Methods of testing cement - Part 10: Determination of the water-soluble chromium (VI) content of cement

This part of EN 196 specifies the method for the determination of the water-soluble chromium (VI) content of cement.
A reference method is described consisting of two stages, an extraction procedure and an analysis of the filtered extract. Guidance on other extraction procedures, suitable for screening tests, for factory production control or other purposes, is given but in case of dispute or failure to comply with a regulatory limit only the reference method is used. The reference method has alternatives whereby the filtered extract may be subjected to an oxidation step or not. The criteria by which the appropriate procedure is selected are set down. Other instrumental procedures may be used for the analysis of the filtered extract provided they are calibrated against the analysis of the filtered extract using the reference procedure. In the case of a dispute, only the reference method is used.
Annex A sets out a normative procedure to be followed in case this test method is used as the basis for evaluation of conformity of a cement with the regulatory limit in Regulation (EC) 1907/2006 .
This part of EN 196 describes a method that applies to cements. It may have wider applicability but this would need to be verified by testing on a product-by-product basis. Guidance in the possible application of this European Standard to the determination of the water-soluble chromium (VI) content of cement-containing preparations is given in Annex B.
Annexes C and D provide information on other test procedures based on paste extraction and thus depart from the performance of cement in its normal conditions of use. They may be carried out with or without the oxidation process. Users should be aware that results using these methods might be significantly different to those obtained by the reference method. In the case of dispute or failure to comply with the regulatory limit only the reference method is used.
Annex E provides guidance on a method for determination of the excess reducing agent content of cement as used in the factory internal control system of some countries. Manufacturers using such an internal control method should ensure themselves of the relevance of results in comparison with testing by the reference method.

Prüfverfahren für Zement - Teil 10: Bestimmung des Gehaltes an wasserlöslichem Chrom (VI) in Zement

Dieser Teil von EN 196 legt das Verfahren zur Bestimmung des Gehaltes an wasserlöslichem Chrom(VI) in Zement fest.
Es wird ein Referenzverfahren beschrieben, das aus zwei Schritten, d. h. aus einem Extraktionsverfahren und einer Analyse des abfiltrierten Extraktes, besteht. Hinweise zu anderen Extraktionsverfahren, die für Eignungsprüfungen, die werkseigene Produktionskontrolle und andere Zwecke geeignet sind, sind angegeben; in Streitfällen oder bei Überschreitung eines gesetzlich vorgeschriebenen Grenzwertes wird jedoch nur das Referenzverfahren angewendet. Das Referenzverfahren enthält alternative Verfahrensschritte, nach denen der filtrierte Extrakt wahlweise einem Oxidationsschritt unterzogen werden darf. Die Kriterien für die Wahl der geeigneten Vorgehensweise sind festgelegt. Andere instrumentelle Verfahren dürfen zur Analyse des abfiltrierten Extraktes verwendet werden, vorausgesetzt, sie sind gegen die Analyse des gefilterten Extraktes mit dem Referenzverfahren kalibriert. Im Streitfall wird nur das Referenzverfahren angewendet.
In Anhang A wird ein normatives Verfahren festgelegt, das bei Anwendung dieses Prüfverfahrens als Grundlage für die Bewertung der Übereinstimmung eines Zementes mit dem in der Verordnung (EU) Nr. 1907/2006 ) angegebenen Grenzwert anzuwenden ist.
Das in diesem Teil von EN 196 beschriebene Verfahren gilt für Zemente. Die Anwendung auf andere Stoffe ist möglich; die Anwendbarkeit müsste jedoch im Einzelfall verifiziert werden. Anhang B enthält Hinweise zur Anwendung dieser Europäischen Norm zur Bestimmung des Gehaltes an wasserlöslichem Chrom(VI) in zementhaltigen Zubereitungen.
Die Anhänge C und D enthalten Angaben zu anderen Prüfverfahren, die auf der Extraktion von Zementleim beruhen und daher von dem Verhalten von Zement unter den üblichen Gebrauchsbedingungen abweichen. Diese Prüfverfahren dürfen mit oder ohne Oxidationsschritt durchgeführt werden. Die Anwender dieser Verfahren sollten sich dessen bewusst sein, dass die mit diesen Verfahren erzielten Ergebnisse sich erheblich von den Ergebnissen mit dem Referenzverfahren unterscheiden können. In Streitfällen oder bei Überschreitung des gesetzlich vorgeschriebenen Grenzwertes wird nur das Referenzverfahren angewendet.
Anhang E enthält Hinweise zu einem Verfahren zur Bestimmung des überschüssigen Reduktions-mittelgehaltes von Zement, welches in einigen Ländern für die werkseigene Produktionskontrolle Anwendung findet. Hersteller, die ein derartiges System für die werkseigene Produktionskontrolle einsetzen, sollten sich der Verwendbarkeit der Ergebnisse durch Vergleich mit der Analyse nach dem Referenzverfahren vergewissern.

