Ashless hardened filter paper for quantitative analysis

Description Specifications Ordering information

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.

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	Order
FP025DF540QANC01	25	DF540	1000circle/box	Order
FP025DF542QANC01	25	DF542	1000circle/box	Order
FP040DF541QANC01	40.5	DF541	100circle/box	Order
FP042DF541QANC01	42.5	DF541	100circle/box	Order
FP047DF541QANC01	47	DF541	100circle/box	Order
FP055DF541QANC01	55	DF541	100circle/box	Order
FP070DF541QANC01	70	DF541	100circle/box	Order
FP090DF541QANC01	90	DF541	100circle/box	Order
FP110DF541QANC01	110	DF541	100circle/box	Order
FP125DF541QANC01	125	DF541	100circle/box	Order
FP150DF541QANC01	150	DF541	100circle/box	Order
FP185DF541QANC01	185	DF541	100circle/box	Order
FP240DF541QANC01	240	DF541	100circle/box	Order
FP320DF541QANC01	320	DF541	100circle/box	Order
FP040DF540QANC01	40.5	DF540	100circle/box	Order
FP042DF540QANC01	42.5	DF540	100circle/box	Order
FP047DF540QANC01	47	DF540	100circle/box	Order
FP055DF540QANC01	55	DF540	100circle/box	Order
FP070DF540QANC01	70	DF540	100circle/box	Order
FP090DF540QANC01	90	DF540	100circle/box	Order
FP110DF540QANC01	110	DF540	100circle/box	Order
FP125DF540QANC01	125	DF540	100circle/box	Order
FP150DF540QANC01	150	DF540	100circle/box	Order
FP185DF540QANC01	185	DF540	100circle/box	Order
FP240DF540QANC01	240	DF540	100circle/box	Order
FP320DF540QANC01	320	DF540	100circle/box	Order
FP040DF542QANC01	40.5	DF542	100circle/box	Order
FP042DF542QANC01	42.5	DF542	100circle/box	Order
FP047DF542QANC01	47	DF542	100circle/box	Order
FP055DF542QANC01	55	DF542	100circle/box	Order
FP070DF542QANC01	70	DF542	100circle/box	Order
FP090DF542QANC01	90	DF542	100circle/box	Order
FP110DF542QANC01	110	DF542	100circle/box	Order
FP125DF542QANC01	125	DF542	100circle/box	Order
FP150DF542QANC01	150	DF542	100circle/box	Order
FP185DF542QANC01	185	DF542	100circle/box	Order
FP240DF542QANC01	240	DF542	100circle/box	Order
FP320DF542QANC01	320	DF542	100circle/box	Order

Ashless hardened filter paper for quantitative analysis

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