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Whatman filter paper # 1 - flat discs

grade 1:11 one


These cellulose filters are widely used in qualitative analyzes to determine and identify materials.

Pleated qualitative filters are available on request, which guarantee higher flow rates and load capacities than equivalent flat filters.

Most used filter paper for routine applications with medium retention capacity and flow rate.

The range includes round filters with a diameter of 10 to 500 mm and 460 x 570 mm sheets.

This filter is also available in the Whatman FilterCup version: a practical disposable polypropylene filter funnel, 70 mm in diameter and with a capacity of 250 ml, equipped with an integrated thermo-bonded filter.

This type of filter covers a wide range of laboratory applications and is often used for liquid clarification.

It is commonly used in qualitative analytical separations for precipitates such as lead sulphate, calcium oxalate (at elevated temperature) and calcium carbonate.

In agriculture, it is used for soil analyzes and germination tests.

In the food industry, grade 1 filter paper is used in a number of routine methods for separating solid food substances from associated liquids or extraction liquids and is widely used in teaching for the display of simple qualitative analytical separations.

In air pollution monitoring, discs or rolls are used to collect atmospheric dust from the air stream and measure the intensity of the color photometrically. For gas detection, the paper is impregnated with a chromogenic reagent and the color formed is quantified by reflectance.

Grade 1: 11 µm

Technical features

Nominal retention of particles in liquids (at 98% efficiency)

11 µm

Nominal thickness

180 µm

Typical water flow

57 ml / min

Nominal base weight

87 g / m²

Nominal air flow

13 s / 100 ml / in (for 9 cm diameter)

Nominal ash content

(determined by incinerating the filter at 900 ° C in the air)

0.06%

Material

Cellulose

Typical levels of trace elements

Aluminum 3.6 µg / g Antimony <0.5 µg / g Arsenic <0.5 µg / g Barium <0.5 µg / g Boron

Applications

Filter paper used for routine applications with medium retention and flow rate.

It covers a wide range of laboratory applications and is often used for liquid clarification.

Format

Discs

Pieces per pack

100 pieces

Code Description
481001042 Whatman filter paper n.1 - flat discs diam. 42.5 mm
481001047 Whatman filter paper n.1 - flat discs diam. mm 47
481001055 Whatman filter paper n.1 - flat discs diam. 55 mm
481001070 Whatman filter paper n.1 - flat discs diam. 70 mm
481001085 Whatman filter paper n.1 - flat discs diam. 85 mm
481001090 Whatman filter paper n.1 - flat discs diam. 90 mm
481001110 Whatman filter paper n.1 - flat discs diam. 110 mm
481001125 Whatman filter paper n.1 - flat discs diam. 125 mm
481001150 Whatman filter paper n.1 - flat discs diam. 150 mm
481001185 Whatman filter paper n.1 - flat discs diam. 185 mm
481001240 Whatman filter paper n.1 - flat discs diam. 240 mm
481001270 Whatman filter paper n.1 - flat discs diam. 270 mm
481001320 Whatman filter paper n.1 - flat discs diam. 320 mm
481001325 Whatman filter paper n.1 - flat discs diam. 25 mm
481001329 Whatman filter paper n.1 - flat discs diam. 30 mm
481001332 Whatman filter paper n.1 - flat discs diam. 32 mm
481001385 Whatman filter paper n.1 - flat discs diam. 385 mm
481001400 Whatman filter paper n.1 - flat discs diam. 400 mm
481001500 Whatman filter paper n.1 - flat discs diam. 500 mm

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