AIR. Ambient, Indoor, Workplace Air and Stack Emissions Proficiency Testing Scheme Version 1 Issue Date 18/09/2018

Transcription

1 General Instructions Sample Storage All samples should be stored in accordance with the instructions provided on the sample labels from the time of arrival at your laboratory. If a preservative is routinely added to the type of sample provided, as part of your laboratory procedures, a suitable aliquot should be preserved as soon as possible in the normal way. Any dilutions that result from addition of preservatives should be corrected for before submission of results. All samples should be stored, prior to analysis, in the format provided to minimise potential from contamination. VOC samples on sorbent tubes should be stored away from other potential sources of solvent in the laboratory. Sample Preparation All samples should be equilibrated at room temperature 20(±5) º C before any analyses are performed. Samples should be prepared in accordance with the specific instructions for the group. These procedures should be followed exactly to ensure comparability of results Sample Analysis Samples should be analysed by the normal method or methods used by your laboratory. Replicate determinations can be made if this is normal laboratory procedure, although only one value per method can be submitted to for statistical analysis and reporting on laboratory performance. All samples should be treated like any other samples and all normal quality control procedures should be adopted. Results should be corrected for recovery and blank, if appropriate, and if this is the normal practice in the laboratory. If the sample is diluted as part of the analytical process, such dilutions should be corrected for. customerservices@lgcgroup.com Website: Page 1 of 7

2 Workplace Air Samples Sample 1 4 x 25 mm diameter mixed cellulose ester filter spiked with metal solutions plus 2 x blank filters. Cobalt Copper Iron Zinc Sample 1A-D Metals Sample 1E Blanks Sample 1A 4 x 37 mm diameter cellulose acetate cassette capsule spiked with metal solutions plus 2 x blank capsules Cobalt Copper Iron Zinc Sample 1A A-D Metals Sample 1A E Blanks Sample 2 Quartz (by FTIR or XRD) 4 x 25 mm diameter PVC filters (GLA5000) loaded with aerosolised quartz by employing the BCIRA respirable sampler (Higgins-Dewell design). One blank filter supplied for participants using XRD technique, up to four blank filters for participants using FTIR technique. Respirable grade quartz Sample 2A-D Quartz Sample 2E-F Blanks customerservices@lgcgroup.com Website: Page 2 of 7

3 Sample 5 4 x charcoal filled glass sorbent tubes dynamically loaded from the gas phase (prepared in accordance with procedures set out in ISO 6145 part 4) for analysis by solvent desorption plus 4 x blank sorbent tubes. Two of these blank sorbent tubes are unopened to be used if required by participant for internal spike recovery tests Benzene Toluene Xylene (all isomers) Ethyl benzene Sample 5A-D Metals Sample 5E Blanks Sample 5F Blanks (unopened) Sample 6 Material Supplied 4 x charcoal filled glass sorbent tubes dynamically loaded from the gas phase (prepared in accordance with procedures set out in ISO 6145 part 4) for analysis by solvent desorption plus 4 x blank sorbent tubes. Two of these blank sorbent tubes are unopened to be used if required by participant for internal spike recovery tests. 1,1,1-trichloroethane n-hexane n-butyl acetate Trichloroethylene Tetrachloroethene Sample 6A-D Metals Sample 6E Blanks Sample 6F Blanks (unopened) Sample 7 Material Supplied 4 x Tenax TA filled sorbent tubes (Perkin Elmer type-6.4mm OD, 5 mm ID and 90 mm long) dynamically loaded from the gas phase (prepared in accordance with procedures set out in ISO 6145 part 4) for analysis by thermal desorption plus 2 x blank sorbent tubes. Benzene Toluene Xylene (all isomers) Ethyl benzene Sample 7A-D VOCs Sample 7E-F Blank N.B: Participants are reminded to take extra care when handling the tubes to avoid returning damaged tubes. customerservices@lgcgroup.com Website: Page 3 of 7

