AXIO | Proficiency Testing schemes 2026
Rounds per Year
Sample Code Matrix
Analytes
PT-AR-01
25mm cellulose ester filters (Workplace air)
Cadmium; Chromium; Cobalt; Copper; Iron; Manganese; Nickel; Lead; Zinc Cadmium; Chromium; Cobalt; Copper; Iron; Manganese; Nickel; Lead; Zinc Cadmium; Chromium; Cobalt; Copper; Iron; Manganese; Nickel; Lead; Zinc
4
PT-AR-01-A 37 mm Cellulose acetate (Workplace air)
2
PT-AR-01-B 37mm cellulose ester filters (Workplace air)
4
PT-AR-02 Quartz PVC filter 25mm diameter (Workplace air) Respirable grade quartz by XRD (by direct analysis of filters supplied) 2 PT-AR-02-FTIR Quartz PVC filter 25mm diameter (Workplace air) Respirable grade quartz by FTIR (by direct analysis of filters supplied) 2 PT-AR-02I Quartz PVC filter 25mm diameter (Workplace air) Respirable grade quartz by either XRD 2
or FTIR (by indirect analysis, i.e. by ashing and redeposition onto analytical filter or by KBr disc) Dust by gravimetry (mass of solids)
PT-AR-03
Dust on glass fibre filter 25mm diameter (Workplace air) Dust on glass fibre filter 37mm diameter (Workplace air) Charcoal filled glass sorbent tubes (Workplace air) Charcoal filled glass sorbent tubes (Workplace air) Tenax TA filled sorbent tubes (Ambient air) Glass fibre filter 25mm diameter (Workplace air) Spiked NaOH treated Millipore PVDF filters 25 mm Ø (Workplace air)
2
PT-AR-04
Dust by gravimetry (mass of solids)
2
PT-AR-05
Benzene; Toluene; Xylene; Ethyl benzene
4
PT-AR-06
1,1-Trichloroethane; n-Hexane; n-Butyl acetate; Tetrachloroethene; Trichloroethylene Benzene; Toluene; Xylene; Ethyl benzene
4
PT-AR-07 PT-AR-08 PT-AR-09
2 4 2
Formaldehyde; Acetaldehyde
Chromium (VI)
PT-AR-10A Powder (Workplace air)
Chromium; Cobalt; Copper; Iron; Manganese; Nickel; Zinc. One or more of the listed elements will be included in each round. 1
PT-AR-10B PT-AR-11 PT-AR-12
Dust (Workplace air)
Lead
1
Palmes-type diffusion tubes (Ambient air) Tenax TA filled sorbent tubes (Ambient air)
Nitrogen dioxide (as nitrite)
4 4 2 2 2
Benzene; Toluene; Xylene; Ethyl benzene Benzene; Toluene; Xylene; Ethyl benzene Antimony; Arsenic, Cadmium; Nickel; Lead
PT-AR-12A Carbopack X filled sorbent tubes (Ambient air)
PT-AR-13 PT-AR-14 PT-AR-16 PT-AR-17 PT-AR-18
Quartz fibre filter 47mm diameter (Ambient air)
Quartz fibre filter 47mm (Ambient air)
Phosphate
25 mm diameter quartz fibre filters (Workplace air) Elemental carbon
1
Quartz fibre filter 47mm diameter (Ambient air)
Dust by gravimetry (mass of solids)
2 2
Cellulose ester filters 37mm diameter (Workplace air)
Beryllium
PT-AR-21
Tenax TA filled sorbent tubes (Indoor/Chamber air)
Benzene; n-Hexane; Toluene; Butyl acetate; MIBK; p-Xylene; Diacetyl#; Phenol; 124-TMB; Limonene; 4-PCH; Dodecane; Styrene Qualitative determination of VOCs including alcohol, aliphatic, aromatic, ester, halocarbon and terpene compounds. See Appendix B in the AIR PT Scheme Description for compound listing for sample 22.
2
PT-AR-22
Tenax TA filled sorbent tubes (Indoor/Chamber air)
2
PT-AR-31
Potassium permanganate & sulfuric acid impinger solution (Stack emissions) Potassium dichromate & nitric acid impinger solution (Stack emissions) Metals impinger solution (Stack emissions)
Volume; Mercury
2
PT-AR-32
Volume; Mercury
2
PT-AR-33
Volume, Sb, Cd, Co, Mn; Volume, As, Cr, Cu, Pb, Ni, Tl; Volume, Sb, Cd, Co, Mn, Ni, Volume, As, Cr, Cu, Pb, Se
4
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