To see other variants and accessories, please enter the webcode on our website. webcode 721 Filter Papers webcode WW6PB001 Ashless Round Filter Papers for Quantitative Analysis, Hahnemühle Ashless filter papers (mean ash content 0.004 %), recommended for quantitative analysis, routine gravimetric tests and sample preparation for instrumental analysis. • Acid-washed and neutralised with water • Free of minerals and metallic ions, ideal for the detection of trace elements • For analytical applications, quantitative analysis and/or routine gravimetric tests • These filter papers are perfectly qualified for food control, beverage analysis and environmental monitoring Technical specifications: Grade Properties Filtration Herzberg s Retention of particles µm Weight g/m2 Thickness mm 589/1 - black fast 50 12 – 252) 79 0.19 589/2 - white medium fast 140 4 – 122) 85 0.18 589/4 - yellow medium fast, low in fat 170 4 – 7 81 0,17 589/5 - red medium fast 450 2 – 42) 84 0.17 589/6 - green slow, thin 900 2 74 0,16 589/3 - blue slow 7501) <2 84 0.16 1) Measured with 100 mm water column instead of 50 mm 2) Approximate values Ø mm PU pc/Pack 589/1 - black 589/2 - white 589/4 - yellow 589/5 - red 589/3 - blue Order No. Order No. Order No. Order No. Order No. 12.7 1000 10 15 90125 40.5 100 10 15 90405 47 100 10 15 91147 10 15 93147 55 100 10 15 91055 10 15 92055 10 15 95055 10 15 93955 70 100 10 15 91070 10 15 92070 10 15 93070 90 100 10 15 91090 10 15 92090 10 15 94090 10 15 95090 10 15 93090 110 100 10 15 91110 10 15 92110 10 15 94110 10 15 95110 10 15 93110 125 100 10 15 91125 10 15 92125 10 15 94925 10 15 95125 10 15 93125 150 100 10 15 91150 10 15 92150 10 15 94950 10 15 95150 10 15 93150 185 100 10 15 91185 10 15 92185 10 15 93185 240 100 10 15 91240 10 15 93240 Other sizes on request. webcode WW6PB002 Ashless Round Hardened Filter Papers for Quantitative Analysis, Hahnemühle Ashless hardened filter papers (mean ash content 0.002%), recommended particularly for vacuum and pressure filtration and the filtration of acidic and alkaline solutions. • Acid-washed and neutralised with water • Free of minerals and metallic ions, ideal for the detection of metallic ions • Precipitations can be wiped off or washed off easily and free of fibres • High resistance to aggressive chemical components, like sulphuric and nitric acids (up to 40% at 50° Celsius) and bases (up to 10% at 20° Celsius) Technical specifications: Grade Properties Filtration Herzberg s Retention of particles µm Weight g/m2 Thickness mm 1505 fast 50 12 – 252) 88 0.17 1506 medium fast 170 4 – 122) 90 0.16 1507 slow 6001) <22) 90 0.14 1) Measured with 150 mm water column instead of 50 mm 2) Approximate values Ø mm PU pc/Pack 1505 1506 1507 Order No. Order No. Order No. 110 100 10 15 95210 125 100 10 15 94185 10 15 98125 10 15 97125 150 100 10 15 94150 10 15 96150 10 15 97150 185 100 10 15 97186 240 100 10 15 96240 Other sizes on request. Separating Systems Filtration
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