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

Table 3

Statistical summary of volatile organic compounds found in used Tedlar bags (ppb unit).

(a) Polar compounds

Order	Compounds^a	Mean^b	SD^c	Min	Max	𝑁^d
1	AA	19.1	15.9	3.75	70.1	26
2	ATM	106	78.7	28.6	380	26
3	AAD	1.20	1.51	0.30	5.98	11
4	AT	85.9	52.1	0.21	241	24
5	AN	364	140	0.45	800	25
6	BT	108.4	313	0.13	1282	14
7	DC	46.2	18.8	15.0	86.5	26
8	EAC	1152	3359	0.10	14080	23
9	EA	1463	6979	19.7	35675	26
10	IA	47.7	119	0.20	621	25
11	MB	152.3	453	0.08	2217	11
12	MEK	1467	4769	0.14	22556	24
13	PT	164.1	481	0.08	2127	11
14	PH	88.0	74.0	0.06	334	25
15	THF	25.1	24.3	0.13	109	24

(b) Nonpolar compounds

Order	Compounds^a	Mean^b	SD^c	Min	Max	𝑁^d
1	B	4.76	10.6	0.07	48.0	18
2	COS	4.48	5.21	0.61	23.1	14
3	DO	3.80	4.70	0.16	14.7	14
4	EB	11.7	35.1	0.04	138	16
5	IB	6.74	8.16	0.16	27.4	14
6	MA	4.45	9.80	0.16	49.4	14
7	DD	11.2	14.0	0.02	45.1	19
8	OT	5.75	16.7	0.04	84.8	12
9	p-X	23.5	96.2	0.05	494	23
10	T	448	1328	0.06	5969	25

(c) Reference parameters

1	D/T ratio	323	503	44.8	2080
2	TVOC	21155	45356	1503	174092

^aAcronyms of the compounds used here can be found in Table 1.
^bFor the data measured below detection limit (DL), one half of DL was used to compute the mean.
^cStandard deviation.
^dNumber of values above detection limit (among 26 bags).