ISO 4800:1998 実験用ガラス器具—分液漏斗と滴下漏斗 | 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 3.

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.

International Standard ISO 4800 was developed by Technical Committee ISO/TC 48, Laboratory glassware and related apparatus, Subcommittee SC 2, General laboratory glassware (other than measuring).

This second edition cancels and replaces the first edition (ISO 4800:1977) by incorporating the following changes:

• a) dimensions and tolerances have been brought up to date;
• b) materials have been modified according to ISO 3585;
• c) separating funnels type 2 (pear-shaped) have been modified;
• d) separating funnels type 3 (Gilson type) have been cancelled.

A bibliography lists additional ISO standards for other general-purpose laboratory glassware.

Introduction

Separating funnels are used in laboratories for liquid/liquid extractions and they are intended to facilitate the separation into layers of two immiscible liquids of different density.

Dropping funnels have a cylindrical body and are used for adding reagent solutions to a reaction vessel. They are, therefore, often provided with a ground cone at the bottom, for joining to vessels with conical ground necks.

1 Scope

This International Standard specifies details of an internationally acceptable series of glass separating funnels and dropping funnels suitable for general use in laboratories.

2 Normative references

The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards.

Bibliography