TVOCs OSB Lab
TVOCs OSB Lab
An important parameter for interpretation is TVOCs and is found in various forms at the bottom of each run in the Report of Analysis:
a) TVOCs (Toluene) is the total ion chromatogram (TIC) area calculated by macro software with the response factor (RF) of Toluene or d8-Toluene. The relationship Tol/d8-Tol is 0.9193 or the reciprocal 1.0879 which is also used to convert previously established response factors.
b) TVOCs (Toluene) ≥ C10 is the total ion chromatogram (TIC) area eluting after Decane calculated manually with RF Toluene or d8-Toluene. It is a useful and reasonable estimate of the paraffin, isoparaffin and higher boiling substituted benzene concentration associated with naphthas, mineral spirits and odourless mineral spirits consisting of many poorly defined branched hydrocarbon isomers. Such petroleum hydrocarbons exhibit RFs within 30% of RF Tolulene.
c) TVOCs (Quantified) is the sum by macro software of concentrations in the Report of Analysis which are quantified using individual chemical Toluene response factors (TRFs). Chemical TRFs are established using standards and span a known concentration range. Sample concentrations in excess of the standard range need to be diluted since very elevated chemical concentrations result in saturated (truncated) ion peaks that cannot be quantified directly.
d) Molhave-Clausen TVOCs (Toluene) uses an approach recommended by these European researchers but somewhat broader in scope for the range of VOCs included. It is the sum by macro software of TVOCs (Quantified) plus TVOCs (Toluene) not included in the Report of Analysis and represents a more complete a more complete total volatile component (analogous to the sum Sid and Sum TVOC value).
Vol.3, No.8 1996 Indoor Air BULLETIN 11