Table 2 Passive sampling and LC-HRMS method and instrumental performance for the 15 selected analyte vapours.

Compound	t_r in min (%RSD) n = 6^a	Calculated ion (m/z)	δ (ppm)	Recovery ± SD (%) n = 6^b	Precision (height %RSD) n ≥ 6^a		Linearity (R) n ≥ 9^c		LOD n ≥ 9^c		Linear range: Passive Sampler + LC-HRMS (ng on sampler) n ≥ 9^d
Compound	t_r in min (%RSD) n = 6^a	Calculated ion (m/z)	δ (ppm)	Recovery ± SD (%) n = 6^b	LC-HRMS	Passive Sampling + LC-HRMS	LC-HRMS^c	Passive Sampler + LC-HRMS^d	LC-HRMS (pg on column)^c	Passive Sampler + LC-HRMS (ng dm⁻³)^d
HMTD	2.4 (0.7)	207.0976	−0.97	2 ± 1	7	30.4	0.999	n.d.	135	37000	n.d.
EGDN	2.9 (0.5)	61.9884	+1.61	93 ± 7	20	27.8	0.998	0.997	520	2000	2.5–50
HMDD	3.7 (0.7)	177.0870	−0.56	61 ± 35	24	64.9	0.993	0.998	270	370	0.5–100
3,4-DNT	4.8 (0.3)	182.0333	−0.55	79 ± 11	22	36.4	0.999	0.989	15	5	0.5–100
DMNB	4.6 (0.5)	194.1135	−0.52	50 ± 10	13	34.4	0.982	0.993	350	740	1–100
2,3-DNT	5.4 (0.7)	182.0333	−0.55	94 ± 7	23	42.4	0.995	0.989	715	7	0.5–50
NG	5.3 (0.5)	61.9884	+1.61	80 ± 15	23	19.2	0.999	0.999	20	18500	25–100
TNT	5.1 (0.4)	227.0184	−1.32	10 ± 7	25	46.5	0.994	0.979	25	10	2.5–50
2,6-DNT	5.8 (0.4)	182.0333	−0.55	91 ± 7	6	19.8	0.993	0.999	135	10	0.5–100
DADP	5.3 (0.5)	89.0597	−4.49	50 ± 10	26	14.9	0.999	0.999	10	370	0.5–100
2,4-DNT	6.0 (0.7)	181.0255	−0.55	79 ± 13	24	44.4	0.997	0.996	10	9	0.5–100
TATP	6.4 (0.5)	89.0597	−3.37	43 ± 5	5	27.2	0.998	0.982	105	89	0.5–100
2-NT	6.9 (0.7)	136.0404	0	72 ± 4	26	10.0	0.998	0.924	1090	3700	5–100
4-NT	7.2 (0.5)	136.0404	0	50 ± 10	27	10.7	0.999	0.995	255	1850	2.5–100
3-NT	—	137.0482	0	70 ± 13	22	n.d.	0.999	n.d.	82660	n.d.	n.d.

n.d. = not detected; ^an = 6 for 0.135 dm³ voids spiked with 5 µg explosives; samplers exposed for 120 h and samples injected in triplicate (n = 18); ^bn = 6 for 0.135 dm³ voids spiked with 5 µg explosives; samplers exposed for 72 h and samples injected in triplicate (n = 18); ^cn = 16 concentrations were prepared in duplicate (0.001–100 µg mL⁻¹) and injected in triplicate (n = 96); ^d0.135 dm³ voids spiked at five exposure levels i.e. 0.05–10 µg (n = 3 for each, n = 6 at 5 µg), samplers exposed for 120 h and samples injected in triplicate (n = 54).

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