--- product_id: 28253875 title: "1001-042 Quantitative Filter Paper Circles, 11 Micron, 10.5 s/100mL/sq inch Flow Rate, Grade 1, 42.5mm Diameter (Pack of 100)" brand: "whatman" price: "160 zł" currency: PLN in_stock: true reviews_count: 10 category: "Whatman" url: https://www.desertcart.pl/products/28253875-1001-042-quantitative-filter-paper-circles-11-micron-10-5 store_origin: PL region: Poland --- # 10.5 s/100mL/sq inch flow rate 42.5mm diameter precision 11 micron medium retention 1001-042 Quantitative Filter Paper Circles, 11 Micron, 10.5 s/100mL/sq inch Flow Rate, Grade 1, 42.5mm Diameter (Pack of 100) **Brand:** whatman **Price:** 160 zł **Availability:** ✅ In Stock ## Summary > 🔬 Elevate your lab game with precision you can trust! ## Quick Answers - **What is this?** 1001-042 Quantitative Filter Paper Circles, 11 Micron, 10.5 s/100mL/sq inch Flow Rate, Grade 1, 42.5mm Diameter (Pack of 100) by whatman - **How much does it cost?** 160 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/28253875-1001-042-quantitative-filter-paper-circles-11-micron-10-5) ## Best For - whatman enthusiasts ## Why This Product - Trusted whatman brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Reliable 10.5 Flow Rate:** Ensures efficient filtration without compromising clarity—ideal for routine and advanced applications. - • **Versatile Grade 1 Quality:** Trusted across food, agriculture, air pollution, and educational labs for dependable performance. - • **Optimal 11 Micron Retention:** Captures fine particulates with medium retention, balancing speed and accuracy effortlessly. - • **Precision-Cut 42.5mm Circles:** Perfectly sized for consistent lab results and seamless integration into your workflow. - • **Pack of 100 for Continuous Use:** Bulk supply keeps your lab running smoothly—never run out during critical experiments. ## Overview Whatman Grade 1 Quantitative Filter Paper Circles (42.5mm) offer medium retention at 11 microns and a flow rate of 10.5 s/100mL/sq inch, making them the go-to choice for diverse lab applications including food testing, agriculture, air pollution monitoring, and educational use. Packaged in convenient sets of 100, these cellulose filter papers deliver consistent, reliable filtration for both routine and specialized analytical separations. ## Description This Whatman 4.25cm, grade 1, cellulose filter paper is the most widely used filter paper for routine applications with medium retention (11µm) and flow rate. Traditionally, this grade is used in qualitative analytical separations for precipitates such as lead sulfate, calcium oxalate (hot), and calcium carbonate. In agriculture, it is used for soil analysis and seed testing procedures. It is also used for numerous routine techniques in the food industry to separate solid foodstuffs from associated liquid or extracting liquid; and is widely used in education for teaching simple qualitative analytical separations. In air pollution monitoring, using circles or rolls, atmospheric dust is collected from airflow and the stain-intensity is measured photometrically. For gas detection, the paper is impregnated with a chromogenic reagent and color formation is quantified by optical reflectance. Retention: 11µm. Diameter: 4.25cm. 100/Pack. Whatman #: 1001-042. ## Features - 4.25cm - Grade 1 - Covers a wide range of laboratory applications; frequently used for clarifying liquids - Areas of use include the food industry, agriculture, air pollution monitoring, and gas detection - Widely used in education for teaching simple qualitative analytical separations ## Technical Specifications | Specification | Value | |---------------|-------| | Customer Reviews | 4.1 out of 5 stars 23 Reviews | ## Images ![1001-042 Quantitative Filter Paper Circles, 11 Micron, 10.5 s/100mL/sq inch Flow Rate, Grade 1, 42.5mm Diameter (Pack of 100) - Image 1](https://m.media-amazon.com/images/I/612Nq1-V77L.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: What's a good product to use the smaller ones with? Amazon sell anything good?** A: You question makes no sense at all. **Q: If needed, can these be cut to fit a specific size of funnel? Or would I be better off just buying some of the square filters and cutting those?** A: Buy the correct size for your Buckner funnel; if you are using a gravity funnel, look up how to fold round filter paper for this type filter. **Q: Will these tolerate chlorinated solvents or will they dissolve?** A: This filters will tolerate ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by D***P on January 20, 2021* ### ⭐⭐⭐⭐ Review *by D***R on January 2, 2014* ### ⭐⭐⭐⭐⭐ Review *by C***G on November 4, 2021* ## Frequently Bought Together - Whatman 1001-042 Quantitative Filter Paper Circles, 11 Micron, 10.5 s/100mL/sq inch Flow Rate, Grade 1, 42.5mm Diameter (Pack of 100) - Weigh Boats Medium (100ml, 125 Pack) Disposable Plastic Trays for Scale, Anti-Static Square Tray Weighing Dishes, Polystyrene Lab Dish for Powder Weight, Mixing Epoxy, Food Sample Container, Pour Boat - ALDON Innovating Science 0.1M Hydrochloric Acid, 1L Excellent for Chemistry or Refinement Experiments - The Curated Chemical Collection --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/28253875-1001-042-quantitative-filter-paper-circles-11-micron-10-5](https://www.desertcart.pl/products/28253875-1001-042-quantitative-filter-paper-circles-11-micron-10-5) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-24*