Chemical analysis of ferrous materials - Determination of phosphorus in non-alloyed steels and irons - Molybdenum blue spectrophotometric method

This European Standard specifies a method for the molybdenum blue spectrophotometric determination of phosphorus in non-alloyed steels and irons.
The method is applicable to non-alloyed steels and irons with phosphorus contents from 0,005 % to 0,25 % (m/m).

Chemische Analyse von Eisenwerkstoffen - Bestimmung von Phosphor in unlegierten Stählen und Eisen - Spektralphotometrisches Verfahren über Molybdänblau

Diese Europäische Norm legt ein spektralphotometrisches Verfahren zur Bestimmung von Phosphor in unlegierten Stählen und Eisen fest.
Das Verfahren ist für Phosphoranteile zwischen 0,005 % und 0,25 % (m/m) in unlegierten Stählen und Eisen anwendbar.

Analyse chimique des matériaux sidérurgiques - Dosage du phosphore dans les aciers et fontes non alliés - Méthode par spectrophotométrie d´absorption moléculaire

La présente Norme européenne spécifie une méthode de détermination spectrophotométrique au bleu de molybdène du phosphore dans les aciers et les fontes non alliés.
La méthode est applicable aux aciers et aux fontes non alliés dont la teneur en phosphore est comprise entre 0,005 % et 0,25 % (m/m).

Kemična analiza železovih zlitin – Določevanje fosforja v malolegiranih jeklih in železovih litinah – Spektrofotometrična metoda z molibdenovim modrim

General Information

Status
Published
Publication Date
14-Feb-2006
Current Stage
9093 - Decision to confirm - Review Enquiry
Due Date
03-Mar-2020
Completion Date
06-Jul-2020

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SLOVENSKI STANDARD
SIST EN 10184:2006
01-maj-2006
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SIST EN 10184:1997/AC1:1997

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Chemical analysis of ferrous materials - Determination of phosphorus in non-alloyed

steels and irons - Molybdenum blue spectrophotometric method
Chemische Analyse von Eisenwerkstoffen - Bestimmung von Phosphor in unlegierten
Stählen und Eisen - Spektralphotometrisches Verfahren über Molybdänblau

Analyse chimique des matériaux sidérurgiques - Dosage du phosphore dans les aciers

et fontes non alliés - Méthode par spectrophotométrie d´absorption moléculaire
Ta slovenski standard je istoveten z: EN 10184:2006
ICS:
77.040.30 Kemijska analiza kovin Chemical analysis of metals
SIST EN 10184:2006 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 10184:2006
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SIST EN 10184:2006
EUROPEAN STANDARD
EN 10184
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2006
ICS 77.040.30 Supersedes EN 10184:1989
English Version
Chemical analysis of ferrous materials - Determination of
phosphorus in non-alloyed steels and irons - Molybdenum blue
spectrophotometric method

Analyse chimique des matériaux sidérurgiques - Chemische Analyse von Eisenwerkstoffen - Bestimmung

Détermination du phosphore dans les aciers et fontes non von Phosphor in unlegierten Stählen und Eisen -

alliés - Méthode par spectrophotométrie au bleu de Spektralphotometrisches Verfahren über Molybdänblau

molybdène
This European Standard was approved by CEN on 30 December 2005.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European

Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national

standards may be obtained on application to the Central Secretariat or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official

versions.

CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,

Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,

Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10184:2006: E

worldwide for CEN national Members.
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SIST EN 10184:2006
EN 10184:2006 (E)
Contents Page

Foreword..............................................................................................................................................................3

1 Scope ......................................................................................................................................................4

2 Normative references ............................................................................................................................4

3 Principle..................................................................................................................................................4

4 Reagents.................................................................................................................................................4

5 Apparatus ...............................................................................................................................................6

6 Sampling.................................................................................................................................................6

7 Procedure ...............................................................................................................................................6

8 Expression of results ............................................................................................................................8

9 Note .........................................................................................................................................................9

10 Test report ..............................................................................................................................................9

Annex A (informative) Precision data..............................................................................................................10

Bibliography ......................................................................................................................................................11

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SIST EN 10184:2006
EN 10184:2006 (E)
Foreword

This European Standard (EN 10184:2006) has been prepared by Technical Committee ECISS/TC 20

“Methods of chemical analysis of ferrous products”, the secretariat of which is held by SIS.

