Whatman Quantitative Filter Papers, Ashless, Grade 42, 9 cm, 100/pk
$57.60 Original price was: $57.60.$14.72Current price is: $14.72.
Description
Ashless: 0.007% ash maximum for Grades 40 to 44 and a maximum of 0.01% for the 589 Grades – very pure filters suitable for a wide range of critical analytical filtration procedures.
Acid hardened to give high wet strength and chemical resistance with extremely low ash content.
The tough surface makes these filters suitable for a wide range of critical filtration procedures.
Particle Retention: >2.5m.
Porosity: Medium.
Filtration Speed: ASTM, 240 seconds; Herzberg, 1870 seconds.
Surface: Smooth, dense texture.
Highly retentive, for very fine precipitates.
Normal loading; limited wet strength.
Laboratory standard for critical gravimetric analysis.
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