Qualitative, hardened low ash and ashless

Cellulose filters made from high quality cotton. The filters are used in qualitative analysis techniques to determine and identify substances. Some grades are reinforced with a stable resin, making them resistant to moisture.Hardened low ash:

Treatment with strong acids to improve chemical resistance and strength after wetting.
Smooth and strong surface for the recovery of the precipitates.
0,015% ash maximum.

Hardened without ash:

Treatment with acids for improved strength after wetting in combination with a very low ash residue.
Smooth and strong surface for a large variety of manipulations.
0,006% ash maximum.

Grade	Filtration rate / aspect	Retention (µm)	Thickness (µm)	Weight (g/m²)
50	slow	2,7	115	97
52	average	7	175	101
54	very fast	20-25	185	92
540	average	8	160	88
541	fast	20-25	155	82
542	slow	2,7	150	93

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1 - 24 of 56 products

CODE	ARTICLE	PACKAGING
CODE: QD1450042	Filterpaper Whatman +ash diam.185mm grade 50	PACKAGING: Box (100) / Carton (100)
CODE: QD1450055	Filterpaper Whatman +ash diam.55mm grade 50	PACKAGING: Box (100) / Carton (100)
CODE: QD1450070	Filterpaper Whatman +ash diam.70mm grade 50	PACKAGING: Box (100) / Carton (100)
CODE: QD1450090	Filterpaper Whatman +ash diam.90mm grade 50	PACKAGING: Box (100) / Carton (100)
CODE: QD1450110	Filterpaper Whatman +ash diam.110mm grade 50	PACKAGING: Box (100) / Carton (100)
CODE: QD1450125	Filterpaper Whatman +ash diam.125mm grade 50	PACKAGING: Box (100) / Carton (100)
CODE: QD1450150	Filterpaper Whatman +ash diam.150mm grade 50	PACKAGING: Box (100) / Carton (100)
CODE: QD1450185	Filterpaper Whatman +ash diam.185mm grade 50	PACKAGING: Box (100) / Carton (100)
CODE: QD1450240	Filterpaper Whatman +ash diam.240mm grade 50	PACKAGING: Box (100) / Carton (100)
CODE: QD1450320	Filterpaper Whatman +ash diam.320mm grade 50	PACKAGING: Box (100) / Carton (100)
CODE: QD1450993	Filterpaper Whatman +ashes surface cleaning grade 50	PACKAGING: Box (100) / Carton (100)
CODE: QD1452090	Filterpaper Whatman +ash diam.90mm grade 52	PACKAGING: Box (100) / Carton (100)
CODE: QD1452110	Filterpaper Whatman +ash diam.110mm grade 52	PACKAGING: Box (100) / Carton (100)
CODE: QD1452125	Filterpaper Whatman +ash diam.125mm grade 52	PACKAGING: Box (100) / Carton (100)
CODE: QD1452150	Filterpaper Whatman +ash diam.150mm grade 52	PACKAGING: Box (100) / Carton (100)
CODE: QD1452240	Filterpaper Whatman +ash diam.240mm grade 52	PACKAGING: Box (100) / Carton (100)
CODE: QD1454055	Filterpaper Whatman +ash diam.55mm grade 54	PACKAGING: Box (100) / Carton (100)
CODE: QD1454070	Filterpaper Whatman +ash diam.70mm grade 54	PACKAGING: Box (100) / Carton (100)
CODE: QD1454090	Filterpaper Whatman +ash diam.90mm grade 54	PACKAGING: Box (100) / Carton (100)
CODE: QD1454110	Filterpaper Whatman +ash diam.110mm grade 54	PACKAGING: Box (100) / Carton (100)
CODE: QD1454125	Filterpaper Whatman +ash diam.125mm grade 54	PACKAGING: Box (100) / Carton (100)
CODE: QD1454150	Filterpaper Whatman +ash diam.150mm grade 54	PACKAGING: Box (100) / Carton (100)
CODE: QD1454185	Filterpaper Whatman +ash diam.185mm grade 54	PACKAGING: Box (100) / Carton (100)
CODE: QD1454240	Filterpaper Whatman +ash diam.240mm grade 54	PACKAGING: Box (100) / Carton (100)