UMEx 100 Operating Instructions
Contents
1. for the desired time up to 8 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 Place the sampler in the original pouch immediately after sampling Seal the pouch Send pertinent information and sample to an accredited labora tory for analysis Use expedited shipping wn NID Analysis Instructions Derivative Preparation Note Prepared derivative standards are commercially available 1 Add 10 ml concentrated hydrochloric acid to 2 grams of 2 4 dinitrophenylhydrazine under stirring The yellowish crystal mass is dissolved in 200 ml ethanol 95 Stir for 30 minutes then cap the flask Filter to remove undissolved hydrazine hydrochloride Add 0 8 ml 37 aqueous formaldehyde to form a yellowish precipitate Filter and wash the crystals with 5 ml cold ethanol and recrystallize twice by adding boiling ethanol 95 7 Prepare standard solutions in acetonitrile aT PWN Sample Preparation 1 Remove the sampler from the pouch and the sliding cover from the sampler Use forceps cleaned with acetonitrile to lift out the reactive tape from each section Place each ina sealed vial This provides a sample and a blank correction Note The blank correction section of tape has an indentation for easy identification 2 The formaldehyde 2 4 dinitrophenylhydrazone is desorbed from both the sample and blank cor rection tap2. min 1000 Concentration Total mass collected mg x 1000 mg m Total volume sampled PPM in air 24 45 30 03 x mg m Other conditions may be acceptable When calculating results from 7 day sampling use a sampling rate of 20 4 ml min UME Passive Samplers Catalog No UME 100 for formaldehyde and other aldehydes 500 100 UME 200 for sulfur dioxide and or nitrogen dioxide 500 200 UME 400 for amines 500 400 Accessory Treated Tape for QC purposes only P20084 Limited shelf life storage at lt 39 2 F 4 C required Do not store with food Designed for single use only Do NOT reuse UME samplers References Levin J O and Lindahl R Diffusive Air Sampling of Reactive Compounds A Review Analyst Vol 119 Jan 1994 pp 79 83 Levin J et al High performance Liquid Chromatographic Determination of Formalde hyde in Air in the Ppb and Ppm range Using Diffusive Sampling and Hydrazone Formation Sweden Environ Technology Letter 9 1988 pp 1423 1430 OSHA Method 1007 Formaldehyde Diffusive Samplers May 2005 Levin J O Lindahl R and Andersson K A Passive Sampler for Formaldehyde in Air Using 2 4 Dinitrophenylhydrazine coated Glass Fiber Filters Environmental Science and Technology Vol 20 No 12 1986 pp 1273 1276 Notice This operating instruction may not address all safety concerns if any associated with this product and its use The user is responsi
3. 35 in 8 6 x 2 8 x 89 cm 0 38 oz 10 9 gm Green Sampling periods between 24 hours and 7 days have not been evaluated If sampling in an atmosphere containing formalin see www skcinc com instructions 1795 pdf for field study information Sampling Instructions Cautions Store at lt 39 2 F 4 C before use e Do not store with food e SKC recommends using gloves when handling chemically treated media Before sampling check the expiration date on the pouch label Do not use after the last day of the month indicated e UME samplers are designed for single use only Do NOT reuse UME samplers 1 Open the pouch and remove the sampler Do not discard the pouch as it is used to send sampler to the laboratory Store the pouch away from potential formaldehyde sources Note Included in the pouch is a small length of tape similar to the tape inside the sampler This tape protects the background of the sampler should any formaldehyde in the atmosphere enter the pouch Leave the tape inside the pouch at all times and send along with the sample to the laboratory Enter date and location in the space provided on the back of the sampler Position the sampler on a worker s collar for personal sampling or in an ap propriate location for area sampling 4 Slide the sampler cover to the on position to begin sampling Enter the sample start time in the space provided on the back of the sampler 5 After sampling
