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Picture of Grade 540 Ashless General Lab Filter Paper, 185 mm circles (100 pcs) 1540-185

Grade 540 Ashless General Lab Filter Paper, 185 mm circles (100 pcs) 1540-185

GR 540 18 5CM 100/PK
Availability: 5 in stock
SKU: 1540-185
Manufacturer: Cytiva
Pack Size: 100

 

Grade 540 Ashless General Lab Filter Paper, 185 mm circles (100 pcs)

Cytiva's Whatman Grade 540 is a high-purity, acid-treated cellulose lab filter paper. Mechanically strong Grade 540 is well suited for quantitative or gravimetric analysis of strongly acidic or alkaline samples.
  • Acid-treated for high wet-strength
  • Extremely low ash content (0.006% ash maximum)
  • Nominal particle retention of 8 µm
  • Medium flow rate (Herzberg filtration speed 200 s)
  • High chemical resistance to strong acid and alkali suspensions
Cytiva's business offers hardened ashless filter paper for a variety of precipitate sizes. Along with general filtration Grade 540, the range includes Grade 542 for retention of fine precipitates and Grade 541 for fast filtration. All three grades are designed for use in gravimetric analysis.
 
Gravimetric analysis of acid and alkali suspensions

Cytiva's hardened, ashless Grade 540 lab filter paper is frequently used as a gravimetric filter during analysis of metals in acidic or alkaline solutions and in the collection of hydroxides. The acid-treated surface prevents tearing during filtration and allows the user to scrape precipitates from the paper.

 
 

Product specifications

Grade 540 Ashless General Lab Filter Paper, 185 mm circles (100 pcs)

GradeGrade 540 
FormatCircles 
TypeHardened Ashless 
Typical Particle Retention in Liquid8 µm 
Nominal thickness160 µm
Typical water flow rate at 45 psi (3.1 bar)97 ml/min 
Nominal basis weight85 g/m²
Nominal air flow rate13 s/100 mL/in² 
Nominal Ash Content0.005% 
MaterialHigh-quality cotton linters 
Alpha Cellulose Content Min.≥98% 
Typical Trace Element LevelsAluminium 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 
ApplicationFrequently used in the gravimetric analysis of metals in acid/alkali solutions and in collecting hydroxides after precipitation by strong alkalis. 

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