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Key Documents

WHA10300143

Whatman® prepleated quantitative filter paper, ashless, Grade 589/2 1/2 white ribbon

circles, diam. 110 mm, pack of 100

别名:

Z695416

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About This Item

分類程式碼代碼:
41104900
NACRES:
NB.24

材料

cellulose filters
circles

包裝

pack of 100

製造商/商標名

Whatman 10300143
Whatman Article No. 28414122 (US reference)

參數

70 sec/100 mL speed (Herzberg)

直徑

110 mm

厚度

180 μm

灰分

≤0.01%

孔徑

4-12 μm (Particle retention)

基重

85 g/m2

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一般說明

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 589/2 1/2: 4-12 μm
′White Ribbon Filter′, prepleated ashless standard filter paper for medium fine precipitates (class 2b acc. to DIN 53 135) offering medium filtration speed. Applied in a variety of routine methods in quantitative analysis, e.g., determination of the sand content in foodstuffs; determination of the grade of flour; or analysis of aqueous suspensions in the paper industry.
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 589/2 ½ : 4-12 μm (medium fast filter paper)
′White Ribbon Filter′, prepleated ashless standard filter paper for medium fine precipitates (class 2b acc. to DIN 53 135) offering medium filtration speed. Applied in a variety of routine methods in quantitative analysis, e.g., determination of the sand content in foodstuffs; determination of the grade of flour; or analysis of aqueous suspensions in the paper industry.

特點和優勢

  • High purity (< 0.01% ash)
  • Retention of medium fine precipitates, such as grains of sand
  • Herzberg filtration speed of 140 s*
  • White ribbon filteR

其他說明

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

法律資訊

Whatman is a registered trademark of Cytiva

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