Weisner Reagent

£20.00 Exc VAT

Mechanical, or high-yield pulp, which is used to make newsprint, contains most of the lignin originally present in the wood. High quality paper requires the absence of lignin from the pulp. In the paper recycling industry, this solution provides a quick, efficient, very sensitive cost effective way of identifying lignin contaminated paper and avoiding a costly error.

Lignin is an impediment to papermaking as it is coloured, it yellows in air, and its presence weakens the paper.

13 in stock (can be backordered)

SKU: weisner Categories: , Tags: , , , ,

Description

For the macro-detection of lignin.

Apply 1 or 2 drops of the solution to the suspect sample, using the integral dropper. If lignin is present a brilliant red colour develops, owing to the presence of coniferaldehyde groups in the lignin.

For the histological staining of fibres.

Fibres are treated for 2-5 minutes followed by the addition of a few drops of concentrated Hydrochloric Acid, resulting in a bright red colouration for lignified fibres.

In both cases the colour will fade within 30minutes of development.

Weisner reagent will not work on embedded section of fibre.

Additional information

Weight 0.1 kg
Dimensions 3 × 3 × 7 cm
Indicated Use

,

Container Type

Volume (mls)

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