Méthodes d'essais des ciments - Partie 10 : Détermination de la teneur en chrome (VI) soluble dans l'eau des ciments

La présente partie de l’EN 196 décrit une méthode permettant la détermination de la teneur en chrome (VI) soluble dans l’eau des ciments.
La méthode de référence décrite comprend deux étapes : un mode opératoire d’extraction et une analyse de l’extrait filtré. Des lignes directrices relatives à d’autres modes opératoires d’extraction convenant pour les essais de screening, pour le contrôle de la production en usine ou à d’autres fins sont fournies, mais en cas de désaccord ou d’incapacité à satisfaire une limite réglementaire, seule la méthode de référence est utilisée. La méthode de référence offre deux possibilités, l’extrait filtré pouvant être soumis à une étape d’oxydation ou non. Les critères de sélection du mode opératoire approprié sont présentés. D’autres modes opératoires instrumentaux peuvent être utilisés pour l’analyse de l’extrait filtré à condition d’être étalonnés par rapport à l’analyse de l’extrait filtré utilisant le mode opératoire de référence. En cas de litige, seule la méthode de référence est utilisée.
L’Annexe A présente un mode opératoire normatif à suivre en cas d’utilisation de la présente méthode d’essai comme base pour l’évaluation de conformité d’un ciment à la limite réglementaire fixée par le règlement (CE) N° 1907/2006 .
La présente partie de l’EN 196 décrit une méthode qui s’applique aux ciments. Son applicabilité peut être plus large, mais des essais au cas par cas sont nécessaires pour le vérifier. L’Annexe B donne des lignes directrices sur l’application de la présente Norme européenne à la détermination de la teneur en chrome (VI) soluble dans l’eau des préparations de ciment.
Les Annexes C et D fournissent des informations concernant d’autres modes opératoires d’essai s’appuyant sur l’extraction à partir d’une pâte et s’écartent donc des performances du ciment dans ses conditions normales d’utilisation. Ils peuvent être réalisés avec ou sans le processus d’oxydation. Il convient que les utilisateurs soient conscients que les résultats obtenus par ces méthodes peuvent être très différents de ceux obtenus par la méthode de référence. En cas de désaccord ou d’incapacité à satisfaire une limite réglementaire, seule la méthode de référence est utilisée.
L’Annexe E fournit des lignes directrices concernant une méthode de détermination de la teneur en agent réducteur excédentaire du ciment telle qu’elle est utilisée dans le système de contrôle interne en usine de certains pays. Il convient que les fabricants utilisant une telle méthode de contrôle interne s’assurent de la pertinence des résultats par rapport aux essais par la méthode de référence.

