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Filter paper, Grade No.541, Hardened ashless 90mm diameter, Whatman

Code: 1541-090

Variation ID		Product Code	Pack Size	List Price	Qty
25075	photo_camera	1541-090	100 Pack 1541-090	£35.59

Pack: 100 Pack

£35.59

Overview

Whatman Grade 541 acid hardened cellulose filter paper features high wet-strength, high chemical resistance, and a large nominal particle retention for fast analytical filtration.

High wet-strength

High chemical resistance to strong acid and alkali suspensions

Retention of gelatinous precipitate

22 µm nominal particle retention rating

Fast flow rate (Herzberg filtration speed 34 s)

Maximum of 0.006% ash concentration

Along with fast Grade 541 filter paper, the hardened, ashless range from Cytiva's business includes general-purpose Grade 540 and Grade 542 for fine particle retention. All three paper grades are appropriate for use in gravimetric analysis with strong acids and alkali samples.

Gelatinous precipitate retention

Hardened ashless filter paper is recommended when fast filtration of a gelatinous precipitate for gravimetric analysis is performed on a strongly acidic or alkali solution. Applications of Grade 541 papers include:

Use as an animal foodstuff filter for determining fiber content
Determination of gelatin content in milk and cream
Quantification of chloride in cement, as well as chloride and phosphorous in coal and coke

Sample preparation

Grade	Grade 541
Format	Circles
Type	Hardened Ashless
Typical Particle Retention in Liquid	22µm
Nominal thickness	155 µm
Typical water flow rate at 45 psi (3.1 bar)	359 ml/min
Nominal basis weight	78 g/m²
Nominal air flow rate	3 s/100 mL/in²
Nominal Ash Content	0.005%
Material	High-quality cotton linters
Alpha Cellulose Content Min.	≥98%
Typical Trace Element Levels	Aluminium 3.4 µg/g Antimony <0.5 µg/g Arsenic <0.5 µg/g Barium <0.5 µg/g Boron <1 µg/g Calcium 14.7 µg/g Chromium 1.1 µg/g Copper 8.2 µg/g Iron 16.3 µg/g Lead <0.5 µg/g Magnesium 3.3 µg/g Manganese <0.5 µg/g Mercury <0.5 µg/g Potassium 3.7 µg/g Silicon <6 µg/g Sodium 17 µg/g Zinc 87.8 µg/g
Application	Typical applications include fiber in animal foodstuffs, gelatine in milk and cream, chloride in cement, and chloride and phosphorous in coal and coke.