Proficiency testing (PT) is offered alternatively with and without own sampling. Participants may choose whether they wish to perform sampling for volatile organic compounds themselves, or to have the self-conditioned loaded sample carriers supplied to them.
The PT scheme consists of two runs with different concentrations of the same substances within the test gas. The test gas will contain up to ten different substances.
The concentrations to be measured will lie within the range between 10 to 200 µg/m³ for each substance. The concentration of benzene will lie close to the acceptance concentration of 0.2 mg/m³ (60 ppb) . Analysis has to be conducted by gas chromatography by means of thermal desorption according to DIN EN ISO 16017-1 , DIN EN ISO 16000-6  or IFA Folder No. 8936 .
For benzene you can use the method according to IFA-Folder No. 6265, measurement method No. 2 .
|Alkanes||n-decane, n-dodecane, n-heptane, n-hexadecane, n-hexane, n-nonane, n-octane, pentadecane, n-tetradecane, n-tridecane, n-undecane|
|Aromates||benzene, 3-carene, cumene, ethylbenzene, limonene, α-pinene, toluene, 1,2,3-trimethylbenzene, 1,2,4-trimethylbenzene, 1,3,5-trimethylbenzene, o-, m-, p-xylene|
|Esters and Ethers||n-butyl acetate, 2-butoxyethyl acetate, 2-(2-butoxy ethoxy)-ethyl acetate, 2-ethoxy ethylacetate|
|Ketones and aldehydes||butan-2-one, hexanal, acetophenone, 4-methyl-2-pentanone|
A large-scale dynamic test gas stream can be found at the IFA. It is suitable for parallel sampling by up to 13 participants.
Valid for both of the dates:
Participants will receive detailed information on the PT, a description of the apparatus and the connections for the sampling devices in particular, and a list of the substances to be analysed in good time.
The production of samples for volatile organic compounds is conducted at the dynamic test gas stream of the IFA. The particular feature of this PT scheme is that thermal desorption tubes are employed for loading which must be conditioned by the participants prior to the PT. Each participant (analysis laboratory) submits seven thermal desorption tubes to the IFA. The tubes and the blank value adjustments will be loaded with a sampling volume of 2 l. Only personal air samplers are used at the IFA. The sample carrier should not generate a back pressure exceeding 5.0 kPa under the specified conditions. Where internally fabricated sample carriers are used, please supply an adapter (GL14/GL25 threaded connection) for the test gas stream.
Each participant receives a sample kit comprising:
 Technical Rule for Hazardous Substances 910: Risk-related concept of measures for activities involving carcinogenic hazardous substances (TRGS 910). Version: February 2014. GMBl. (2014) No. 12, p. 258-270, last amended GMBl. (2014) No. 64, p. 1313
 DIN EN ISO 16017-1: Indoor, ambiant and workplace air - Sampling and analysis of volatile organic compounds by sorbent tube/thermal desorption/capillary gas chromatography - Part 1: Pumped sampling (10.01). Beuth, Berlin 2001
 DIN ISO 16000-6: Indoor air - Part 6: Determination of volatile organic compounds in indoor and test chamber air by active sampling on Tenax TA® sorbent, thermal desorption and gas chromatography using MS or MS-FID (ISO 16000-6:2011). Beuth, Berlin 2012
 VOC (Volatile Organic Compounds, Flüchtige Organische Substanzen) (Kennzahl 8936). In: IFA-Arbeitsmappe Messung von Gefahrstoffen. 45 Lfg. – X/2010. Ed.: Deutsche Gesetzliche Unfallversicherung (DGUV), Berlin. Erich Schmidt, Berlin 2011 – Loose-leaf edition
 Benzol, Messverfahren Nr. 2 (Kennzahl 6265). In: IFA-Arbeitsmappe Messung von Gefahrstoffen. Lfg. 2 – X/2013.
Division 2: Chemical and biological hazards