ISO 17812:2007 紙、板、パルプ—総マグネシウム、総カルシウム、総マンガン、総鉄、総銅の測定 | ページ 2

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 17812 was prepared by Technical Committee ISO/TC 6, Paper, board and pulps.

Introduction

This International Standard combines the determination of magnesium (Mg), calcium (Ca), manganese (Mn), iron (Fe) and copper (Cu) into one single standard. The scope of this International Standard includes the acid-soluble part of the elements plus that part of the elements that may remain insoluble after dissolution of the incineration residue with hydrochloric acid. This International Standard is complementary to the following International Standards, which measure only the acid-soluble part of the element.

ISO 777, Paper, board and pulp — Determination of acid-soluble calcium

ISO 778, Paper, board and pulp — Determination of acid-soluble copper

ISO 779, Paper, board and pulp — Determination of acid-soluble iron

ISO 1830, Paper, board and pulps — Determination of acid-soluble manganese

1 Scope

This International Standard specifies the procedure for the determination of total magnesium, total calcium, total manganese, total iron and total copper by atomic absorption spectrometry or by plasma emission spectrometry. The total content comprises the acid-soluble part of the element plus the acid-insoluble part of the element.

It is applicable to all types of paper, board and pulps.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.