Metode preskušanja cementa - 10. del: Določevanje vodotopnega kroma (VI) v cementu

Ta del standarda EN 196 določa metodo za ugotavljanje vodotopnega kroma (VI) v cementu.
Opisana je referenčna metoda, sestavljena iz dveh stopenj – postopka izločanja in analize filtriranega izvlečka. Podana so navodila glede drugih postopkov izločanja, ki so primerni za presejalne preskuse, kontrolo proizvodnje v obratu ali druge namene, vendar se v primeru spora ali neizpolnjevanja predpisane omejitve uporabi le referenčna metoda. Za referenčno metodo obstajajo alternativne možnosti, pri čemer je filtrirani izvleček lahko izpostavljen oksidaciji ali pa ne. Opredeljena so merila, po katerih se izbere ustrezen postopek. Za analizo filtriranega izvlečka se lahko uporabljajo drugi instrumentalni postopki, če so umerjeni glede na analizo filtriranega izvlečka z uporabo referenčnega postopka. V primeru spora se uporabi le referenčna metoda.
Dodatek A opredeljuje normativni postopek, ki ga je treba upoštevati, če se ta preskusna metoda uporablja kot osnova za vrednotenje skladnosti cementa s predpisano omejitvijo v Uredbi (ES) št. 1907/2006.
Ta del standarda EN 196 opisuje metodo, ki se uporablja za cement. Ima lahko široko uporabnost, vendar bi bilo treba to preveriti s preskušanjem vsakega izdelka posebej. Navodila o možni uporabi tega evropskega standarda za ugotavljanje vodotopnega kroma (VI) v cementnih pripravkih so podana v dodatku B.
Dodatka C in D vsebujeta informacije o drugih preskusnih metodah, ki temeljijo na izločevanju paste in se tako odmikajo od zmogljivosti cementa v običajnih pogojih njegove uporabe. Izvedene so lahko s postopkom oksidacije ali brez njega. Uporabniki naj bi se zavedali, da se lahko rezultati, pridobljeni z uporabo teh metod, precej razlikujejo od tistih, ki so pridobljeni z referenčno metodo. V primeru spora ali neizpolnjevanja predpisane omejitve se uporabi le referenčna metoda.
Dodatek E vsebuje navodila o metodi za ugotavljanje prekomerne vsebnosti reducentov v cementu, kot se uporablja v sistemu notranje kontrole proizvodnje v nekaterih državah. Proizvajalci, ki uporabljajo takšno metodo notranje kontrole, naj bi se prepričali o ustreznosti njenih rezultatov v primerjavi s preskušanjem z referenčno metodo.

General Information

Status
Published
Public Enquiry End Date
29-Sep-2015
Publication Date
16-Jun-2016
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
18-May-2016
Due Date
23-Jul-2016
Completion Date
17-Jun-2016

Relations

Effective Date
01-Jul-2016
Effective Date
20-Nov-2024

Overview

EN 196-10:2016 - Methods of testing cement: Determination of the water‑soluble chromium (VI) content of cement - specifies a reference method for measuring water‑soluble chromium(VI) in cement. The method is two‑stage: an extraction procedure (designed to approximate commercial use of cement, using standard mortar) and an analysis of the filtered extract (spectrophotometric analysis is the primary technique). The standard defines when an oxidation step is required, gives criteria for selecting procedures, and provides guidance on alternative extraction/screening procedures. Annex A contains a normative procedure for assessing compliance with the regulatory limit in Regulation (EC) No 1907/2006 (REACH).

Key topics and requirements

  • Reference method structure: extraction by preparing standard mortar and filtration, followed by analysis of the filtered extract.
  • Analysis options: spectrophotometric determination with or without a prior oxidation step; laboratories must perform an initial assessment test to decide which route to use.
  • Alternative procedures: other instrumental methods may be used only if calibrated against the reference procedure; paste‑extraction screening methods are described in Annexes C and D but can produce different results.
  • Compliance and dispute resolution: in cases of regulatory limits, conformity assessment or disputes, only the reference method is decisive.
  • Quality and reporting: duplicate testing is required when not under statistical control (minimum single test in series under control); results are expressed as % of cement (reported to four decimal places); blank determinations and repeatability/reproducibility considerations are specified.
  • Guidance annexes: Annex A (normative, REACH compliance), Annex B (cement‑containing preparations), Annex E (excess reducing agent guidance / factory internal control).

