Our Whatman glass microfiber filter papers in grade 934-AH RTU have been pre-washed, dried (or ignited), cooled, desiccated and weighed, which eliminates the pre-treating steps that are otherwise required by the US EPA Laboratory Standard Method 2540 parts C, D, and E. These glass microfiber filter papers have fine particle retention of 1.5 µm at high flow rates to process heavy, turbid samples.

Our Whatman filter papers 934-AH family of products come in three different varieties:

  • 934-AH RTU for Suspended and Dissolved Solids—pre-washed, dried, cooled, and weighed filters with certified mass loss between washing and drying steps of the lesser of less than 0.5 mg or 4% in accordance with US EPA Lab Standard Method 2540 parts C and D. (Most filters come weighed to four decimal places, however a version of the 47 mm glass microfiber filter can be measured to five decimal places if needed.)
  • Ready-to-use for Volatiles—pre-washed, pre-weighed and pre-fired at 550°C aligned to US EPA Laboratory Standard Method 2540 parts C, D, and E.
  • RTU Double Weigh—drying, cooling and filter paper weighing steps repeated twice for customers with the highest regulatory concern.
  • Economy versions of 934-AH RTU dissolved, suspended, and volatiles testing filters are also available. These filter papers are pre-washed and dried but not weighed and do not come with barcodes.

Watch our 934-AH RTU Whatman filter paper demonstration to learn more.

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Product Product Name Price
9927-047 934-AH RTU for solids, double weigh, 47mm, 100/PK 47 mm 9927-047 187.67 USD Add to cart

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9927-070 934-AH RTU for solids, double weigh, 70mm, 100/ pk 70 mm 9927-070 227.00 USD Add to cart

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9927-090 934-AH RTU for solids, double weigh, 90mm, 100/PK 90 mm 9927-090 244.00 USD Add to cart

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2827-047 934-AH, pre-rinsed and dried, 47mm, 100/pk 47 mm 2827-047 93.81 USD Add to cart

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9907-047 Grade 934-AH RTU Filter for Total Suspended Solids Analysis, 47 mm (100 pcs) 47 mm 9907-047 115.51 USD Add to cart

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9907-055 Grade 934-AH RTU Filter for Total Suspended Solids Analysis, 55 mm (100 pcs) 55 mm 9907-055 127.73 USD Add to cart

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9907-042 Grade 934-AH RTU Filter for Total Suspended Solids Analysis, 42.5 mm (100 pcs) 42.5 mm 9907-042 138.60 USD Add to cart

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9907-090 Grade 934-AH RTU Filter for Total Suspended Solids Analysis, 90 mm (100 pcs) 90 mm 9907-090 179.37 USD Add to cart

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9907-9436 Grade 934-AH RTU Filter for Total Suspended Solids Analysis, 5 decimal places, 47 mm (100 pcs) 47 mm 9907-9436 169.95 USD Add to cart

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4827-070 934-AH for volatile, pre-rinsed and ignited, 70mm, 100/pk 70 mm 4827-070 153.19 USD Add to cart

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9907-070 934-AH RTU for solids, 70mm, 100/pk 70 mm 9907-070 161.11 USD Add to cart

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3827-047 934-AH RTU for volatile, pre-weighed, 47mm, 100/pk 47 mm 3827-047 127.16 USD Add to cart

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3827-035 934-AH RTU for volatile, pre-weighed, 35mm, 100/pk 35 mm 3827-035 112.97 USD Add to cart

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3827-042 934-AH RTU for volatile, pre-weighed, 42.5mm, 100/pk 42 mm 3827-042 112.97 USD Add to cart

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4827-090 934-AH for volatile, pre-rinsed and ignited, 90mm, 100/pk 90 mm 4827-090 168.51 USD Add to cart

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3827-070 934-AH RTU for volatile, pre-weighed, 70mm, 100/pk 70 mm 3827-070 162.77 USD Add to cart

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4827-035 934-AH for volatile, pre-rinsed and ignited, 35mm, 100/pk 35 mm 4827-035 91.89 USD Add to cart

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3827-090 934-AH RTU for volatile, pre-weighed, 90mm, 100/pk 90 mm 3827-090 189.57 USD Add to cart

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4827-042 934-AH for volatile, pre-rinsed and ignited, 42.5mm, 100/pk 42 mm 4827-042 95.74 USD Add to cart

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4827-047 934-AH for volatile, pre-rinsed and ignited, 47mm, 100/pk 47 mm 4827-047 117.46 USD Add to cart

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