【BS英國(guó)標(biāo)準(zhǔn)】BS EN 939-2009 Chemicals used for treatment of water intended for human consumption — Hydrochloric acid.doc

british standardbs en 939:2009chemicals used fortreatment of water intended for human consumption hydrochloric acidics 13.060.20; 71.100.80no copying without bsi permission except as permitted by copyright lawbs en 939:2009national forewordthis british standard is the uk implementation of en 939:2009. it supersedes bs en 939:2000 which is withdrawn.the uk participation in its preparation was entrusted to technicalcommittee cii/59, chemicals for drinking water treatment.a list of organizations represented on this committee can be obtained on request to its secretary.this publication does not purport to include all the necessary provisions of a contract. users are responsible for its correct application.compliance with a british standard cannot confer immunity from legal obligations.this british standard was published under the authority of the standards policy and strategy committee on 30 june2009. bsi 2009isbn 978 0 580 58594 4amendments/corrigenda issued since publicationdate commentsbs en 939:2009european standard norme europenneeuropische normen 939january 2009ics 71.100.80supersedes en 939:1999english versionchemicals used for treatment of water intended for human consumption - hydrochloric acidproduits chimiques utiliss pour le traitement de leau destine la consommation humaine - acide chlorhydriqueprodukte zur aufbereitung von wasser fr den menschlichen gebrauch - salzsurethis european standard was approved by cen on 5 december 2008.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 cen management centre 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 cen management centre has the same status as the official versions.cen members are the national standards bodies of austria, belgium, bulgaria, 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 c om i t eur op en de nor m al i s ati on eur op i s c hes kom i tee f r nor m ung management centre: rue de stassart, 36 b-1050 brussels 2009 cenall rights of exploitation in any form and by any means reserved worldwide for cen national members.ref. no. en 939:2009: econtentspageforeword.3introduction .41scope .52normative references .53description .53.1identification.53.2commercial forms .63.3physical properties.63.4chemical properties .74purity criteria .84.1general.84.2composition of commercial product .84.3impurities and main by-products .84.4chemical parameters .95test methods.95.1sampling .95.2analysis .96labelling transportation storage . 166.1means of delivery. 166.2risk and safety labelling according to the ue directives . 166.3transportation regulations and labelling . 176.4marking . 176.5storage. 18annex a (informative) general information on hydrochloric acid . 19a.1origin . 19a.2use . 19a.3routine analyses . 20annex b (normative) general rules relating to safety. 21b.1rules for safe handling and use . 21b.2emergency procedures . 21annex c (normative) determination of arsenic, antimony and selenium (atomic absorption spectrometry hydride technique). 22c.1general principle. 22c.2interferences . 22c.3reagents . 22c.4apparatus . 24c.5procedure . 26c.6calculation. 27bibliography . 2827bs en 939:2009en 939:2009 (e)forewordthis document (en 939:2009) has been prepared by technical committee cen/tc 164 “water supply”, the secretariat of which is held by afnor.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 july 2009, and conflicting national standards shall be withdrawn at the latest by july 2009.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.this document supersedes en 939:1999.the significant technical differences between this edition and en 939:1999 are as follows:a) deletion of the reference to eu directive 80/778/eec of july, 15 1980 in order to take into account the latest directive in force (see 1);b) replacement of iso 5666-1 by en 1483. annex a is informative.annexes b and c are normative.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, 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.introductionin respect of potential adverse effects on the quality of water intended for human consumption, caused by the product covered by this european standard:a) this european standard provides no information as to whether the product may be used without restriction in any of the member states of the eu or efta;b) it should be noted that, while awaiting the adoption of verifiable european criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force.noteconformity with this european standard does not confer or imply acceptance or approval of the product in any of the member states of the eu or efta. the use of the product covered by this european standard is subject to regulation or control by national authorities.1scopethis european standard is applicable to hydrochloric acid used for treatment of water intended for human consumption. it describes the characteristics of hydrochloric acid and specifies the requirements and the corresponding test methods for hydrochloric acid. it gives information on its use in water treatment. it also determines the rules relating to safe handling and use of hydrochloric acid (see annex b).2normative referencesthe 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 1483, water quality - determination of mercury - method using atomic absorption spectrometry