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Ahlstrom-Munksjo

Qualitative Filter Papers, Ahlstrom 601

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Ahlstrom's qualitative grades of filter paper are, by definition, recommended for use in analytical methods, which determine or identify particulate constituents of a mixture irrespective of the amount present. Qualitative filter papers are often used in routine separation work that still requires high purity and consistent performance.

Ahlstrom offers a complete range of low ash filter papers for general laboratory work that provides you with the correct combination of particle retention, filtration speed, loading capacity and wet-strength. All our qualitative grades consist of > 95% super refined a-cellulose and linter fibers.

Key Features

  • Quantitative analysis
  • Low ash content 0.06%
  • Untreated
  • High wet-strength
  • Consistent performance
  • Wet-strengthened grades available
  • Custom cut
  • Bulk packaging

Ahlstrom 601: 2.5µm – Medium Speed

This grade covers a wide range of laboratory applications and is used for clarifying liquids and for rapid filtration of coarser precipitates such as lead sulfate, lead chromate, calcium oxalate, calcium carbonate, aluminum phosphate, barium carbonate and beryllium hydroxide. Ahlstrom 601 can be found in soil analysis, seed testing and in air pollution to collect dust-laden air and is also commonly used in the food industry to separate foodstuffs from associated liquid or extracting liquid.

Environmental Laboratory Applications:

ASTM E1963-09.A2 Standard Guide for Conducting Terrestrial Plant Toxicity Tests: Root Elongation

Seeds are incubated under controlled conditions in petri dishes with filter paper, such as Grade 601, prior to measuring the root length to determine if a potentially toxic substance has affected the growth rate.

STM 2710.H Tests on Sludges: Time-to-Filter

This simpler measurement correlates with the capillary suction time measured in STM 2710.G. Either Grade 601 or 642 may be used.

STM 5510B Aquatic Humic Substances: Diethylaminoethyl (DEAE) Method

Humic substances are a major portion of organic matter within soil. In this method they are concentrated through column chromatography on DEAE cellulose prior to measurement. The filter used for the preparation of the DEAE is Grade 601.

STM 6651 Glyphosate Herbicide

If suspended matter is present, then the sample is filtered through Grade 601 before being tested for the presence of the herbicide glyphosate.

STM 8310.D Ciliated Protozoa: Growth Inhibition Test

Ciliates can be used to evaluate water and soil quality. Grade 601 is used while preparing the culture.

Mining Laboratory Applications:

ASTM E738-11 Determination of Aluminum in Iron Ore

This procedure calls for a medium textured qualitative filter for aluminum determination. Grade 601 is ideal.

ASTM E945 Zinc Determination in Iron Ore

The zinc is extracted from the ore and precipitated, then collected on Grade 601.

ASTM D3177-02 Total Sulfur in the Analysis Sample of Coal and Coke

There are two filtration stages in this procedure. The first stage requires a qualitative filter to remove the nondissolved portion of the digested material. Grade 601 is recommended for this step. The second step requires a quantitative filter for collecting and
measuring barium sulfate precipitate. Grade 94 is recommended for this step.

STM 2710.H Tests on Sludges: Time-to-Filter

This simpler measurement correlates with the capillary suction time measured in STM 2710.G. Either Grade 601 or 642 may be used.

Construction Laboratory Applications:

ASTM D806-96 Cement Content of Soil/Cement Mixtures

The cement content of a dry soil/cement mixture is determined with this procedure. There are several steps, all of which require filter paper. The first extraction is done with Hydrochloric acid; Grade 601 is recommended. The filtrate is precipitated and
filtered with Grade 54. Again the filtrate is treated and re-filtered with Grade 601. The final precipitate step is filtered with Grade 94.

Typical Grade Properties

Standard
Grades
Retention
in µm
Filtration Speed
Herzberg sec/100mls
Filtration Speed
Rapidity mls/min
Loading
Capacity
6012.512455Medium

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Product Detail
Thomas No.
1218Z22
Mfr. No.
6010-0425
Description
Filter Paper #601 4.25cm
list price/quantitytotal
$0.00
Thomas No.
1218Z23
Mfr. No.
6010-0550
Description
Filter Paper #601 5.5cm
list price/quantitytotal
$0.00
Thomas No.
1218Z24
Mfr. No.
6010-0700
Description
Filter Paper 7cm
list price/quantitytotal
$0.00
Thomas No.
1218Z25
Mfr. No.
6010-0750
Description
Filter Paper #601 7.5cm
Ready to Ship
list price/quantitytotal
$0.00
Thomas No.
1218Z26
Mfr. No.
6010-0900
Description
Filter Paper #601 9cm
Ready to Ship
list price/quantitytotal
$0.00
Thomas No.
1218Z27
Mfr. No.
6010-1100
Description
Filter Paper #601 11cm
Ready to Ship
list price/quantitytotal
$0.00
Thomas No.
1218Z28
Mfr. No.
6010-1250
Description
Filter Paper #601 12.5cm
Ready to Ship
list price/quantitytotal
$0.00
Thomas No.
1218Z29
Mfr. No.
6010-1500
Description
Filter Paper #601 15cm
list price/quantitytotal
$0.00
Thomas No.
1218Z30
Mfr. No.
6010-1850
Description
Filter Paper #601 18cm
list price/quantitytotal
$0.00
Thomas No.
1218Z31
Mfr. No.
6010-2050
Description
Filter 20.5cm Eaton-Dike
list price/quantitytotal
$0.00
Thomas No.
1218Z32
Mfr. No.
6010-2400
Description
Filter Paper #601 24cm
list price/quantitytotal
$0.00
Thomas No.
1218Z33
Mfr. No.
6010-2500
Description
Filter Paper #601 25cm
list price/quantitytotal
$0.00
Thomas No.
1218Z34
Mfr. No.
6010-2700
Description
Filter Paper #601 27cm
list price/quantitytotal
$0.00
Thomas No.
1218Z35
Mfr. No.
6010-3200
Description
Filter Paper #601 32cm
list price/quantitytotal
$0.00
Thomas No.
1218Z36
Mfr. No.
6010-3300
Description
Filter 33cm Eaton-Dike
Ready to Ship
list price/quantitytotal
$0.00
Thomas No.
1218Z37
Mfr. No.
6010-3850
Description
Filter Paper #601 38.5cm
list price/quantitytotal
$0.00
Thomas No.
1218Z38
Mfr. No.
6010-4000
Description
Filter Paper #601 40cm
list price/quantitytotal
$0.00
Thomas No.
1218Z39
Mfr. No.
6010-4500
Description
Filter 45.0cm Eaton-Dike
list price/quantitytotal
$0.00
Thomas No.
1218Z40
Mfr. No.
6010-5000
Description
Filter Paper #601 50cm
list price/quantitytotal
$0.00
Thomas No.
0374G13
Mfr. No.
6018-2020
Also known as: B6026-20
Description
Filter Paper 601 Size 20X20cm
list price/quantitytotal
$0.00
Thomas No.
0374G14
Mfr. No.
6018-3356
Description
Filter 33X56C Eaton-Dike
list price/quantitytotal
$0.00
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