Applications and who uses it

  • Cement manufacturers - factory production control and internal quality assurance for chromium(VI) content.
  • Testing and calibration laboratories - performing accredited determinations to EN ISO/IEC 17025 and providing official test reports.
  • Regulatory bodies and conformity assessors - assessing compliance with REACH (Regulation (EC) No 1907/2006) limits on hexavalent chromium.
  • Construction product specifiers, health & safety professionals, and procurement teams - verifying that cements meet regulatory and safety thresholds for chromium(VI).
  • R&D and product development - validating additive effects (reducers or oxidizers) and comparing screening methods against the reference test.

Related standards and keywords

  • Related: EN 196 series (e.g., EN 196‑1, EN 196‑7) and conformity standards EN ISO/IEC 17025, 17020, 17065.
  • SEO keywords: EN 196-10:2016, water‑soluble chromium (VI), chromium(VI) content, cement testing, reference method, REACH Regulation (EC) 1907/2006, spectrophotometry, oxidation step, screening tests, mortar extraction, conformity assessment.

Frequently Asked Questions

SIST EN 196-10:2016 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Methods of testing cement - Part 10: Determination of the water-soluble chromium (VI) content of cement". This standard covers: This part of EN 196 specifies the method for the determination of the water-soluble chromium (VI) content of cement. A reference method is described consisting of two stages, an extraction procedure and an analysis of the filtered extract. Guidance on other extraction procedures, suitable for screening tests, for factory production control or other purposes, is given but in case of dispute or failure to comply with a regulatory limit only the reference method is used. The reference method has alternatives whereby the filtered extract may be subjected to an oxidation step or not. The criteria by which the appropriate procedure is selected are set down. Other instrumental procedures may be used for the analysis of the filtered extract provided they are calibrated against the analysis of the filtered extract using the reference procedure. In the case of a dispute, only the reference method is used. Annex A sets out a normative procedure to be followed in case this test method is used as the basis for evaluation of conformity of a cement with the regulatory limit in Regulation (EC) 1907/2006 . This part of EN 196 describes a method that applies to cements. It may have wider applicability but this would need to be verified by testing on a product-by-product basis. Guidance in the possible application of this European Standard to the determination of the water-soluble chromium (VI) content of cement-containing preparations is given in Annex B. Annexes C and D provide information on other test procedures based on paste extraction and thus depart from the performance of cement in its normal conditions of use. They may be carried out with or without the oxidation process. Users should be aware that results using these methods might be significantly different to those obtained by the reference method. In the case of dispute or failure to comply with the regulatory limit only the reference method is used. Annex E provides guidance on a method for determination of the excess reducing agent content of cement as used in the factory internal control system of some countries. Manufacturers using such an internal control method should ensure themselves of the relevance of results in comparison with testing by the reference method.

This part of EN 196 specifies the method for the determination of the water-soluble chromium (VI) content of cement. A reference method is described consisting of two stages, an extraction procedure and an analysis of the filtered extract. Guidance on other extraction procedures, suitable for screening tests, for factory production control or other purposes, is given but in case of dispute or failure to comply with a regulatory limit only the reference method is used. The reference method has alternatives whereby the filtered extract may be subjected to an oxidation step or not. The criteria by which the appropriate procedure is selected are set down. Other instrumental procedures may be used for the analysis of the filtered extract provided they are calibrated against the analysis of the filtered extract using the reference procedure. In the case of a dispute, only the reference method is used. Annex A sets out a normative procedure to be followed in case this test method is used as the basis for evaluation of conformity of a cement with the regulatory limit in Regulation (EC) 1907/2006 . This part of EN 196 describes a method that applies to cements. It may have wider applicability but this would need to be verified by testing on a product-by-product basis. Guidance in the possible application of this European Standard to the determination of the water-soluble chromium (VI) content of cement-containing preparations is given in Annex B. Annexes C and D provide information on other test procedures based on paste extraction and thus depart from the performance of cement in its normal conditions of use. They may be carried out with or without the oxidation process. Users should be aware that results using these methods might be significantly different to those obtained by the reference method. In the case of dispute or failure to comply with the regulatory limit only the reference method is used. Annex E provides guidance on a method for determination of the excess reducing agent content of cement as used in the factory internal control system of some countries. Manufacturers using such an internal control method should ensure themselves of the relevance of results in comparison with testing by the reference method.

