ISO 777:2005 PDF

Scope: This International Standard specifies the procedure for the determination of acid-soluble calcium by atomic absorption spectrometry or by plasma emission spectrometry. It is applicable to all kinds of paper, board and pulp. It specifies a method to determine the acid-soluble part of the incineration residue, i.e. that part of the ignition residue obtained after incineration that is soluble in hydrochloric acid. If the residue is completely soluble, the result obtained by the procedure specified in this International Standard is taken as the total amount of calcium in the sample.

ISO 777:2005 Referenced Document

ISO 1762 Paper, board, pulps and cellulose nanomaterials — Determination of residue (ash content) on ignition at 525 °C*， 2019-07-17 Update
ISO 186 Paper and board - Sampling to determine average quality
ISO 287 Paper and board - Determination of moisture content of a lot - Oven-drying method*， 2017-11-01 Update
ISO 638 Paper, board and pulps - Determination of dry matter content - Oven-drying method*， 2008-10-01 Update
ISO 7213 Pulps — Sampling for testing*， 2021-12-07 Update

2005 ISO 777:2005 Paper, board and pulp - Determination of acid-soluble calcium
2001 ISO 777:2001 Paper, board and pulp - Determination of calcium
1982 ISO 777:1982 Pulps; Determination of calcium content; EDTA titrimetric and flame atomic absorption spectrometric methods