4 Sample 8 4 x 25 mm diameter glass fibre filters (GFA) spiked with formaldehyde and acetaldehyde, 2,4,DNPH derivatives plus 3 x DNPH only treated blanks. Formaldehyde Acetaldehyde Sample 8A-D Aldehydes Sample 8E Blanks N.B: Participants will receive the filter in an amber glass vial. Sample 10A 1 x powder sample of fume derived from a mild steel welding. Iron Zinc Sample 10A Metals in dust A nominal 100 mg sample has been supplied which should be dried overnight at a nominal 95 C prior to digestion. The recommended amount of sample to be used is 10 (± 1.0) mg weighed to the nearest 0.1 mg. A small glass weighing boat is recommended for handling such materials which can be prone to static effects. Once weighed the sample can be rinsed through the tubular stem of the weighing boat into the receiving digestion vessel using aliquots of an acid used in the digestion method e.g. nitric acid. Sample 15 4 x 25 mm diameter glass fibre filters (GFA) spiked with lactose plus 2 x blank filters Lactose Sample 15A-D Lactose Sample 15E Blanks customerservices@lgcgroup.com Website: Page 4 of 7

5 Ambient Air Samples Sample 11 4 x Palmes-type diffusion tubes spiked with sodium nitrite as a surrogate for Nitrogen dioxide (NO 2 ) NO 2 as nitrite Sample 11A-D Nitrogen Dioxide Sample 12 4 x Tenax TA filled sorbent tubes (Perkin Elmer type - 6.4mm OD, 5 mm ID and 90 mm long) dynamically loaded from the gas phase (prepared in accordance with procedures set out in ISO 6145 part 4) for analysis by thermal desorption plus 2 x blank sorbent tubes Benzene Toluene Xylene (all isomers) Ethyl benzene Sample 12A-D VOCs Sample 12E-F Blank N.B: Participants are reminded to take extra care when handling the tubes to avoid returning damaged tubes. Sample 13 4 x 47 mm diameter quartz fibre filters spiked with metal solutions plus 2 x blank filters. Arsenic Sample 13A-D Metals Sample 13E Blanks customerservices@lgcgroup.com Website: Page 5 of 7

6 STACK EMISSION Samples Sample 31 1 x mL sample of 2.2% m/m potassium permanganate/6% m/m sulphuric acid impinger solution (prepared in accordance with BS EN 13211) containing mercury. Mercury Sample 31 Mercury Sample 33 1 x mL 3.3% nitric acid impinger solution (prepared in accordance with BS EN 14385) containing heavy metals. Arsenic Copper Vanadium Sample 33 Metals Sample 34 1 x mL 0.3% hydrogen peroxide impinger solution (prepared in accordance with BS EN 14791) containing sulfur dioxide (to be determined as sulfate). Sulfur dioxide (determined as sulfate) Sample 34 Sulfur dioxide customerservices@lgcgroup.com Website: Page 6 of 7

7 Sample 35 1 x mL 0.1M sodium hydroxide impinger solution (prepared in accordance with BS EN 15713) containing fluoride. Hydrogen fluoride Sample 35 Hydrogen fluoride Sample 38 1 x quartz filter (prepared in accordance with BS EN 14385) containing heavy metals plus 1 x blank filter Antimony Cobalt Thallium Sample 38 Metals, filter Sample 38 Blank Analyse the sample by your routine technique. Information on applicable methods is available in BS EN Sample 39 Material Supplied 1 x 250mL rinsing solution containing dissolved and suspended solids (prepared in accordance with EN ) Total Solids Sample 39 Rinsing Solution Rinse the entire contents of the sample container into a suitable dried and pre-weighed container. Evaporate in an oven at 120 o C at ambient pressure. After evaporation, place the weighing containers in the drying oven for at least 1 hour at 160 o C. Cool to ambient temperature and calculate the total solids content in the sample (reporting in mg) customerservices@lgcgroup.com Website: Page 7 of 7