An investigation into the performance of a multi-sorbent sampling tube for the measurement of VVOC and VOC emissions from products used indoors

Transcription

1 An investigation into the performance of a multi-sorbent sampling tube for the measurement of VVOC and VOC emissions from products used indoors Veronica M. Brown and Derrick R. Crump Supplementary information Fig. S1 Picture of µ-cte set up to undertake duplicate sampling Fig. S2 Picture of foam sealant sample being tested under FLEC

2 Fig. S3 Picture of foam sealant sample in µ-cte Fig. S4 Picture of experimental set up for Nalophan bag tests

3 Fig. S5 Approximate concentrations of two C 4 hydrocarbons and two siloxanes released from foam sealant placed under FLEC (all compounds quantified as toluene and values above 5,000 µg m -3 set at this value) Fig. S6 Breakthrough of a further four VVOCs using two sorbent tubes connected in series sampling from an atmosphere of these compounds contained within a Nalophan bag

4 Table S1 Concentrations of VVOCs/VOCs in the emissions from samples of PU foam trapped onto two sorbent types (µg m -3 ) and details of statistical tests (a) Dominant compounds Compound n-pentane MCB Butyl acetate m/p-xylene Styrene o-xylene 2-Ethoxyethylacetate Benzaldehyde Sorbent Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Mean ,735 2, ,470 3, SD ,690 1, Max ,662 3, ,890 6, Min ,289 1, ,030 2, n P < t NS or S S S NS NS NS NS NS NS (b) Compounds detected in smaller amounts Compound MiBK Toluene Ethylbenzene 1-methoxy-2- Benzene- Epoxyethylbenzene Unidentified propylacetate acetaldehyde ester Benzoic acid Sorbent Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Mean SD Max Min n P t NS or S NS NS NS S NS NS NS NS Unidentified or only tentatively identified from NIST library, no pure standard available to confirm identity, quantified using response factor for toluene; Tenax = Tenax TA; Q/T/C = quartz wool/tenax TA/Carbograph 5TD; NS = not significantly different at the P = 0.05 probability level, S = significantly different at the P = 0.05 probability level

5 Table S2 Concentrations of VVOCs/VOCs in the emissions from samples of foam sealant trapped onto two sorbent types (µg m -3 ) and details of statistical tests Compound (a) Dominant compounds, sample volume litres Dimethyl ether Isobutane n-butane Isopentane RT 10.6 min Siloxane RT 23.9 min, RT 32.8 min, OMCTS DMCPS Siloxane Siloxane Sorbent Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Mean ,120 3, , SD ,980 1,720 1,030 2, ,190 1, Max 2,140 1,630 7,230 7,580 3,450 7, ,060 1,030 1,120 1,150 3,850 3, ,300 1,300 Min , n P t NS or S NS S S NS NS NS NS NS NS (b) Compounds detected in smaller amounts, sample volume litres Compound Propan-2-ol n-hexane Methylcyclopentane RT 38.1 min RT 39.9 min RT 41.3 min Siloxane Siloxane Siloxane n-tetradecane Sorbent Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Mean SD Max Min n P t NS or S NS NS NS NS NS NS NS NS NS Unidentified or only tentatively identified from NIST library, no pure standard available to confirm identity, quantified using response factor for toluene; RT = retention time; OMCTS = Octamethylcyclotetrasiloxane; DMCPS = Decamethylcyclopentasiloxane

6 (c) Compounds showing some effect of sorbent, sample volume litres Compound Isopentane Propan-2-ol n-hexane Methylcyclopentane Sorbent Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Tenax Q/T/C Mean SD Max Min n P t NS or S NS S NS NS