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Whatman™ 1540-185
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Whatman™ Grade 540 Hardened Ashless Quantitative Filter Paper, 185 mm dia

Quantitative Filter Paper, 185 mm dia, High-quality Cotton Linters, Grade 540, Hardened Ashless Grade Type, Circle Format, 160 µm Thickness, 8 µm Particle Retention in Liquid, 85 g/m2 Nominal Basis Weight, 200 Secs (Herzberg) Filtration Speed

  • Manufacturer Part No: 1540-185
  • SECO Part No: 12-4915-08
  • Sold As:
  • Availability: loading

GE'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. GE Healthcare's Life Sciences 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. GE'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.

Diameter : 185 mm
Grade : Grade 540
Material (ml/min) : High-quality Cotton Linters
Ash Content : 0.006%
Grade Type : Hardened Ashless
Type : Quantitative
Dry Burst Pressure : 186 kPa/27 psi
Filtration Speed : 200 sec (Herzberg)
Format : Circle
Nominal Air Flow Rate : 13 sec/100 ml/in2
Nominal Basis Weight : 85 g/m2
Particle Retention in Liquid : 8 µm
Thickness : 160 µm
Typical Water Flow Rate : 97 ml/min2
Wet Burst Pressure : 48.3 kPa/7 psi
Loading Capacity : N
  • 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 secs)
  • High chemical resistance to strong acid and alkali suspensions
  • Frequently used in the gravimetric analysis of metals in acid/alkali solutions and in collecting hydroxides after precipitation by strong alkalis

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