking waters sold in Turkey

Compound Intra-day (repeatability) Inter-day (reproducibility)
2 μg/L (n = 6) 5 μg/L (n = 6) Day 1 (5 μg/L (n = 6)) Day 2 (5 μg/L (n = 6))
Measured (μg/L) Recovery (%) RSD (%) Measured (μg/L) Recovery (%) RSD (%) Measured (μg/L) Recovery (%) RSD (%) Measured (μg/L) Recovery (%) RSD (%)
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-Xylenea 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
  1. aMeasurement of p&m-xylene was performed for 4 μg/L and 10 μg/L VOC solutions