Whatman® quantitative filter paper, hardened low-ash, Grade 50 WHA1450070

NACRES:

NB.24

The maximum ash content of these filter paper grades is intermediate between ashless and qualitative grades. They are particularly suitable for Buchner filtrations where it is desirable to recover the precipitate from the filter surface after filtration. Other characteristics include high wet strength and chemical resistance which are similar to the acid hardened ashless filter papers.

Grade 50: 2.7 µm (slow filter paper)
Retention of very fine crystalline precipitates. The thinnest of all Whatman filter papers. Slow flow rate. Hardened and highly glazed surface. This finish also keeps the paper free from loose surface fibers. Highly suitable for qualitative or quantitative filtrations requiring vacuum assistance on Buchner or 3-piece filter funnels. Very strong when wet. Will withstand wet handling and precipitate removal by scraping. In the electronics industry, the virtual absence of fiber shedding is utilized in carriers for integrated circuits.
Field of Use : For internal research use only. Products are not intended for diagnostic use or resale.
Whatman is a registered trademark of Cytiva

material	circles , cotton filters (high-quality cotton linters)
packaging	pack of 100
Торговая марка	Whatman 1450-070, Whatman Article No. 28418079 (US reference)
parameter	2685 sec/100 mL speed (Herzberg), 6 psi wet burst
diam.	70 mm
thickness	0.12115 µm
ash	0.015%
pore size	2.7 µm (Particle retention)
basis weight	97 g/m2