SIST EN 196-10:2016 is classified under the following ICS (International Classification for Standards) categories: 91.100.10 - Cement. Gypsum. Lime. Mortar. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN 196-10:2016 has the following relationships with other standards: It is inter standard links to SIST EN 196-10:2006, oSIST prEN 196-10:2025. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

You can purchase SIST EN 196-10:2016 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.

Standards Content (Sample)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.FHPHQWXPrüfverfahren für Zement - Teil 10: Bestimmung des Gehaltes an wasserlöslichem Chrom (VI) in ZementMéthodes d'essais des ciments - Partie 10 : Détermination de la teneur en chrome (VI) soluble dans l'eau des cimentsMethods of testing cement - Part 10: Determination of the water-soluble chromium (VI) content of cement91.100.10Cement. Mavec. Apno. MaltaCement. Gypsum. Lime. MortarICS:Ta slovenski standard je istoveten z:EN 196-10:2016SIST EN 196-10:2016en,fr,de01-julij-2016SIST EN 196-10:2016SLOVENSKI
STANDARDSIST EN 196-10:20061DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 196-10
May
t r s x ICS
{ sä s r rä s r Supersedes EN
s { xæ s rã t r r xEnglish Version
Methods of testing cement æ Part
s rã Determination of the Méthodes d 5essais des ciments æ Partie
s r ã dans l 5eau des ciments
Prüfverfahren für Zement æ Teil
s rã Bestimmung des This European Standard was approved by CEN on
t r December
t r s wä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey andUnited Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
t r s x CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s { xæ s rã t r s x ESIST EN 196-10:2016

Evaluation of the compliance of cement with the regulatory limit in 47 to Annex XVII of Regulation (EC) No. 1907/2006 on water-soluble hexavalent chromium content . 14 Annex B (informative)
Guidance on the application of this European Standard to the determination of the water soluble chromium (VI) content of cement-containing preparations . 24 Annex C (informative)
Guidance on screening test method (1) using paste extraction - method based on DS 1020 . 26 Annex D (informative)
Guidance on screening test method (2) using paste extraction – method based on TRGS 613 . 29 Annex E (informative)
Guidance on the photometric determination of chromium reduction capacity in cements . 33 Bibliography . 37
The standard has been editorially revised. EN 196 consists of the following parts, under the general title Methods of testing cement: — Part 1: Determination of strength; — Part 2: Chemical analysis of cement; — Part 3: Determination of setting times and soundness; — Part 4: Quantitative determination of constituents (CEN/TR 196-4); — Part 5: Pozzolanicity test for pozzolanic cement; — Part 6: Determination of fineness; — Part 7: Methods of taking and preparing samples of cement; — Part 8: Heat of hydration - Solution method; — Part 9: Heat of hydration - Semi-adiabatic method; — Part 10: Determination of the water-soluble chromium (VI) content of cement. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 196-10:2016

1 Note that Regulation (EC) No 1907/2006 is impacted by Commission Regulation (EU) No 126/2013 of 13 February 2013 amending Annex XVII to Regulation (EC) No 1907/2006 of the European Parliament and of the Council on the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH). SIST EN 196-10:2016

2 Note that Regulation (EC) No 1907/2006 is impacted by Commission Regulation (EU) No 126/2013 of 13 February 2013 amending Annex XVII to Regulation (EC) No 1907/2006 of the European Parliament and of the Council on the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH). SIST EN 196-10:2016

¶ 0,5 mS/m. Unless otherwise stated percent means percent by mass. SIST EN 196-10:2016