This European Standard shall be given the status of a national standard, either by publication of an identical

text or by endorsement, at the latest by August 2006, and conflicting national standards shall be withdrawn

at the latest by August 2006.
This European Standard supersedes EN 10184:1989.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,

Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden,

Switzerland and United Kingdom.
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SIST EN 10184:2006
EN 10184:2006 (E)
1 Scope

This European Standard specifies a method for the molybdenum blue spectrophotometric determination of

phosphorus in non-alloyed steels and irons.

The method is applicable to non-alloyed steels and irons with phosphorus contents from 0,005 % to 0,25 %

(m/m).
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.

EN ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemical

composition (ISO 14284:1996)
3 Principle

Dissolution of a test portion in nitric and hydrochloric acids and controlled addition of perchloric acid.

Formation of the phosphomolybdate complex after removal of silicon and arsenic and reduction with

hydrazine sulphate to molybdenum blue.

Spectrophotometric measurement of the blue complex at a wavelength of 680 nm or 825 nm.

4 Reagents
4.1 General

During the analysis, unless otherwise stated, only reagents of recognized analytical grade shall be used and

only distilled water or water of equivalent purity.

Blank tests shall verify that the relevant reagents are free from phosphorus. Whenever necessary, the

results shall be corrected accordingly. Grades giving high blank values are unsuitable and should be

discarded.
4.2 Hydrochloric acid
ρ about 1,19 g/ml.
4.3 Nitric acid
ρ about 1,40 g/ml.
4.4 Perchloric acid
ρ about 1,67 g/ml.
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SIST EN 10184:2006
EN 10184:2006 (E)
4.5 Hydrofluoric acid
ρ about 1,13 g/ml, diluted 1 + 9.
4.6 Hydrobromic acid
ρ about 1,47 g/ml, diluted 1 + 1.
4.7 Perchloric acid
ρ about 1,67 g/ml, diluted 42 + 58.

420 ml perchloric acid (4.4) shall be carefully poured into 400 ml of water. Swirl, cool, transfer to a 1000 ml

volumetric flask. Dilute to the mark with water and mix.
4.8 Sulphuric acid
ρ about 1,84 g/ml, diluted 3 + 37.

37,5 ml sulphuric acid (ρ about 1,84 g/ml) shall be carefully poured into 300 ml water. Swirl, cool and

transfer to a 500 ml volumetric flask. Dilute to the mark with water and mix.
4.9 Sodium metabisulphite
100 g/l solution.

100 g of dry sodium metabisulphite (Na S O ) shall be dissolved in 500 ml of warm water, filter and collect

2 2 5

the filtrate in a 1000 ml volumetric flask. Cool, dilute to the mark with water and mix.

4.10 Hydrazine sulphate
1,5 g/l solution to be prepared immediately before use.
4.11 Ammonium molybdate
20 g/l solution.

Dissolve 20 g of ammonium molybdate [(NH ) Mo O 4H O] in about 100 ml of diluted sulphuric acid (4.8).

4 6 7 24 2

Dilute to around 500 ml with water. Carefully pour 300 ml of sulphuric acid (4.8) into this solution. Swirl, cool

and transfer to a 1000 ml volumetric flask. Dilute to the mark with water and mix.

4.12 Molybdate reagent
Prepare immediately before use the following mixture:
Add, in order, to a 1000 ml volumetric flask, swirling between additions:
 500 ml of water;
 250 ml of molybdate solution (4.11);
 100 ml of hydrazine sulphate solution (4.10).
Dilute to the mark with water and mix.
...

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