Some Insights into Analytical Bias Involved in the Application of Grab Sampling for Volatile Organic Compounds: A Case Study against Used Tedlar Bags

Table 4

Correlation analysis between individual components and the reference parameters (D/T and TVOC).

(a) Polar compounds

		AA	ATM	AAD	AT	AN	BT	DC	EAC	EA	IA	MB	MEK	PT	PH	THF
D/T	𝑟	−0.12	−0.16	−0.08	−0.01	−8.93𝐸−05	0.1	−3.02𝐸−03	−0.05	−0.06	−0.12	−0.05	−0.02	0.07	−0.16	−0.05
	𝑃	0.56	0.45	0.68	0.96	1	0.62	0.99	0.82	0.76	0.58	0.82	0.92	0.75	0.45	0.79
TVOC	𝑟	0.41	0.63	−0.25	−0.08	−0.01	−0.05	−0.04	0.97	0.51	0.52	−0.06	0.93	−0.04	0.56	−0.24
	𝑃	0.04*	6.02𝐸−04 **	0.22	0.69	0.95	0.83	0.85	1.15𝐸−15 **	0.01	0.01	0.78	9.62𝐸−12 **	0.84	2.86𝐸−03	0.24

(b) Nonpolar compounds

		D/T	TVOC	B	COS	DO	EB	IB	MA	DD	OT	pX	T
D/T	𝑟	1	−0.06	−0.07	0.13	0.18	−0.13	−0.16	−0.07	−0.10	−0.09	−0.10	−0.09
	𝑃		0.76	0.72	0.51	0.37	0.51	0.43	0.72	0.63	0.65	0.63	0.68
TVOC	𝑟	−0.06	1	−0.16	0.51	0.12	−0.10	−0.18	−0.17	0.09	0.09	−0.05	0.79
	𝑃	0.76		0.43	0.01**	0.56	0.63	0.39	0.40	0.65	0.65	0.82	1.43𝐸−06 **

*Probability of no correlation less than 0.05.
**Probability of no correlation less than 0.01.