(1,5-diphenylcarbohydrazide) in 25 ml of acetone (4.4) in a 50 ml volumetric flask. Make up to the mark with acetone. The indicator solution will keep for one week, if kept refrigerated. 4.6 Standard chromate solution. 4.6.1 Stock solution: Dissolve 0,141 4 g dried potassium dichromate (K2Cr2O7), dried to constant mass at (140 ± 5) °C, in water in a 1 000 ml volumetric flask and make up to the mark with water. The stock solution will keep for one month. This solution contains 50 mg Cr (VI) in a litre. NOTE Ready-to-use stock solution is commercially available. 4.6.2 Standard solution: Transfer 50,0 ml stock solution (4.6.1) to a 500 ml volumetric flask and make up to the mark with water. This solution contains 5 mg Cr (VI) in a litre. The standard solution will keep for one month. 4.7 CEN standard sand, in accordance with EN 196-1. 4.8 Sodium peroxodisulfate (sodium persulfate), Na2S2O8. 4.9 Orthophosphoric acid, H3PO4, (85 %). 5 Apparatus 5.1 Balance(s), analytical balance, capable of weighing to an accuracy of ± 0,000 5 g, and a laboratory balance, capable of weighing to an accuracy of ± 1 g. 5.2 Mixer, two speed in accordance with EN 196-1. 5.3 Spectrophotometer, for measuring the absorbance of a solution at 540 nm, or filter photometer equipped with a filter giving maximum transmission at approximately 540 nm. 5.4 Cells, with a light path of 10 mm. 5.5 Volumetric glassware, 50 ml, 500 ml and 1 000 ml volumetric flasks; 1,0 ml; 2,0 ml; 5,0 ml; 10,0 ml; 15,0 ml and 50,0 ml pipettes. 5.6 pH meter, capable of measuring pH to an accuracy of ± 0,05. 5.7 Filtration system, comprising a vacuum source connected to a vacuum flask fitted with a filter crucible, Buchner funnel or other suitable equipment. SIST EN 196-10:2016

Key 1 mortar 2 filter funnel 3 to vacuum 4 low form beaker 5 filter flask 6 sand Figure 1 — Typical arrangement of filtration equipment Filtration equipment consisting of a Buchner funnel, (e.g. diameter 205 mm, fitted onto a 2 l filter flask), partially full of sand, inside which is a low form beaker to collect the filtrate, placed on top of the bed of sand. The apparatus is connected to a vacuum pump (see Figure 1). Also other arrangements ensuring filtrate collection into containers may be used. 5.10 Laboratory oven, capable of maintaining a temperature of (140 ± 5) °C. 5.11 Heating plate, capable of maintaining a temperature of (280 ± 10) °C. 5.12 Timer, capable of measuring to an accuracy of ± 1 s. 6 Preparation of a test sample of cement Immediately before chemical analysis, treat the laboratory sample, taken in accordance with EN 196-7, as follows to obtain a homogeneous test sample. Take approximately 1 000 g of the laboratory sample by means of a sample divider or by quartering. SIST EN 196-10:2016

20 min after addition of the indicator solution. NOTE If the concentration of chromium (VI) in the sample is greater than the range of calibration curve, repeat the determination, using a smaller aliquot (V2) of the filtrate (7.3). 8.2.3 Determination of chromium (VI) concentration Determine the concentration, (C), of water-soluble chromium (VI) in mg/litre from the calibration curve. 8.3 Measurement of absorbance with oxidation 8.3.1 Construction of the calibration curve 8.3.1.1 Preparation of calibration solutions Weigh (500 ± 1) mg sodium peroxodisulfate (4.8) into 250 ml wide-necked conical flasks, add 5 ml ortho-phosphoric acid (concentration 85 %) (4.9), and 2,0 ml; 4,0 ml; 10,0 ml; 20,0 ml; and 30,0 ml standard solution (4.6.2). 8.3.1.2 Oxidation and measurement of absorbance Dilute the solutions with approximately 120 ml of water and place on a heating plate at (280 ± 10) °C for (45 ± 1) min. In order to avoid boiling retardation add a magnetic stirrer bar. At the end of the 45 min the volume of the solution should be approximately 40 ml. Avoid excessive evaporation in order to prevent decomposition of chromium (VI). Allow to cool and remove the stirrer bar. Transfer the solutions into 100 ml, (V3), volumetric flasks, add 5,0 ml indicator solution (4.5) and make up to the mark with water. The calibration solutions contain respectively 0,1 mg; 0,2 mg; 0,5 mg; 1,0 mg; and 1,50 mg Cr (VI) in a litre. Measure the absorbance of the solution against the procedural blank (3.4) at 540 nm, 15 min to
20 min after addition of the indicator solution. SIST EN 196-10:2016

