Wet Chemistry - Filters for Suspended Solids Brochure

Copyright Environmental Express, Inc., PSWCPROW12.08 E N V I R O N M E N T A L E X P R E S SCall 800.343.5319 or 843.881.6560 • www.environmentalexpress.comWet Chemistry: Filters for Suspended SolidsRobotically weighed ProWeigh® Filters for Total and Volatile Suspended Solids improve accuracy and decrease sample prep time in your laboratory. ProWeigh Filters from Environmental Express have been listed by name in Standard Methods 2540 since 1997. Laboratories have been using ProWeigh Filters since 1990 to reduce labor costs, improve accuracy and provide quicker reporting times. These robotically weighed filters from Environmental Express are a convenient and accurate way to perform Total and Volatile Suspended Solids. ProWeighs are ready-to-use filters for TSS and VSS that eliminate all hands-on filter preparation. All preparation steps including filter washing, drying, desiccating and weighing are already done for you. With ProWeighs, all you have to do is filter your sample, dry it and take the final weight.ProWeigh filters are Standard Methods approved.All ProWeigh filters are prepared according to Standard Methods requirements. These 1.5µm porosity, binderless borosilicate glass fiber filters are vacuum rinsed three times with 20mL aliquots of reagent-grade water to remove loose fibers, then dried at 105°C (or 550°C for Volatiles), cooled and desiccated.Filters are robotically weighed and ready to use.After preparation, ProWeigh filters are weighed robotically to the nearest 0.1mg. After weighing, each filter is transferred to an aluminum dish conveniently labeled with the final filter weight and a filter ID number. The dishes are stacked in sleeves of 25 and packaged in boxes of 100. Quality control ensures accuracy and filter integrity.Filters are weighed on electronic analytical balances that are calibrated hourly and routinely certified by a registered third party. Calibration is further verified by ASTM Class 1 weights. A copy of the balance certification is included in each box of ProWeigh filters.Filters are check-weighed prior to shipment for weight, accuracy and stability. Our quality control specifications demand a tighter tolerance than the ±0.5mg required by Standard Methods. Filters are visually inspected at the cutting, washing and drying steps to ensure the absence of holes or debris. Each pan is labeled with the final weight in barcode format.Each ProWeigh filter is supplied in an aluminum pan that has the weight of the filter and a filter ID number printed on it. This data is presented in print as well as in 128 barcode format. ProWeighs for Volatiles are heated to 550°C.ProWeigh filters are also available for performing fixed or volatile solids. After the vacuum rinsing and drying steps, these ProWeighs are heated to 550°C in a muffle furnace to drive off any volatile materials. Next, they are desiccated, weighed to 0.1mg and quality checked for accuracy. DoubleWeigh Filters are also available.DoubleWeighTM filters are robotically weighed twice to ensure accuracy. DoubleWeigh filters are 100% quality tested to double guarantee their weight stability. After weighing and labeling, filters are redried and reweighed to ensure a stable weight.Page 1Copyright Environmental Express, Inc., PSWCPROW12.08 E N V I R O N M E N T A L E X P R E S SCall 800.343.5319 or 843.881.6560 • www.environmentalexpress.comWet Chemistry: Filters for Suspended SolidsDescription Filter Size Catalog # ProWeigh 42mm F93442MM ProWeigh for Volatiles 42mm F93442VOL ProWeigh 47mm F93447MM DoubleWeigh 47mm F93447MM-X ProWeigh for Volatiles 47mm F93447VOL DoubleWeigh for Volatiles 47mm F93447VOLXProWeigh 55mm F93455MM ProWeigh for Volatiles 55mm F93455VOLProWeigh 70mm F93470MM ProWeigh for Volatiles 70mm F93470VOLProWeigh 76mm F93476MMDoubleWeigh 76mm F93476MM-XProWeigh for Volatiles 76mm F93476VOLProWeigh 90mm F93490MMDoubleWeigh 90mm F93490MM-XProWeigh for Volatiles 90mm F93490VOLProWeigh 110mm F934110MMProWeigh for Volatiles 110mm F934110VOLEach ProWeigh filter is washed under vacuum three times with 20mL aliquots of deionized water.Filter drying in horizontal flow mechanical ovens ensures uniform drying with no dead spots.Cooling in a desiccator provides moisture-free, stable filter weights. All ProWeigh filters are weighed on certified electronic analytical balances.Our customers are saying...For EPA testing, Proweigh filters are the best item in the market because they are always accurate, easy to use, and a great time saver.”Susan PizanaLab Environmental SupervisorFlint Hills Resources“ProWeigh filters save time and money. They are just one of the many high quality Environmental Express products I can always count on to improve productivity and my bottom line”Matthew Foti, Environmental Conservation Laboratories Inc., Laboratory Manager“We analyze over 500 samples each week for suspended solids. Having filters pre-washed and dried to a constant weight is the only way one analyst can process the samples without overtime. And when auditors ask about the filter preparation steps, I just show them the Environmental Express ProWeigh Certificate of Compliance.”Ray Fratti, QC Laboratories Inc., Wet Chemistry Laboratory DirectorStandard Methods Approved (Since 1997) For:Parameter EPA Standard Method MethodTotal Dissolved Solids 160.1 2540CTotal Suspended Solids 160.2 2540DVolatile Suspended Solids 160.4 2540EWith ProWeigh Filters all preparation steps are done for youPage 2