GR 613 Filter Paper Circles 100 Circles/PK. 100PK/CS. 15.00cm diameter circles. Qualitative High Purity Filter Paper. Medium filtration speed abs. Weight 70g/m2 Thickness 0.17mm Herzberg 114sec/100ml Rapidity 60ml/min Capillary Rise 25mm Retention 6um smooth 70% cotton/30% wood fiber. Exact Match 71440-014

Advantec MFS Inc.
Mfg Item # : N05B15.0CM
Advantec Quantitative Ashless Filter Papers are made from the highest quality alpha cotton cellulose. One critical step in the manufacturing process of these filter papers is acid washing. All grades are double acid washed in hydrochloric then hydrofluoric acid to reduce levels of SiO2, CaO, and Fe2O3. Following the acid wash, all papers are rinsed in ultrapure water to neutralize. Grade No. 4A Hardened is further treated with nitric acid. Following the acid wash, all papers are rinsed in ultrapure water to neutralize. Ash Content: 0.01% (except Grade No. 4A is 0.025%). Grade No. 3 Medium retention, fast flow rate paper with good chemical resistance and wet strength. Recommended for analysis of soils, fertilizers, cement, and minerals. Nominal Retention: 5 µm. Grade No. 5A Retains coarse and gelatinous ppt with high flow rates. Filter hydroxides, metalic aerosols, environmetnal monitoring, and determine silica content in steel. Nominal Retention: 7 µm. Grade No. 5B Retains medium size ppt such as CaCo3, PbSO4, AgCl. General purpose paper. Nominal Retention: 4 µm. Grade No. 5C High retention efficiency collecting fine ppt such as BaSO4 with slow flow rate. Gravimetric analysis and collecting particles that tend toward colloidal dispersion. Nominal Retention: 1 µm. Grade No. 6 Retains medium-fine particulates. Use for precision analysis of trace and precious metals, beverages, water. Nominal Retention: 3 µm. Grade No. 7 Highest purity paper for medium particulates. Fast flow rate. Recommended for precise gravimetric analysis of minute trace and precious metals. Nominal Retention: 4 µm. Grade No. 4A Hardened, smooth low ash paper with superior wet strength. Retains fine crystalline ppt with slow flow rate. Suitable for Buchner filtrations, high pressure, high chemical and pH resistance. Nominal Retention: 1 µm. Please Note: ALL Advantec items have a maximum 48 hour cancellation window. Any cancellations AFTER the 48 hour window will incur a restocking fee equal to the cost of the product.

Cytiva - Whatman 1440-125 Quantitative Filter Paper 125mm
Quantitative Filter Paper, Grade: 40, Type: circle, Diameter: 125 mm, AirFlow rate: 19.3 s/100 mL/in2, Basis Weight: 95 g/m2, Burst Strength: 0.034 bar wet burst Exact Match 28475-081

Cytiva - Whatman 1005-090 Grade 5 Filter Paper
9.0cm diameter. Very useful in clarification of cloudy solutions. Widely used in water analysis. Fine porosity. Slow flow rate. 2.5um particle retention. Exact Match 28462-069

Cytiva - Whatman 1440-185 Grade 40 Quantitative Filter Paper, Ashless
18.5cm diameter. For gravimetric analyses of cement, clay, iron, and steel, as a primary filter in soil analysis, for determination of sediment in milk, and to clean prior to AA spectrophotometry. Medium porosity. Medium flow rate. 8um particle retention. Exact Match 28475-128

Cytiva - Whatman 1004-090 Grade 4 Filter Paper
9.0cm diameter. For rapid filtering with excellent retention of coarse particles and gelatinous precipitates. Good rapid filter for cleanup of biological fluids or organic extracts. For air pollution monitoring. Coarse porosity. Fast flow rate. 20-25um particle retention. Exact Match 28460-063

GR615 Filter Paper Sheets 1000 sheets/PK. 8 x 8 Qualitative High Purity Filter Paper. Fast filtration speed/absorbence. Weight 70g/m2 Thickness 0.26mm Herzberg 29sec/100ml Rapidity 235ml/min Capillary Rise 32mm Retention 25um Creped surface 70% cotton/30% wood fiber. Exact Match 28342-056

GR509 Fluted Filter Paper Circles 100 Pleated Circles/Pack 10 Packs/CS. 32.00cm diameter circles. Medium Filtration speed absorbence. Exact Match 28334-192

Cytiva - Whatman 1001-090 Grade 1 Filter Paper
9.0cm diameter. For a wide range of laboratory applications, liquid clarification, gas filtration, air pollution analysis, and soil analysis. Medium porosity. Medium flow rate. 11um particle retention. Exact Match 28450-081