Evaluation of the compliance of cement with the regulatory limit in 47 to Annex XVII of Regulation (EC) No. 1907/20063 on water-soluble hexavalent chromium content A.1 Foreword Regulation (EC) No. 1907/2006 of the European Parliament and of the Council of 18 December 2006 concerning the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH) prohibits, among other requirements, the marketing and use of cements and cement-containing preparations which, when hydrated, contain more than 0,000 2 % of water-soluble hexavalent chromium, determined as percentage by mass of dry cement. This legislation is intended to minimize the occurrence of chromate-related allergic contact dermatitis arising from the use of cement or cement-containing preparations. It should be noted that limitation of hexavalent chromium will provide improved protection against allergic contact dermatitis only and that use of correct personal protective equipment will still be required for handling wet cement In order to prevent irritant contact dermatitis caused by the highly alkaline nature of cement paste. In order to comply with the regulatory limit it is usually necessary to include a reducing agent during production of the cement or cement-containing preparation, which converts soluble hexavalent chromium into insoluble trivalent chromium during hydration. Regulation (EC) 1907/2006 further requires that the declared storage period for which the reducing agent remains effective in respect of compliance with the regulatory limit, be legibly indicated on packaging and dispatch documentation. CEN/TC 51 “Cement and building limes” added the drafting of a European Standard for a single method for determining hexavalent chromium in cement to its work programme in 2002 (FprEN 196-10). The aim of this normative annex to FprEN 196-10 is to provide a scheme for the evaluation of compliance to the requirements in Regulation (EC) No. 1907/2006. A.2 Scope This European Standard specifies the scheme for the evaluation of compliance with the regulatory limit for water-soluble hexavalent chromium in Regulation (EC) No. 1907/2006 (as implemented by the relevant Member State) applying to cements, based on the manufacturer’s auto control with third-party verification. This European Standard provides technical rules for factory production control by the manufacturer, including auto control testing of samples, and for third-party verification of factory production control. It also provides rules for actions to be followed in the event of non-compliance with the procedure set in place by the manufacturer, or that of exceeding the limit of water-soluble hexavalent chromium, hereafter to be referred to as “water-soluble chromium (VI)”.
3 Note that Regulation (EC) No 1907/2006 is impacted by Commission Regulation (EU) No 126/2013 of 13 February 2013 amending Annex XVII to Regulation (EC) No 1907/2006 of the European Parliament and of the Council on the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH). SIST EN 196-10:2016
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The article discusses the SIST EN 196-10:2016 standard, which specifies a method for determining the water-soluble chromium (VI) content of cement. The standard includes a reference method consisting of an extraction procedure and analysis of the filtered extract. Other extraction procedures suitable for screening tests or factory production control are also provided, but the reference method should be used in case of disputes or failure to comply with regulatory limits. Annex A outlines a procedure for evaluating the conformity of cement with regulatory limits. The standard primarily applies to cements, but its applicability to cement-containing preparations is mentioned in Annex B. Annexes C and D provide information on alternative test procedures, which may yield different results compared to the reference method. In such cases, the reference method should be used to resolve disputes or non-compliance. Annex E offers guidance on determining the excess reducing agent content of cement for factory internal control systems. Manufacturers using this method should ensure the relevance of their results compared to the reference method.

