. Author manuscript; available in PMC: 2015 Sep 4.

Published in final edited form as: Anal Methods. 2014 Feb 25;6(8):2592–2607. doi: 10.1039/C3AY42085J

Table 4.

Recoveries of OPA vapor following air draw through S10 LpDNPH samplers^a

Quantity of OPA vapor collected (µg)	Period of air draw through DNPH sampler @ 1.0 L min⁻¹ (min)	Average quantity of OPA found (µg)	Average recovery^b	RSD
0.86	240	0.731	0.850	0.060
1.16	15	1.21	1.039	0.0284
1.32	120	1.12	0.850	0.0319
1.25	369	0.785	0.628	0.157
6.49	15	6.53	1.003	0.0382
6.16	120	5.80	0.942	0.0322
6.24	363	4.18	0.670	0.364
19.2	15	16.1	0.836	0.179
18.0	120	15.9	0.881	0.0407
18.9	360	17.1	0.904	0.0830

Aliquots of acetonitrile solutions of OPA were deposited onto PTFE-GFFs, and pumps operated at 1.0 L min⁻¹ in a nitrogen atmosphere.

Each average recovery was based on four samples. Thus, Table 4 represents 40 samples.