Ashless hardened filter paper for quantitative analysis

Ashless hardened filter paper for quantitative analysis

Ashless hardened Filter papers are acid hardened which reduce 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 come, which increase the strength of the paper, therefore making them particularly suitable for Büchner filter funnels and 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. Also, full compliance with international standards on this subject is achieved.

Thanks to the hardened texture, they are often used when the analist must recover the precipitates retained on the filter surface.

Category:

DF541 GRADE – Fast filtration
Hardened ashless filter paper with a fast flow rate. Preferably used for the 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.
DF540 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.
DF542 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.

 

Part No. Diameter（mm） Grade Pack
FP025DF541QANC01 25 DF541 1000circle/box

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FP025DF540QANC01 25 DF540 1000circle/box

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FP025DF542QANC01 25 DF542 1000circle/box

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FP040DF541QANC01 40.5 DF541 100circle/box

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FP042DF541QANC01 42.5 DF541 100circle/box

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FP047DF541QANC01 47 DF541 100circle/box

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FP055DF541QANC01 55 DF541 100circle/box

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FP070DF541QANC01 70 DF541 100circle/box

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FP090DF541QANC01 90 DF541 100circle/box

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FP110DF541QANC01 110 DF541 100circle/box

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FP125DF541QANC01 125 DF541 100circle/box

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FP150DF541QANC01 150 DF541 100circle/box

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FP185DF541QANC01 185 DF541 100circle/box

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FP240DF541QANC01 240 DF541 100circle/box

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FP320DF541QANC01 320 DF541 100circle/box

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FP040DF540QANC01 40.5 DF540 100circle/box

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FP042DF540QANC01 42.5 DF540 100circle/box

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FP047DF540QANC01 47 DF540 100circle/box

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FP055DF540QANC01 55 DF540 100circle/box

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FP070DF540QANC01 70 DF540 100circle/box

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FP090DF540QANC01 90 DF540 100circle/box

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FP110DF540QANC01 110 DF540 100circle/box

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FP125DF540QANC01 125 DF540 100circle/box

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FP150DF540QANC01 150 DF540 100circle/box

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FP185DF540QANC01 185 DF540 100circle/box

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FP240DF540QANC01 240 DF540 100circle/box

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FP320DF540QANC01 320 DF540 100circle/box

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FP040DF542QANC01 40.5 DF542 100circle/box

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FP042DF542QANC01 42.5 DF542 100circle/box

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FP047DF542QANC01 47 DF542 100circle/box

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FP055DF542QANC01 55 DF542 100circle/box

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FP070DF542QANC01 70 DF542 100circle/box

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FP090DF542QANC01 90 DF542 100circle/box

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FP110DF542QANC01 110 DF542 100circle/box

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FP125DF542QANC01 125 DF542 100circle/box

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FP150DF542QANC01 150 DF542 100circle/box

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FP185DF542QANC01 185 DF542 100circle/box

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FP240DF542QANC01 240 DF542 100circle/box

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FP320DF542QANC01 320 DF542 100circle/box

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