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Features & Details
| 🔥 ASHLESS <0.007% RESIDUE | Refined alpha cellulose treated with acid wash leaves less than 0.007% ash upon total ignition. |
| ⚖️ GRAVIMETRIC PRECISION | Standard filter paper for gravimetric quantitative chemical analysis and environmental assays. |
| ⏱️ FAST / MED / SLOW SPEEDS | Available in Fast (coarse particles), Medium (general precipitates), and Slow (fine barium sulfate). |
| 📏 7CM TO 18CM CIRCLES | Cleanly die-cut round discs seat flat inside analytical funnels without edge bypass leakage. |
About this item
Solid-Liquid Gravimetric Clarification & Analysis
Quantitative Filter Paper, Ashless Lab Circles , Fast/Medium/Slow Speed Professional Series
Ensuring dependable accuracy during daily operations requires professional equipment engineered to withstand demanding laboratory and industrial environments. The Xin Tester Quantitative Filter Paper, Ashless Lab Circles (7cm-18cm), Fast/Medium/Slow Speed (100 Pcs) provides verified stability, user-friendly operation, and certified safety compliance across standard maintenance protocols. Discover our complete line of diagnostic and testing instruments in the Lab Consumables catalog.
High Wet-Tensile Strength
Treated to resist pressure tearing during suction or gravity filtration, ensuring that filter cakes remain intact without fiber shedding.
Uniform Pore Matrix
Homogeneous fiber intertwining guarantees steady flow rates while cleanly trapping coarse or gelatinous precipitates.
💡
Filtration Insight: Membrane Selection & Pore Integrity
Selecting the proper polymer membrane prevents dissolution and extractable contamination. 0.22μm grades provide biological sterility, while 0.45μm grades clarify solutions and culture buffers efficiently under negative pressure.
Ordering & Model Verification
Ensure pore size, membrane diameter, and chemical compatibility match your fluid before ordering in the right-side checkout panel.
Related technical collections:
Lab Consumables |
Lab Glassware
FAQs
What is the main difference between quantitative and qualitative filter paper?
Quantitative filter paper is acid-washed to remove impurities. Specifically, this results in an extremely low ash content after ignition (ashless grade). Therefore, it is used for precise numerical measurements (gravimetric analysis). Qualitative paper is intended for general clarification and identification where the remaining ash weight is not critical.
How do I choose the correct filtration speed for my sample?
It depends on the size of your precipitate. Specifically, use Fast Speed for coarse or gelatinous precipitates like ferric hydroxide. Use Medium Speed for standard analytical work. For the finest precipitates, such as barium sulfate, always select Slow Speed to ensure maximum retention and zero sample loss.
Why might I see a slight yellowing or smoke during high-heat drying?
This is rare but can occur if the paper is exposed to extreme temperatures above 120°C for long periods. Specifically, natural cellulose may begin to oxidize. However, for standard quantitative protocols where the paper is ignited in a muffle furnace, this does not affect the final ash weight results.
What is the best way to store these filter circles?
To maintain the “Ashless” integrity, always keep the box closed when not in use. Specifically, store the quantitative filter paper in a cool, dry, and dust-free environment. Avoid exposure to acid or alkali vapors in the lab, as the high-purity cellulose can absorb airborne contaminants over time.
Xin Tester Quantitative Filter Paper, Ashless Lab Circles (7cm-18cm), Fast/Medium/Slow Speed (100 Pcs)
Price range: $8.53 through $21.33
6–12 Month Warranty
Repair & Refund support available for most products.
Free Worldwide Shipping
Ships within 3 business days.
Taxes & Duties
Buyer responsible for local import fees.
24/7 After-Sales Support
Technical assistance & video guidance within 24h.
Xin Tester Quantitative Filter Paper, Ashless Lab Circles (7cm-18cm), Fast/Medium/Slow Speed (100 Pcs)
Sale!
Price range: $8.53 through $21.33
Features & Details
| 🔥 ASHLESS <0.007% RESIDUE | Refined alpha cellulose treated with acid wash leaves less than 0.007% ash upon total ignition. |
| ⚖️ GRAVIMETRIC PRECISION | Standard filter paper for gravimetric quantitative chemical analysis and environmental assays. |
| ⏱️ FAST / MED / SLOW SPEEDS | Available in Fast (coarse particles), Medium (general precipitates), and Slow (fine barium sulfate). |
| 📏 7CM TO 18CM CIRCLES | Cleanly die-cut round discs seat flat inside analytical funnels without edge bypass leakage. |
Solid-Liquid Gravimetric Clarification & Analysis
Quantitative Filter Paper, Ashless Lab Circles , Fast/Medium/Slow Speed Professional Series
Ensuring dependable accuracy during daily operations requires professional equipment engineered to withstand demanding laboratory and industrial environments. The Xin Tester Quantitative Filter Paper, Ashless Lab Circles (7cm-18cm), Fast/Medium/Slow Speed (100 Pcs) provides verified stability, user-friendly operation, and certified safety compliance across standard maintenance protocols. Discover our complete line of diagnostic and testing instruments in the Lab Consumables catalog.
High Wet-Tensile Strength
Treated to resist pressure tearing during suction or gravity filtration, ensuring that filter cakes remain intact without fiber shedding.
Uniform Pore Matrix
Homogeneous fiber intertwining guarantees steady flow rates while cleanly trapping coarse or gelatinous precipitates.
💡
Filtration Insight: Membrane Selection & Pore Integrity
Selecting the proper polymer membrane prevents dissolution and extractable contamination. 0.22μm grades provide biological sterility, while 0.45μm grades clarify solutions and culture buffers efficiently under negative pressure.
Ordering & Model Verification
Ensure pore size, membrane diameter, and chemical compatibility match your fluid before ordering in the right-side checkout panel.
Related technical collections: Lab Consumables | Lab Glassware
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