kSIST FprEN ISO 10714:2024

SLOVENSKI STANDARD
oSIST prEN ISO 10714:2024
01-januar-2024
Jeklo in železo - Določevanje fosforja - Fosforovanadomolibdatna
spektrofotometrijska metoda (ISO/DIS 10714:2023)
Steel and iron - Determination of phosphorus content - Phosphovanadomolybdate
spectrophotometric method (ISO/DIS 10714:2023)
Stahl und Eisen - Bestimmung des Phosphorgehaltes - Spektrophotometrisches
Phosphovanadomolybdat-Verfahren (ISO/DIS 10714:2023)
Aciers et fontes - Détermination des teneurs en phosphore - Méthode
spectrophotométrique au phosphomolybdovanadate (ISO/DIS 10714:2023)
Ta slovenski standard je istoveten z: prEN ISO 10714
ICS:
77.040.30 Kemijska analiza kovin Chemical analysis of metals
oSIST prEN ISO 10714:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 10714:2024
oSIST prEN ISO 10714:2024
DRAFT INTERNATIONAL STANDARD
ISO/DIS 10714
ISO/TC 17/SC 1 Secretariat: JISC
Voting begins on: Voting terminates on:
2023-11-14 2024-02-06
Steel and iron — Determination of phosphorus content —
Phosphovanadomolybdate spectrophotometric method
Aciers et fontes — Dosage du phosphore — Méthode par spectrophotométrie au phosphovanadomolybdate
ICS: 77.080.01
This document is circulated as received from the committee secretariat.
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NATIONAL REGULATIONS.
ISO/DIS 10714:2023(E)
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TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023

oSIST prEN ISO 10714:2024
ISO/DIS 10714:2023(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 10714
ISO/TC 17/SC 1 Secretariat: JISC
Voting begins on: Voting terminates on:

Steel and iron — Determination of phosphorus content —
Phosphovanadomolybdate spectrophotometric method
Aciers et fontes — Dosage du phosphore — Méthode par spectrophotométrie au phosphovanadomolybdate
ICS: 77.080.01
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2023
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 10714:2023(E)
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ii
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023

oSIST prEN ISO 10714:2024
ISO/DIS 10714:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Reagents . 2
6 Apparatus . 3
7 Sampling and sample preparation . 4
8 Procedure .4
8.1 Test portion . 4
8.2 Blank test . 4
8.3 Determination . 4
8.3.1 Preparation of the test solution . 4
8.3.2 Colour development and extraction . 5
8.3.3 Spectrophotometric measurement . 5
8.4 Establishment of the calibration curve . 6
8.4.1 Preparation of calibration solutions . 6
8.4.2 Spectrophotometric measurements . 6
8.4.3 Plotting the calibration curve . 6
9 Expression of results . 6
9.1 Method of calculation . 6
9.2 Precision . . . 7
10 Test report . 7
Annex A (informative) Additional information on the international interlaboratory test .8
Annex B (informative) Graphical presentation of precision data . 9
Bibliography .10
iii
oSIST prEN ISO 10714:2024
ISO/DIS 10714:2023(E)
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
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
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).
ISO draws attention to the possibility that the implementation of this document may involve the use
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www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 17, steel, Subcommittee SC 1, Methods of
determination of chemical composition.
This second edition cancels and replaces the first edition (ISO 10714:1992), which has been technically
revised.
The main changes are as follows:
— a complete revaluation of the precision data.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
oSIST prEN ISO 10714:2024
DRAFT INTERNATIONAL STANDARD ISO/DIS 10714:2023(E)
Steel and iron — Determination of phosphorus content —
Phosphovanadomolybdate spectrophotometric method
1 Scope
This document specifies a spectrophotometric method for the determination of phosphorus in steel
and iron.
The method is applicable to phosphorus contents between 0,001 0 % (mass fraction) and 1,0 % (mass
fraction).
Arsenic, hafnium, niobium, tantalum, titanium and tungsten interfere in determining phosphorus, but
the interferences can be partially overcome by formation of complexes and use of small quantities of
test portion. Depending on the concentration of the interfering elements, the application ranges and
test portions given in Table 1 apply.
The lower end of the application range can only be reached in test samples with low contents of the
interfering elements.
Table 1 — Application ranges and test portions
Maximum content of the interfering elements, Test portion, Application range,
% (mass fraction) g % (mass fraction)
As Hf Nb Ta Ti W 1,0 0,001 to 0,010
0,05 0,1 1 0,1 2 2 0,25 0,005 to 0,040
0,2 0,5 5 0,5 10 8 0,10 0,010 to 0,100
0,5 1,5 10 1,0 25 25 0,25 0,100 to 1,00
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.
ISO 385, Laboratory glassware — Burettes
ISO 648, Laboratory glassware — Single-volume pipettes
ISO 1042, Laboratory glassware — One-mark volumetric flasks
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemical
composition
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
oSIST prEN ISO 10714:2024
ISO/DIS 10714:2023(E)
— IEC Electropedia: available at https:// www .electropedia .org/
4 Principle
Dissolution of a test portion in an oxidizing acid mixture.
Fuming with perchloric acid and removal of chromium as volatile chromyl chloride.
Complexing of silicon and the refractory elements with hydrofluoric acid and complexing of the excess
of hydrofluoric acid with orthoboric acid.
Conversion of phosphorus to phosphovanadomolybdate in presence of perchloric and nitric acids.
Extraction of phosphovanadomolybdate by 4-methyl-2-pentanone in presence
...