Headings ---------- Total and Volatile Suspended Solids Testing
Page Text ---------- 52 1-877-ICP-STDS info@delta-sci.com Wet Chemistry EPA Approved ProWeigh Filters For Improved Productivity and Accurate results Laboratories have been using ProWeigh Filters since 1990 to reduce labour costs, improve accuracy, and provide quicker reporting times. These pre-weighed filters 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. Standard Methods Approved All ProWeigh filters are prepared according to Standard Methods requirements. These 1.5m porosity borosilicate glass fiber filters are vacuum rinsed three times with 20mL aliquots of reagent-grade water to remove loose fibers, then dried at 105C (or 550C for Volatiles), cooled and desiccated for 24 hours. Filters are Pre-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 hundred count boxes. 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. Total and Volatile Suspended Solids Testing
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