en iso 3696, water for analytical laboratory use specification and test methods (iso 3696:1987) iso 904, hydrochloric acid for industrial use determination of total acidity titrimetric method iso 3165, sampling of chemical products for industrial use safety in samplingiso 6206, chemical products for industrial use sampling vocabularyiso 6685, chemical products for industrial use general method for determination of iron content 1,10- phenanthroline spectorphotometric methodiso 8288:1986, water quality determination of cobalt, nickel, copper, zinc, cadmium and lead flame atomic absorption spectrometric methodsiso 9174, water quality determination of chromium atomic absorption spectrometric methods3description3.1identification3.1.1chemical namehydrochloric acid.3.1.2synonym or common namesmuriatic acid, hydrogen chloride.3.1.3relative molecular mass36,empirical formulahcl3.1.5chemical formulahcl3.1.6cas registry number 1)7647-01-einecs reference 2)231-595-7.3.2commercial formsthe product is supplied as aqueous solutions of hydrochloric acid with mass fraction of 25 % to 38 % (concentrated acid).dilutions of these solutions are also available.3.3physical properties3.3.1appearancethe solution is colourless to yellow and slightly fuming to strongly fuming, depending on concentration.3.3.2densitythe density is between 1,135 g/ml and 1,185 g/ml at 20 c, depending on concentration.3.3.3solubilitythe product is miscible with water in any proportion.3.3.4vapour pressurethe vapour pressure for hcl at mass fraction 30 % depending on temperature is given in table 1.table 1 vapour pressure of hydrochloric acid solutionstemperaturecp totalkpap hclkpap h2okpa20502,1313,731,419,460,724,271 ) chemical abstracts service registry number2 ) european inventory of existing commercial chemical substances3.3.5boiling point at 100 kpathe boiling point of hcl depending on concentration is given in table 2.table 2 boiling point of hydrochloric acid solutionsconcentrationmass fraction in %boiling point at 100 kpa ac2510430903850,5a 100 kpa = 1 bar3.3.6melting or freezing pointthe melting or freezing point of hcl depending on concentration is given in table 3.table 3 melting or freezing pointconcentrationmass fraction in %melting or freezing pointc38- 2725- 753.3.7specific heat3,14 kj/(kg . k) at 18 c for hcl at mass fraction 16,83 %.3.3.8viscosity (dynamic)the viscosity of a hcl at mass fraction 30 %, solution at 15 c, is 1,9 mpa.s.3.3.9critical temperaturenot applicable.3.3.10 critical pressurenot applicable.3.3.11 physical hardnessnot applicable.3.4chemical propertiesthe solution of hydrochloric acid is a strong mineral acid.4purity criteria4.1generalthis european standard specifies the minimum purity requirements for hydrochloric acid used for the treatment of water intended for human consumption. limits are given for impurities commonly present in the product. depending on the raw material and the manufacturing process other impurities may be present and, if so, this shall be notified to the user and when necessary to relevant authorities.noteusers of this product should check the national regulations in order to clarify whether it is of appropriate purity for treatment of water intended for human consumption, taking into account raw water quality, required dosage, contents of other impurities and additives used in the product not stated in this product standard.limits have been given for impurities and chemical parameters where these are likely to be present in significant quantities from the current production process and raw materials. if the production process or raw materials leads to significant quantities of impurities, by-products or additives being present, this shall be notified to the user.4.2composition of commercial productas concentrated acid the concentration of hcl solution shall be at least at mass fraction of 25 %.more diluted solutions are commercially available; the concentration of hydrochloric acid shall be equal to or greater than the manufacturer specified value.4.3impurities and main by-productsthe product shall conform to the requirements specified in table 4.table 4 impuritiesimpuritylimit mg/kg of hclmass fraction 100 %iron (fe)max.170halogenated organiccompounds (as cl)max.174.4chemical parametersthe product shall conform to the requirements specified in table 5.table 5 chemical parametersparameterlimit in mg/kg of hcl mass fraction 100 %type 1type 2arsenic (as)max. cadmium (cd)max. chromium (cr)max. mercury (hg)max. nickel (ni)max. lead (pb)max. antimony (sb)max.selenium (se)max.3130,5331510510310201010notepesticides and polycyclic aromatic hydrocarbons are not relevant in hcl. cyanide which does not exist in a very acidic media, such as hydrochloric acid, is not a relevant chemical parameter. for parametric values of hydrochloric acid on trace metal content in drinking water, see 1.5test methods5.1samplingobserve the general recommendations of iso 3165 and take account of iso 6206.5.2analysis5.2.1determination of hydrochloric acid content (main product)the determination of total acidity is carried out by titration in accordance with iso 90impuritiesdetermination of iron content.1preparation of the test solutionin accordance with iso 66.1.2procedurein accordance with iso 66.2determination of content of halogenated organic compounds.1generalhalogenated organic compounds are determined as the extractabl