SIST EN 196-10:2016 - 시멘트의 시험 방법 - 제10부: 시멘트의 수용성 크롬(VI) 함량 결정에 대한 기준을 제시한다. 본 기준은 시멘트의 수용성 크롬(VI) 함량을 결정하기 위한 방법을 명시한다. 추출 절차와 여과 물질의 분석으로 구성된 참조 방법을 포함하고 있다. 스크리닝 테스트, 공장 생산 관리 또는 기타 목적에 적합한 다른 추출 절차에 대한 안내도 제공하지만 분쟁이나 규제상한을 준수하지 않을 경우에는 오직 참조 방법만 사용된다. 참조 방법은 여과 물질을 산화 과정을 거치거나 거치지 않을 수 있도록 대체 방법을 가지고 있다. 적절한 절차를 선택하는 기준이 명시되어 있다. 분석에 대한 참조 절차를 사용하여 여과 물질의 분석과 교정하여 측정하는 경우에도 분석에 대한 다른 기기 방법을 사용할 수 있다. 분쟁이 발생한 경우에는 오직 참조 방법만 사용된다. 첨부서 A는 본 테스트 방법이 규제(EC) No. 1907/2006의 규제 상한을 충족하는 시멘트의 준수 평가에 기반이 되는 경우에 따라야 할 표준 절차를 제시한다. 본 기준은 시멘트에 적용되는 방법이지만 제품별 검사를 통해 더 넓은 적용 가능성을 가질 수 있다. 시멘트함유 제품의 수용성 크롬(VI) 함량 결정에 대한 이러한 유럽 표준의 가능한 적용에 대한 안내를 첨부서 B에서 제공한다. 첨부서 C와 D는 시멘트의 일반 사용 조건에서의 퍼포먼스와는 다른 페이스트 추출을 기반으로 한 다른 시험 절차에 대한 정보를 제공한다. 이러한 방법은 산화 과정을 포함하거나 포함하지 않을 수 있다. 이러한 방법을 사용하는 경우 참조 방법으로 분쟁이나 규제상한 미준수를 해결하는 것이 바람직하다. 첨부서 E는 일부 국가의 공장 내부 관리 시스템에서 사용되는 시멘트의 과잉 환원 제제 함유량을 결정하기 위한 방법에 대한 안내를 제공한다. 이 방법을 사용하는 제조업체는 참조 방법에 대한 테스트와 결과의 관련성을 보장해야 한다.

記事のタイトル:SIST EN 196-10:2016 - セメントの試験方法 - 第10部:セメント中の水溶性クロム(VI)の含有量の測定 記事の内容:このEN 196の一部は、セメント中の水溶性クロム(VI)の含有量を測定する方法を規定しています。 参照方法は、抽出手順とフィルター処理された抽出物の分析で構成されています。スクリーニングテスト、工場の製造管理またはその他の目的に適した他の抽出手順についてのガイダンスも提供されていますが、紛争や規制の制限を満たさない場合には、参照方法のみが使用されます。 参照方法には、フィルター処理された抽出物に酸化工程を行うかどうかを選択する代替方法があります。適切な手順を選択するための基準が設定されています。フィルター処理された抽出物の分析を参照方法を使用してキャリブレーションした他の測定器具の手順も使用できます。紛争の場合には、参照方法のみが使用されます。 付録Aでは、この試験方法がCE1907/2006規制の制限とセメントの適合性評価の基礎として使用される場合に従うべき手順が示されています。 この部分のEN 196は主にセメントに適用されますが、セメントを含む材料における水溶性クロム(VI)の含有量の測定におけるこの欧州規格の適用性については、付録Bでのガイダンスが提供されています。 付録CおよびDは、ペースト抽出に基づく他の試験手順に関する情報を提供し、通常の使用条件下でのセメントの性能とは異なる結果が得られる可能性があります。このような場合には、紛争や規制の制限には参照方法のみが使用されます。 付録Eでは、一部の国の工場内部管理システムで使用されるセメントの過剰還元剤含有量の測定方法についてのガイダンスが提供されています。この方法を使用する製造業者は、参照方法によるテストと結果の関連性を確認する必要があります。