ru-RUuk-UAen-GB

Quantitative ashless filter paper

Full description
These CHM® filter papers are used for quantitative analysis and designed for preparation of samples and gravimetric analysis. They are made of refined pulp and linters with virtually 100% of alpha-cellulose content. These filter papers are guaranteed free of possible residual acids used in some production methods. Extremely low percentage of ash content (maximum ash content of 0.007%).

Ashless filter papers for quantitative analyses are suitable for Buechner funnels and for filtration under pressure.

F2040 GRADE – Medium slow-filtration

The classic general purpose ashless filter paper with a medium-to-slow filtering rate.

Suitable for typical applications include gravimetric analysis for numerous components and for all kind of pre-filtrations. Used as a primary filter for separating solid matter from aqueous extracts, in tests for fat and oil in water, in general soil analysis, quantitative determination of sediments in milk, as well as in analytical grade clean-up filter for solutions prior to AA spectro-photometry. Suitable for finer precipitates such as hot barium sulphate.

F2041 GRADE – Fast filtration

Fast ashless filter paper in the CHM® quantitative range together with F2045.

It is particularly suitable for analytical procedures and tests involving large particles or gelatinous precipitates (e.g. metal hydroxides and sulphides).
It is also used in metal (Pb) tests in water testing analysis, quantitative air pollution analysis, food industry, paper industry, etc.

F2042 GRADE – Very slow filtration

An ashless world standard filter for critical gravimetric analysis.

With slow filtering rate and fine particle retention.

Typical analytical precipitates such as cold barium sulphate, lead sulphate, zinc and nickel sulphides, etc.

F2043 GRADE - Medium filtration

Ashless filter with medium filtration speed and good retention (between Grade F2040 and Grade F2041) of medium and thick particles.
Suitable for gravimetric measurements of gypsum/lime suspensions in power plants.

F2043 Grade is particularly applied in metallurgical industry laboratories for metal tests. Typical applications include foodstuffs analysis, soil analysis, particle collection in air pollution monitoring, COD and TOC determination, inorganic analysis in the construction, mining and steel industries, for Blaine test in the cement industry (standards UNE 80-112-91 and EN 196-6), and for carrying out other chemical analysis on cement.

F2044 GRADE – Slow filtration

Thinner version of No. F2042 but with higher flow rate (twice as fast as No. F2042).

Very fine particles but with lower ash weight per sample.

F2045 GRADE – Very fast filtration

Filter paper of very high rate of filtration, wide-pored, soft, spongy structure, extremely low-ash content.

Food industry applications: determination of ash contents and PCB determination in foodstuffs.

Beverage industry applications: processing (ashing) fruit juice samples for photometric determinations (e.g. phosphate). Environmental analysis: Determination of filterable substances and the residue on ignition (dry weight) for the examination of water, waste water and sludge (DIN 38 409 part 2)

Ashless hardened filter paper for quantitative analysis



Hardened Ashless Filter papers are acid hardened which reduces the ash content to an extremely low level.

These filters are produced by a complex elaborate washing process under stringently controlled conditions. Firstly, acid washing is arranged. Then a series of washes in demineralised water comes, which increase the strength of the paper, thus making them particularly suitable for Buechner filter funnels and for a wide range of critical analytical filtration operations.

Through this process, a maximum ash content of 0.006% is attained, which means that no contaminants are introduced when filtering and also that full compliance with international standards on this subject is achieved.

F2140 GRADE – Medium filtration

Hardened ashless filter paper with medium retention and flow rate

Extremely strong and pure. With a hard surface, it is recommended for filtering medium-sized precipitates such as most metal sulphides.
High chemical resistance. Used in the gravimetric analysis of metals in acid and slightly alkalinized solutions, pressure filtration.

F2141 GRADE - Fast filtration

Hardened ashless filter paper with fast flow rate. Preferably used in filtration of coarse flocculent and bulky precipitates (as aluminium, chromium or hydroxides of iron, bismuth, cobalt, sulphides of copper, various organic metal precipitates, etc.) and gelatinous precipitates in acid/alkaline solutions during gravimetric analysis.

F2142 GRADE - Slow filtration

Hardened ashless filter paper with high retention and slow flow rate.
High chemical resistance. Often used for filtering very fine precipitates and in gravimetric metal determinations.

Hardened low ash filter paper for quantitative analysis



These filters, made from cotton linters fiber, are put through a washing process and treated with strong acids. Then they are washed in demineralised water to produce high wet strength (makes them appropriate for filtering in low pressure or vacuum conditions) and chemical resistance (makes them suitable to work with acids or alkaline solutions in moderate concentrations). A very low ash-content filter with a 0.015% (the maximum ash contents of these filters is intermediate between CHM® qualitative grades and ashless quantitative grades).

A very smooth surface makes easy to recover the whole of the precipitate after the filtration which is particularly indicated for Buchner filtrations.

F2050 GRADE – Slow filtration

CHM filter with slow filtering rate, with excellent retention of very fine particles, such as barium sulphate, zinc sulphide, etc. Hardened and glazed surface makes this paper suitable for use in the electronic industry in carriers of electronic components or boards.

F2052 GRADE - Medium-fast filtration

General purpose hardened filter paper with medium-rate filtering, with good retention of medium particles, such as calcium oxalate and metal sulphides.
Suitable for various tests on the intake of atmospheric pollution (sulphur oxides, ammonia gases, etc) as well as for microbiological water analysis.
They are used in fat extraction equipment as well in the oilseed and food industries, and in a large number of routine analytic procedures.

