CEN/TS 15916-1:2011

SLOVENSKI STANDARD
01-januar-2012
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Copper and copper alloys - Determination of tellurium content - Part 1: Low tellurium
content – Flame atomic absorption spectrometric method (FAAS)
Kupfer und Kupferlegierungen - Bestimmung des Tellurgehaltes - Teil 1: Niedriger
Tellurgehalt - Flammenatomabsorptionsspektrometrisches Verfahren (FAAS)
Cuivre et alliages de cuivre - Dosage du tellure - Partie 1: Tellure en faible teneur -
Méthode par spectrométrie d'absorption atomique dans la flamme
Ta slovenski standard je istoveten z: CEN/TS 15916-1:2011
ICS:
77.040.30 Kemijska analiza kovin Chemical analysis of metals
77.120.30 Baker in bakrove zlitine Copper and copper alloys
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL SPECIFICATION
CEN/TS 15916-1
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
February 2011
ICS 77.120.30
English Version
Copper and copper alloys - Determination of tellurium content -
Part 1: Low tellurium content - Flame atomic absorption
spectrometric method (FAAS)
Cuivre et alliages de cuivre - Détermination du tellure - Kupfer und Kupferlegierungen - Bestimmung des
Partie 1: Tellure en faible teneur - Méthode par Tellurgehaltes - Teil 1: Niedriger Tellurgehalt -
spectrométrie d'absorption atomique dans la flamme Flammenatomabsorptionsspektrometrisches Verfahren
(SAAF) (FAAS)
This Technical Specification (CEN/TS) was approved by CEN on 11 October 2010 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their
comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available
promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS)
until the final decision about the possible conversion of the CEN/TS into an EN is reached.

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EUROPÄISCHES KOMITEE FÜR NORMUNG

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© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 15916-1:2011: E
worldwide for CEN national Members.

Contents Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Principle .4
4 Reagents .4
5 Apparatus .5
6 Sampling .5
7 Procedure .5
8 Expression of results .8
9 Precision .9
10 Test report .9
Bibliography . 10

Foreword
This document (CEN/TS 15916-1:2011) has been prepared by Technical Committee CEN/TC 133 “Copper
and copper alloys”, the secretariat of which is held by DIN.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
Within its programme of work, Technical Committee CEN/TC 133 requested CEN/TC 133/WG 10 "Methods of
analysis" to prepare the following Technical Specification:
CEN/TS 15916-1, Copper and copper alloys — Determination of tellurium content — Part 1: Low tellurium
content — Flame atomic absorption spectrometric method (FAAS)
This is one of two parts of the Technical Specification/European Standard for the determination of tellurium
content in copper and copper alloys. The other part is:
EN 15916-2, Copper and copper alloys — Determination of tellurium content — Part 2: Medium tellurium
content — Flame atomic absorption spectrometric method (FAAS)
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria, Croatia, 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 the United Kingdom.

1 Scope
This Technical Specification specifies a flame atomic absorption spectrometric method (FAAS) for the
determination of the tellurium content of copper and copper alloys in form of castings or unwrought or wrought
products.
The method is applicable to products having tellurium mass fractions between 0,000 2 % and 0,020 %.
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.
ISO 1811-1, Copper and copper alloys — Selection and preparation of samples for chemical analysis —
Part 1: Sampling of cast unwrought products
ISO 1811-2, Copper and copper alloys — Selection and preparation of samples for chemical analysis —
Part 2: Sampling of wrought products and castings
3 Principle
• Dissolution of a test portion in hydrochloric acid and hydrogen peroxide.
• Precipitation of tellurium by hypophosphorous acid in the presence of arsenic.
After filtration, dissolution of the precipitate with hydrochloric acid - hydrogen peroxide mixture followed, after
suitable dilution, by aspiration of the test solution into an air/acetylene flame of an atomic absorption
spectrometer. Measurement of the absorption of the 214,3 nm line emitted by a tellurium hollow-cathode
lamp.
4 Reagents
Use only reagents of recognized analytical grade and only distilled water or water of equivalent purity.
4.1 Hydrochloric acid, HCl (ρ = 1,19 g/ml)
4.2 Nitric acid, HNO (ρ = 1,40 g/ml)
4.3 Hypophosphorous acid, H PO ρ = 1,25 g/ml)
3 2
(
4.4 Hydrochloric acid solution, 1 + 1
Add 500 ml of hydrochloric acid (4.1) to 500 ml of water.
4.5 Hydrogen peroxide, H O 30 % solution (ρ = 1,11 g/ml)
2 2,
4.6 Arsenic(III) oxide, 4,0 g/l solution
Dissolve 4,0 g of arsenic(III) oxide (As O ) in 100 ml of water with the addition of 10 ml of hydrochloric acid
2 3
solution (4.4), heat gently. Dilute with water to 1 000 ml and mix.
4.7 Arsenic(III) oxide, 0,8 g/l solution
Dilute 100 ml of arsenic(III) oxide solution (4.6) in water to 500 ml.
4.8 Tellurium stock solution, 0,1 g/l Te
Weigh (0,1 ± 0,001) g of tellurium (Te > 99,9 %) and transfer it into a 250 ml beaker. Add 20 ml of nitric acid
(4.2) and dissolve on a steam bath. Transfer to a 1 000 ml one-mark volumetric flask. Dilute to the mark with
water and mix.
Prepare this solution immediately prior to use.
1 ml of this solution contains 100 µg of Te.
4.9 Tellurium standard solution, 0,025 g/l Te
Transfer 25,0 ml of the tellurium stock solution (4.8) to a 100 ml one-mark volumetric flask. Dilute to the mark
with water and mix.
Prepare this solution immediately prior to use.
1 ml of this solution contains 25 µg of Te.
4.10 Hydrochloric acid - hydrogen peroxide mixture
Mix 10 ml of hydrochloric acid (4.1) and 5 ml of hydrogen peroxide (4.5).
Prepare this solution immediately prior to use.
5 Apparatus
5.1 Membrane filter,
...