BS ISO 778-2005 PDF

Full title and description

STB BS ISO 778-2005 — Paper, board and pulp — Determination of acid‑soluble copper. This listing refers to the national adoption (STB) of the British adoption of ISO 778:2005 (BS ISO 778:2005), which reproduces the ISO procedure for determining the acid‑soluble fraction of copper in paper, board and pulp samples.

Abstract

Specifies a laboratory procedure to determine acid‑soluble copper in paper, board and pulps by atomic absorption spectrometry (AAS) or by plasma emission spectrometry after incineration of the sample and extraction of the acid‑soluble residue in hydrochloric acid. The method is applicable to all types of paper, board and pulp; the typical limit of determination is about 0.1 mg/kg, depending on the instrument used.

General information

• Status: Withdrawn (ISO edition withdrawn and superseded by a consolidated method).
• Publication date: 2005‑05 (ISO third edition published May 2005 / BS adoption mid‑May 2005).
• Publisher: International Organization for Standardization (ISO); published as a British adoption by the British Standards Institution (BSI) as BS ISO 778:2005 (national STB adoption varies by country).
• ICS / categories: 85.040 (Pulps); 85.060 (Paper and board).
• Edition / version: Edition 3 — 2005 (ISO 778:2005 / adopted as BS ISO 778:2005).
• Number of pages: ISO edition: 6 pages (ISO published version); BS adoption/packaging versions commonly list more pages (e.g. 14 pages in some BS distributors' copies) due to national forewords and prefatory material.

Scope

Defines a method to determine the acid‑soluble part of the incineration residue from paper, board or pulp: the part soluble in hydrochloric acid. Where the residue is totally soluble, the result is taken as the total copper content. Applicable for routine laboratory analysis and quality control of paper and pulp products. The procedure covers sample incineration, extraction, and analysis by AAS or plasma emission spectrometry.

Key topics and requirements

• Preparation and incineration of sample to obtain ignition residue.
• Extraction of the acid‑soluble fraction of the residue using hydrochloric acid.
• Quantification of copper by atomic absorption spectrometry (AAS) or by plasma emission spectrometry (ICP‑OES / ICP‑AES), with typical detection limit around 0.1 mg/kg.
• Requirements for reagents, calibration, blanks and control samples to ensure reliable quantitation.
• Reference to related sampling and test standards (for example ISO 186 for sampling to determine average quality).

Typical use and users

Used by analytical laboratories, quality control departments in pulp and paper mills, raw material testing labs, environmental testing services, and standards bodies. Typical applications include product quality verification, regulatory compliance checks for recovered‑paper contaminants, and R&D when assessing metal contamination or chemical additives in paper products.

Related standards

ISO 778:2005 was later consolidated into broader element‑determination standards; it was superseded by ISO 12830 (which combines procedures for multiple acid‑soluble elements). Other related methods include ISO 1762 (ash on ignition), ISO 17812 (total element determinations) and ISO 186 (sampling). The consolidation into ISO 12830 places the copper determination into a multi‑element context.

Keywords

paper testing, pulp analysis, acid‑soluble copper, atomic absorption spectrometry, ICP, incineration residue, BS ISO 778, ISO 778:2005, element determination

FAQ

Q: What is this standard?

A: It is the ISO method (adopted by BSI as BS ISO 778:2005 and referenced here as STB BS ISO 778‑2005) that specifies how to determine the acid‑soluble copper content of paper, board and pulps using AAS or plasma emission spectrometry.

Q: What does it cover?

A: The method covers sample incineration to obtain ash, extraction of the acid‑soluble portion with hydrochloric acid, and measurement of copper by AAS or plasma emission techniques; it includes reagent, calibration and quality control guidance appropriate for routine laboratory analysis.

Q: Who typically uses it?

A: Analytical and quality laboratories in the pulp and paper industry, independent testing labs, material compliance teams and standards organizations use this method for product testing and contamination checks.

Q: Is it current or superseded?

A: ISO 778:2005 has been withdrawn and its content consolidated into ISO 12830 (and subsequent revisions). Users are advised to consult the consolidated ISO 12830 series or the latest national adoption for the currently accepted method.

Q: Is it part of a series?

A: Yes — the copper determination originally in ISO 778 formed part of a family of paper/pulp analytical methods (ISO 777, ISO 779, ISO 1830, ISO 9668, etc.) that were later brought together in ISO 12830 and later revisions for multi‑element acid‑soluble determinations.

Q: What are the key keywords?

A: Acid‑soluble copper; paper and pulp analysis; atomic absorption spectrometry (AAS); ICP/plasma emission; incineration residue; BS ISO 778; ISO 12830; quality control.