Description
TSS Filter Paper in 934-AH, TSS and A/E Grades of Binder-Free Glass Microfiber
Product Overview
A TSS result is the difference between two weights on one filter, so the filter has to add nothing and lose nothing. These glass fiber filters are the TSS filter paper for that job. They are binder-free borosilicate discs, cut as Buchner filter paper for 55 mm and 70 mm funnels. Wastewater and environmental labs run them for Standard Methods 2540.
What the Filter Does
- Adds nothing to the sample. A binder-free borosilicate glass microfiber filter has no glue or organic binder to dissolve into the filtrate or shift the starting weight.
- Holds a stable weight through drying at 103 to 105 °C. The 934-AH filter and the A/E grade also hold through 550 °C ignition for fixed and volatile solids.
- Passes the sample without clogging. Fast flow with 1.5 µm retention (1.0 µm for A/E) keeps a turbid wastewater sample moving under vacuum, and a filter that clogs reads high.
- Fits the funnel in 55 mm and 70 mm, matching the holder on the lab's manifold. A pack of 100 covers routine batches with their blanks and duplicates.
Grade and Size Selection
Six variants of TSS filter paper, graded for the Standard Methods 2540 solids tests: C for dissolved solids, D for suspended solids, E for fixed and volatile solids. Pick the grade based on whether the filter will also be ignited for the E test.
| Option | Retention | Heat rating | Methods |
|---|---|---|---|
| 55 mm x 1.5 µm, 934-AH >500°C | 1.5 µm | Over 500 °C | 2540 C, D and E |
| 70 mm x 1.5 µm, 934-AH >500°C | 1.5 µm | Over 500 °C | 2540 C, D and E |
| 55 mm x 1.5 µm, 934-AH <500°C | 1.5 µm | Below 500 °C | 2540 C and D |
| 70 mm x 1.5 µm, 934-AH <500°C | 1.5 µm | Below 500 °C | 2540 C and D |
| 55 mm x 1.0 µm, A/E | 1.0 µm | 550 °C in air | 2540 C, D and E |
| 70 mm x 1.0 µm, A/E | 1.0 µm | 550 °C in air | 2540 C, D and E |
Specifications
| Specification | Value |
|---|---|
| Product type | Filter discs sold as TSS filter paper for suspended solids testing |
| Material | Binder-free borosilicate glass microfiber |
| Pack size | 100 filters |
| Diameters | 55 mm and 70 mm |
| Grades | 934-AH, TSS and A/E (retention, heat rating and methods in the selection table) |
| Maker | Hach |
Buy Glass Fiber Filters for TSS Online from Cleanflow
Order glass fiber filters in the grade your method calls for, plus the rest of your water testing equipment, from Cleanflow Utility Supply Company. Orders ship from Canada to addresses across Canada and the USA, with free shipping on orders over $199.
Returns and exchanges are accepted within 30 days under the Cleanflow refund policy. Email info@cleanflow.ca to confirm stock and lead time before ordering TSS filter paper in quantity.
Frequently Asked Questions
What is total suspended solids?
Total suspended solids is the dry weight of material caught on a glass fiber filter from a measured sample, reported in mg/L. Standard Methods 2540 D sets the procedure: filter, dry at 103 to 105 °C, weigh. Total suspended solids filter paper has to be binder-free for a valid weight.
What filter is used for a TSS test?
A binder-free glass fiber filter. Standard Methods 2540 D procedures name 934-AH and A/E type disks or equivalent, and both types are in the selection table. Pick 934-AH or A/E when the same filter goes on to volatile solids.
What glass fiber filter pore size is right for TSS?
1.5 µm nominal retention, the 934-AH grade rating, covers TSS work. 1.0 µm A/E is the finer alternative. Hach rates these filters by particle retention, the size the depth of fibers holds back. The figure is a retention rating, not a pore size.
What is the difference between 934-AH and TSS grade filters?
Heat rating. A 934-AH filter holds its weight through ignition at 550 °C, so one filter carries a sample from TSS into fixed and volatile solids. The TSS grade is rated below 500 °C and covers 2540 °C. Both are 1.5 µm glass microfiber filters.
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