UMEx 300 Passive Sampler Cat. No. 500 Operating Instruction Form 40131 PDF
User Manual: 40131
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Operating Instructions 863 Valley View Road, Eighty Four, PA 15330 USA Tel: 724-941-9701 • www.skcinc.com 3 Passive Sampler for Ammonia Cat. No. 500-300 The SKC UMEx 300 Passive Sampler effectively collects ammonia at 39.92 ml/min. The UME x 300 Passive Sampler contains a tape treated with sulfuric acid. Each sampler incorporates a “blank/correction” section of tape in addition to the sample section of tape. Analysis is by ion chromatography (IC) with conductivity detection or visible absorption spectometry for identification of ammonia that may be present in the sample. Designed for single use, the SKC UMEx 300 Passive Sampler is packaged in an aluminized pouch for easy sample transport to a laboratory. Performance Profile Sampling Rate: 39.92 ml/min with a relative standard deviation of 11.4% Validated Concentration Range: 0.1 to 100 ppm Analysis Method: Solvent extraction and analysis of ammonium ion by IC with conductivity detection or visible absorption spectometry Lower Detection Limits: 15 min: 2.4 ppm 8 hrs: 0.075 ppm 24 hrs: 0.025 ppm Shelf-life: 9 mos from date of manufacture at ≤ 39.2 F (4 C) Storage: Before use: ≤ 39.2 F (4 C) After use: Ambient temperature (72 F [22 C]) or ≤ 39.2 F (4 C) and analyze within 3 weeks Accuracy: ± 23.4% Temperature Effects: No effect on sampling rate from 22 to 40 C Humidity Effects: No effect from 20 to 80% relative humidity (RH) Wind Velocity Effects: No effect from 5 to 100 cm/sec Interferences: None identified Dimensions: 3.4 x 1.1 x 0.35 in (8.6 x 2.8 x 0.89 cm) Weight: 0.38 oz (10.9 gm) Slide Cover: Pink Sampling Instructions Cautions: • Do not store with food. • Before sampling, check the expiration date on the label on the outside of the pouch. Do not use after the last day of the month indicated. • SKC recommends using gloves when handling chemically treated media. • UMEx samplers are designed for single use only. Do NOT reuse UMEx samplers. 1. Open the aluminized pouch and remove the sampler. Do not discard the pouch; use it to send sampler to the laboratory. Store the pouch away from potential ammonia sources. 2. Enter date, start time, and location in the space provided on the back of the sampler. 3. Position the sampler on a worker’s collar for personal sampling or in an appropriate location for area sampling. 4. Slide the sampler cover to the “on” position to begin sampling. 5. After sampling for the desired time, up to 24 hours, slide the sampler cover to the “off” position to stop sampling. Enter the sample stop time in the space provided on the back of the sampler. 6. Place the sampler in the original pouch immediately after sampling. 7. Seal the pouch. Send pertinent information and sample to an accredited laboratory for analysis. Analysis Instructions for Ammonia Calibration Standards – Ammonium Purchase commercially available ammonium standards appropriate for your application. Prepare a range of ammonium standards in de-ionized ultra-filtered (DIUF) water as outlined in Sample Preparation. Note: The ammonium curve is not linear. A graphing program will be needed to calculate results. Sample Preparation for Ammonia 1. Remove the sampler from the pouch and the sliding cover from the sampler. 2. Use clean forceps to lift out the treated tape from each section. Place each piece of tape in a sealed vial. This provides a sample and a blank/correction. Note: It is also acceptable to use a “lot” blank to correct for background. One lot blank is included in each box of badges. Note: The blank/correction section of tape has an indentation for easy identification. 3. Ammonium is desorbed from both the sample and the blank/correction tapes by adding 3 ml of DIUF water to each vial. Shake the sample by hand and then let stand for 60 minutes. Excessive shaking causes the filter to break apart in the vial. 4. Immediately transfer 1 ml of extract to an auto-sampler vial for analysis of ammonia. Ammonia Sample Analysis 1. The sample extracts are analyzed for the ammonium ion by ion chromatography with conductivity detection or visible absorption spectometry. 2. A 25-microliter portion of the extract is injected onto a Dionex 3 x 250-mm CS16 column and with a 36-mM methanesulfonic acid eluent. 3. Calculate the ammonium results by comparing against a standard calibration curve. 4. Convert the results from ammonium to ammonia using the following formula: Concentration μg/ml ammonia = Concentration μg/ml ammonium x 0.944 5. Total mass of ammonia is calculated below: Concentration ammonia (μg/ml) x Desorption volume (3 ml) 6. The ammonia from the blank/correction tape must always be subtracted from the sample tape when calculating air concentrations. 7. Calculate the air concentration in ppm using the following equations: Time (minutes) x Sampling rate (39.92 ml/min) 1000 Concentration (ppm) = Mass (mg) x 24450 Air volume (L) x Molecular weight (17.0 gm/mole) la ol C e iv ea ct R D iff us io n pl at e ta pe (s rc lip am pl e) Volume of air (liters) = Body Reactive tape (blank/correction) Sliding cover UMEx Passive Samplers# UMEx 300,*† for ammonia, pk/10 UMEx 100,*†‡ for formaldehyde and other aldehydes, pk/10 UMEx 200,*† for sulfur dioxide and/or nitrogen dioxide, pk/10 Accessory Treated Tape, for QC purposes only, pk/25 Stand for Area Sampling Cat. No. 500-300 500-100 500-200 P20083 690-302 * Limited shelf-life † Do not store with food. ‡ Storage in a freezer at ≤39.2 F (4 C) required # UMEx passive samplers are designed for single use only. Do NOT reuse UMEx samplers. SKC Limited Warranty and Return Policy SKC products are subject to the SKC Limited Warranty and Return Policy, which provides SKC’s sole liability and the buyer’s exclusive remedy. To view the complete SKC Limited Warranty and Return Policy, go to http://www.skcinc.com/warranty.asp. www.skcinc.com Form 40131 Rev 1705
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