Grade 540 Ashless General Lab Filter Paper, Circle

Description

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

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.

Parameter	Grade 540 Ashless General Lab Filter Paper, Circle
Grade :	Grade 540
Typical Particle Retention in Liquid¹ :	8 µm
Nominal Thickness :	160 µm
Typical water flow rate² :	97 ml/min
Nominal Basis Weight :	85 g/m²
Nominal Air Flow Rate :	13 s/100 mL/in²
Nominal Ash Content³ :	0.005%
Material :	High-quality cotton linters
Alpha Cellulose Content Min. :	≥98%
Typical Trace Element Levels:	Aluminium 3.4 µg/g Antimony less than 0.5 µg/g Arsenic less than 0.5 µg/g Barium less than 0.5 µg/g Boron less than 1 µg/g Calcium 14.7 µg/g Chromium 1.1 µg/g Copper 8.2 µg/g Iron 16.3 µg/g lead less than 0.5 µg/g Magnesium 3.3 µg/g Manganese less than 0.5 µg/g Mercury less than 0.5 µg/g Potassium 3.7 µg/g Silicon less than 6 µg/g Sodium 17 µg/g Zinc 87.8 µg/g
Application :	Frequently used in the gravimetric analysis of metals in acid/alkali solutions and in collecting hydroxides after precipitation by strong alkalis
Format & Dimensions :	Circle – Ø21 mm, Ø24 mm, Ø42.5 mm, Ø55 mm, Ø90 mm, Ø110 mm, Ø125 mm, Ø150 mm, Ø185 mm, Ø240 mm, Ø320 mm,
Pack Size :	100 pieces