ISO 11400:2021 ニッケル、フェロニッケルおよびニッケル合金—リン含有量の測定—ホスホバナドモリブデン酸塩分光光度法 | ページ 2

Foreword

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The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives ).

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This document was prepared by Technical Committee ISO/TC 155, Nickel and nickel alloys.

This second edition cancels and replaces the first edition (ISO 11400:1992), which has been technically revised. The main changes are as follows:

• the title has been reworded;
• Clause 2 has been updated;
• Clause 3 has been added and the subsequent clauses have been renumbered;
• Clause 4 (the former Clause 3) has been partially reworded;
• Clause 5 (the former Clause 4): the references of several reagents have been added;
• Clause 6 (the former Clause 5) has been partially reworded, namely 6.1;
• Clause 8 (the former Clause 7) has been partially rearranged regarding the numbering of the paragraphs;
• 8.4 (the former 7.7), Table 2 has been added;
• 8.5, “Check samples” has replaced 7.8, “Number of determinations”;
• the Bibliography has been added.

1 Scope

This document specifies a spectrophotometric method for the determination of the phosphorus content in nickel, ferronickels and nickel alloys between 0,000 5 % (by mass) and 0,05 % (by mass).

Arsenic, chromium, hafnium, niobium, silicon, tantalum, titanium and tungsten interfere, but the interferences can be avoided by complexation or volatilization (for chromium). The lowest phosphorus content [0,000 5 % (by mass)] can only be reached in samples with low contents of these interfering elements.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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.

3 Terms and definitions

No terms and definitions are listed in this document.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

Bibliography