F2054 GRADE - Fast filtration

The fastest filter paper in the range.

Suitable for filtering coarse, gelatinous or dense liquids. Good load capacity.
Product specification
GRADE PROPERTIES WEIGTH,           g/m2 THICKNESS, µm RETENTION RANGE, µm ASH CONTENT,       %
F2040 Medium-slow 85 170  7-9 <0.007
F2041 Fast 85 190 20-25 <0.007
F2042 Very slow 100 160  2-3 <0.007
F2043 Medium 85 180 14-17 <0.007
F2044 Slow 85 160  2-4 <0.007
F2045 Very fast 85 210 25-30 <0.007
F2140 Medium 84 160  7-12 <0.006
F2141 Fast 84 170 20-25 <0.006
F2142 Slow 95 150  2-4 <0.006
F2050 Slow 90 180  2-3 <0.015
F2052 Medium-Fast 90 190  7-8 <0.015
F2054 Fast 90 200 20 <0.015
Order information
DIAMETER (mm) F2040 F2041 F2042 F2043 F2044 F2045
                                CIRCLES (1000/box)
 12.7 F2040-012 F2041-012 F2042-012 F2043-012 F2044-012 F2045-012
25 F2040-025 F2041-025 F2042-025 F2043-025 F2044-025 F2045-025
                                   CIRCLES (*) (100/box)
40.5 F2040-040 F2041-040 F2042-040 F2043-040 F2044-040 F2045-040
42.5 F2040-042 F2041-042 F2042-042 F2043-042 F2044-042 F2045-042
47 F2040-047 F2041-047 F2042-047 F2043-047 F2044-047 F2045-047
50 F2040-050 F2041-050 F2042-050 F2043-050 F2044-050 F2045-050
55 F2040-055 F2041-055 F2042-055 F2043-055 F2044-055 F2045-055
70 F2040-070 F2041-070 F2042-070 F2043-070 F2044-070 F2045-070
80 F2040-080 F2041-080 F2042-080 F2043-080 F2044-080 F2045-080
90 F2040-090 F2041-090 F2042-090 F2043-090 F2044-090 F2045-090
100 F2040-100 F2041-100 F2042-100 F2043-100 F2044-100 F2045-100
110 F2040-110 F2041-110 F2042-110 F2043-110 F2044-110 F2045-110
125 F2040-125 F2041-125 F2042-125 F2043-125 F2044-125 F2045-125
150 F2040-150 F2041-150 F2042-150 F2043-150 F2044-150 F2045-150
185 F2040-185 F2041-185 F2042-185 F2043-185 F2044-185 F2045-185
200 F2040-200 F2041-200 F2042-200 F2043-200 F2044-200 F2045-200
240 F2040-240 F2041-240 F2042-240 F2043-240 F2044-240 F2045-240
270 F2040-270 F2041-270 F2042-270 F2043-270 F2044-270 F2045-270
320 F2040-320 F2041-320 F2042-320 F2043-320 F2044-320 F2045-320
SIZE (mm) SHEETS (100/pack)
460x570 F2040-460570 F2041-460570 F2042-460570 F2043-460570 F2044-460570   F2045-460570
580x580 F2040-580580 F2041-580580 F2042-580580 F2043-580580 F2044-580580   F2045-580580
DIAMETER (mm) F2140 F2141 F2142 F2050 F2051 F2054
                                 CIRCLES (1000/box)
25 F2140-025 F2141-025 F2142-025
                                   CIRCLES (*) (100/box)
42.5 F2140-042 F2141-042 F2142-042 F2050-042 F2052-042 F2054-042
47 F2140-047 F2141-047 F2142-047 F2050-047 F2052-047 F2054-047
50 F2140-050 F2141-050 F2142-050 F2050-050 F2052-050 F2054-050
55 F2140-055 F2141-055 F2142-055 F2050-055 F2052-055 F2054-055
70 F2140-070 F2141-070 F2142-070 F2050-070 F2052-070 F2054-070
80 F2140-080 F2141-080 F2142-080 F2050-080 F2052-080 F2054-080
90 F2140-090 F2141-090 F2142-090 F2050-090 F2052-090 F2054-090
100 F2140-100 F2141-100 F2142-100 F2050-100 F2052-100 F2054-100
110 F2140-110 F2141-110 F2142-110 F2050-110 F2052-110 F2054-110
125 F2140-125 F2141-125 F2142-125 F2050-125 F2052-125 F2054-125
150 F2140-150 F2141-150 F2142-150 F2050-150 F2052-150 F2054-150
185 F2140-185 F2141-185 F2142-185 F2050-185 F2052-185 F2054-185
200 F2140-200 F2141-200 F2142-200 F2050-200 F2052-200 F2054-200
240 F2140-240 F2141-240 F2142-240 F2050-240 F2052-240 F2054-240
270 F2140-270 F2141-270 F2142-270 F2050-270 F2052-270 F2054-270
320 F2140-320 F2141-320 F2142-320 F2050-320 F2052-320 F2054-320
SIZE (mm) SHEETS (100/pack)
460x570       F2050-460570 F2052-460570 F2054-460570
580x580 F2050-580580 F2052-580580 F2054-580580
(*) Add an F at the end of the reference for folded circles (e.g. F2040-150F) 
Downloads
01.pdf
ПРИЛОЖЕНИЯ.pdf

To get information about: «Quantitative ashless filter paper» contact us by phone (044) 229 15 31 or fill in the form.
E-mail
Phone
First name
Family name
Country
Company name
Request
Input symbols from the picture