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Key Documents

WHA10300009

Whatman® quantitative filter papers, ashless, Grade 589/1 black ribbon

circles, diam. 90 mm, pack of 100

Synonym(s):

Whatman filter, Whatman paper, Z695297, paper filter

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About This Item

UNSPSC Code:
41104900
NACRES:
NB.24

material

cellulose filters
circles

packaging

pack of 100

manufacturer/tradename

Whatman 10300009
Whatman Article No. 28414097 (US reference)

parameter

25 sec/100 mL speed (Herzberg)

diam.

90 mm

thickness

190 μm

ash

≤0.01%

pore size

12-25 μm (Particle retention)

basis weight

80 g/m2

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General description

Whatman quantitative filters are designed for gravimetric analysis and the preparation of samples for instrumental analysis. They are available in three formats designed to meet your specific needs.

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.

Hardened low ash: 0.015% ash maximum-treated with a strong acid to remove trace metals and produce high wet strength and chemical resistance. These filters are particularly suitable for Büchner filtration where the tough smooth surface of the filter makes it easy to recover precipitates.

Hardened ashless: 0.006% ash maximum-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.

Grade 589/1: 12-25 μm (fast filter paper)
‘Black Ribbon Filter′, the established standard in quantitative analysis for the filtration of coarse precipitates (class 2a acc. to DIN 53 135). Ashless filter paper with very high flow rate. Used for many quantitative standard methods, especially for gravimetric applications (e.g., determination of the ash content in foodstuffs), or for the Blaine test in the cement industry.

Features and Benefits

  • Herzberg filtration speed of 50 s*
  • Black ribbon filter′ for Fast filtration of coarse precipitates
  • High purity (< 0.01% ash)
  • Blaine test and ash content test compatible
  • Also available prepleated as Grade 589/1 ½

Other Notes

Field of Use : For internal research use only. Products are not intended for diagnostic use or resale.

Legal Information

Whatman is a registered trademark of Cytiva

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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