Whatman Filter Paper No.1 12.5cm Pack of 100

£10.77 excl. VAT
£12.92
incl. VAT

SKU - 1159151

1001-125

SKU -

1159151

20 In Stock

Whatman Filter Paper No.1 12.5cm Pack of 100. Part number 1001-125

Whatman No. 1 Filter paper circles and sheets from Cytiva

Grade 1: 11µm particle retention - The most widely used filter paper for routine applications with medium retention and flow rate. Extended range of sizes includes 10mm to 500mm diameter circles and 460mmx570mm sheets.

This grade covers a wide range of laboratory applications and is frequently used for clarifying liquids. Traditionally the grade is used in qualitative analytical separations for precipitates such as lead sulfate, calcium oxalate (hot) and calcium carbonate.

In agriculture, it is used for soil analysis and seed testing procedures. In the food industry, Grade 1 is used for numerous routine techniques to separate solid foodstuffs from associated liquid or extracting liquid and is widely used in education for teaching simple qualitative analytical separations.

In air pollution monitoring, using circles or rolls, atmospheric dust is collected from airflow and the stain-intensity measured photometrically. For gas detection, the paper is impregnated with a chromogenic reagent and colour formation quantified by optical reflectance.

Parameter	Grade 1 Qualitative Filter Paper Standard Grade
Application	Used filter paper for routine applications with medium retention and flow rate. Covers a wide range of laboratory applications and is frequently used for clarifying liquids.
Diameter	see description
Grade	Grade 1
Grade Type	Standard
Material	Cellulose
Nominal Ash Content¹	0.06%
Nominal air flow rate	13 s/100 ml/in²
Nominal basis weight	87 g/m²
Nominal thickness	180 µm
Typical Particle Retention in Liquid²	11 µm
Typical Trace Element Levels	Aluminium 3.6 µg/g Antimony <0.5 µg/g Arsenic <0.5 µg/g Barium <0.5 µg/g Boron <1 µg/g Calcium 27.5 µg/g Chromium 1 µg/g Copper 0.9 µg/g Iron 13.7 µg/g Lead <0.5 µg/g Magnesium 21 µg/g Manganese <0.5 µg/g Mercury <0.5 µg/g Potassium 6.2 µg/g Silicon 8.8 µg/g Sodium 32.3 µg/g Zinc 58.3 µg/g
Typical water flow rate³	57 ml/min
Format	Circles

¹Ash is determined by ignition of the cellulose filter at 900°C in air.

²Particle retention rating at 98% efficiency.

³ Based on a 9 cm diameter paper