Quantitative Filter Paper, 240 mm dia, Cotton Linters, Grade 542

Cytiva's Whatman™ Grade 542 filters are acid hardened to allow high retention of fine precipitates in applications such as metal determinations and hydroxide collection. Along with Grade 542 cellulose filter paper, the Whatman™ range of hardened quantitative papers from Cytiva’s Life Sciences business includes fast Grade 541 and general-purpose Grade 540 filters. All three grades are designed for use in quantitative analysis with strong acid/alkali solutions. Slow flow rate filters for gravimetric determination: Hardened Grade 542 quantitative papers enable high retention of fine particles in chemically harsh conditions. When acting as a gravimetric filter, this cellulose filter paper is therefore well suited for use in capturing fine precipitates in applications such as metal determinations and hydroxide collection.

Diameter	:	240 mm
Grade	:	Grade 542
Material	:	High-quality Cotton Linters
Ash Content	:	0.01%
Sterility	:	Non-sterile
Grade Type	:	Hardened Ashless
Type	:	Quantitative
Dry Burst Pressure	:	221 kPa/32 psi
Filtration Speed	:	2510 sec/100 ml (Herzberg)
Format	:	Circle
Nominal Air Flow Rate	:	64 sec/100 ml/in2
Nominal Basis Weight	:	96 g/m2
Particle Retention in Liquid	:	2.7 µm
Properties	:	Slow
Thickness	:	150 µm
Typical Water Flow Rate	:	13 ml/min
Wet Burst Pressure	:	414.4 kPa/6 psi
Alpha Cellulose Content	:	=98%
Loading Capacity	:	N

High wet-strengthAcid-hardened for resistance to strong acid and alkali solutionsNominal particle retention rating of 2.7 µmHerzberg filtration speed of 2510 sExtremely low ash content (0.006% ash maximum)Used in gravimetric metal determinations