4. Operating Instructions 863 Valley View Road Eighty Four PA 15330 USA Tel 724 941 9701 Fax 724 941 1369 e mail skctech skcinc com UME 100 Passive Sampler for Formaldehyde Catalog No 500 100 Developed in collaboration with the National Institute of Working Life in Umea Sweden and validated by OSHA the SKC UME 100 Formaldehyde Passive Sampler collects formalde hyde in the 5 ppb to 5 ppm range The UME 100 Passive Sampler contains a tape treated with 2 4 dinitrophenylhydrazine DNPH Each sampler incorporates a blank correction section of tape in addition to the sample section of tape Analysis is by high performance liquid chromatography HPLC foridentification of formaldehyde that may be present in the sample Designed for single use the SKC UME 100 Passive Sampler is packaged in an aluminized pouch for easy sample transport to a laboratory If sampling in an atmosphere containing formalin see www skcinc com instructions 1795 pdf for field study information Application Notes Because of the UME 100 Sampler s relatively high sampling rate and sensitive analysis it can be used for 15 minute STEL sampling in the ppm range personal monitoring up to 8 hours and 24 hour or 7 day static monitoring of contaminants found in indoor environments Note Sampling periods between 24 hours and 7 days have not been evaluated www skcinc com Performance Profile Sampling Rate for Formaldehyde Concentra
5. ble for determining and following the appropriate safety and health practices and regulatory limitations if any before using the product The information contained in this document should not be construed as legal advice opinion or as a final authority on legal or regulatory procedures Form 3760 Rev 1003
6. es by placing each in its own 4 ml glass vial containing 3 0 ml of acetonitrile and shaking them by hand for one minute Sample Analysis Resdivetaed 1 A10 ul portion of the solution resulting from blank correction Zaye Step 2 above is subjected to high performance liquid chromatographic HPLC determination using an octadecylsilane column and a mobile phase consisting of 33 water in methanol Sliding cover 2 The formaldehyde 2 4 dinitrophenylhydrazone is detected with UV absorp tion between 230 and 370 nanometers nm Tunable UV detectors should use 365 nm for optimum results Detection limit depends on instrument sensitivity 3 Quantitative analysis is performed using the synthesized formaldehyde hydrazone as an external standard and then converting results to reflect concentration in formaldehyde Use the following formula Concentration pg ml formaldehyde Concentration pg ml hydrazone x 30 03 210 21 Where molecular weight of formaldehyde is 30 03 Where molecular weight of formaldehyde 2 4 dinitrophenylhydrazone is 210 21 4 Formaldehyde content of the blank correction tape must always be subtract ed from the sample tape when calculating air concentrations 5 Calculate the results by comparing the standards against the samples Use the following formulas to calculate Total mass collected ug Concentration ug ml x Desorption Volume ml Volume of air liters Time minutes x Sampling rate 28 6 ml
7. tion Range Detection Principle Analysis Method Lower Detection Limits Shelf life Storage Capacity Accuracy Temperature Effects Humidity Effects Wind Velocity Effects Interferences Dimensions Weight Slide Cover 28 6 mi min with a relative standard deviation of 18 independent of variations in relative humidity and wind face velocities between 05 and 1 0 m s meters per sec for up to 8 hours or 24 hours 20 4 ml min average sampling rate for 7 day sampling See the Passive Sampling Guide at www skcinc com for UME 100 sampling rates for other aldehydes 5 ppb to 5 ppm Formation of stable DNPH hydrazone in the presence of formaldehyde Desorption of hydrazone and analysis by HPLC with UV detection 15 minutes 200 ppb 24 mg m 8 hours 5 ppb 006 mg m8 24 hours 2 ppb 002 mg m 7 days 0 2 ppb 0002 mg m 12 mos from date of manufacture at lt 39 2 F 4 C Before use lt 39 2 F 4 C After use lt 39 2 F 4 C and analyze within three weeks D Do not store with food 29 ug sample 25 exceeds OSHA requirements No effect on sampling rate between 10 and 30 C No effect from 10 to 80 relative humidity RH Do not use sampler below 10 RH No effect from 0 05 to 1 0 m s good correlation at 0 02 m s e Highly specific for formaldehyde Large amounts of carbonyl compounds may reduce the uptake of formaldehyde e Use in ozone levels less than 0 5 ppm 3 4 x 1 1 x
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