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

Güzel, Barış; Canli, Oltan

doi:10.1186/s40543-020-00242-6

Journal of Analytical Science and Technology

Table 5 Measurement uncertainty study of investigated VOCs at 5 μg/L

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

Compounds	Measurement (μg/L)	Standard combined uncertainty (μg/L)	Expanded uncertainty (μg/L)a	Relative uncertainty (%)	Contributions (%) of the individual uncertainty sources
Compounds	Measurement (μg/L)	Standard combined uncertainty (μg/L)	Expanded uncertainty (μg/L)a	Relative uncertainty (%)	Standard preparation	Sample preparation	Calibration curve	Repeatability
Dichloromethane	4.7	0.14	0.29	5.77	0.87	5.16	58.71	35.26
1,1-Dichloroethane	4.6	0.21	0.41	8.30	0.65	3.85	68.27	27.43
Trichloromethane	4.7	0.18	0.35	7.04	0.86	5.11	81.79	12.25
1,2-Dichloroethane	4.7	0.16	0.33	6.57	0.87	5.17	75.94	18.02
Benzene	4.6	0.20	0.40	8.03	0.76	4.53	83.00	11.70
Trichloroethene	4.5	0.23	0.47	9.30	0.65	3.88	82.00	13.46
Bromodichloromethane	4.6	0.19	0.38	7.57	0.79	4.72	81.24	13.24
Toluene	4.7	0.18	0.35	7.08	0.84	4.96	79.58	14.62
Dibromochloromethane	4.6	0.21	0.42	8.42	0.67	3.96	73.79	21.58
Tetrachloroethene	4.5	0.25	0.51	10.10	0.57	3.38	75.96	20.09
Tetrachloromethane	4.6	0.18	0.37	7.31	0.83	4.91	81.69	12.57
1,1,1,2-Tetrachloroethane	4.7	0.18	0.35	7.06	0.84	5.01	80.21	13.93
Ethylbenzene	4.6	0.18	0.36	7.18	0.82	4.90	79.59	14.69
P&M-Xylene	9.3	0.35	0.70	6.97	0.84	4.96	77.91	16.29
Styrene	4.6	0.20	0.41	8.12	0.72	4.28	78.31	16.69
O-Xylene	4.7	0.14	0.27	5.43	1.04	6.21	75.45	17.30
Tribromomethane	4.6	0.19	0.37	7.45	0.70	4.16	64.14	31.00
1,1,2,2-Tetrachloroethane	4.6	0.18	0.36	7.18	0.78	4.62	73.12	21.49
Isopropylbenzene	4.6	0.18	0.37	7.30	0.78	4.61	74.87	19.75
N-Propylbenzene	4.6	0.18	0.36	7.30	0.77	4.59	74.29	20.35
1,3,5-Trimethylbenzene	4.7	0.15	0.31	6.18	0.90	5.32	72.60	21.18
1,2,4-Trimethylbenzene	4.8	0.12	0.23	4.65	1.13	6.71	67.23	24.93
1,3-Dichlorobenzene	4.7	0.14	0.29	5.75	0.98	5.83	74.95	18.24
1,4-Dichlorobenzene	4.7	0.13	0.27	5.32	1.03	6.09	71.30	21.58
1,2-Dichlorobenzene	4.8	0.13	0.25	5.10	1.04	6.19	68.17	24.60
1,3,5-Trichlorobenzene	4.7	0.13	0.27	5.39	0.96	5.68	63.80	29.57
1,2,4-Trichlorobenzene	4.8	0.09	0.17	3.49	1.36	8.07	50.47	40.10
Naphthalene	4.8	0.08	0.16	3.22	1.48	8.78	53.19	36.55
Hexachloro-1,3-butadiene	4.6	0.19	0.39	7.75	0.74	4.38	75.72	19.16
1,2,3-Trichlorobenzene	4.9	0.07	0.15	2.99	1.69	10.03	63.65	24.64

^ak = 2, 95% confidence level

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