_RP_45-1998_2012.pdf

Recommended Practice for Analysis of Oilfield Waters RECOMMENDED PRACTICE 45 THIRD EDITION,AUGUST 1998REAFFIRMED,JANUARY 2012 Recommended Practice for Analysis of Oilfield Waters Exploration and Production DepartmentRECOMMENDED PRACTICE 45THIRD EDITION,AUGUST 1998REAFFIRMED,JANUARY 2012 SPECIAL NOTES API publications necessarily address problems of a general nature.With respect to partic-ular circumstances,local,state,and federal laws and regulations should be reviewed.API is not undertaking to meet the duties of employers,manufacturers,or suppliers towarn and properly train and equip their employees,and others exposed,concerning healthand safety risks and precautions,nor undertaking their obligations under local,state,or fed-eral laws.Information concerning safety and health risks and proper precautions with respect to par-ticular materials and conditions should be obtained from the employer,the manufacturer orsupplier of that material,or the material safety data sheet.Nothing contained in any API publication is to be construed as granting any right,byimplication or otherwise,for the manufacture,sale,or use of any method,apparatus,or prod-uct covered by letters patent.Neither should anything contained in the publication be con-strued as insuring anyone against liability for infringement of letters patent.Generally,API standards are reviewed and revised,reaffirmed,or withdrawn at least everyfive years.Sometimes a one-time extension of up to two years will be added to this reviewcycle.This publication will no longer be in effect five years after its publication date as anoperative API standard or,where an extension has been granted,upon republication.Statusof the publication can be ascertained from the API Exploration and Production Departmenttelephone(202)682-8000.A catalog of API publications and materials is published annu-ally and updated quarterly by API,1220 L Street,N.W.,Washington,D.C.20005.This document was produced under API standardization procedures that ensure appropri-ate notification and participation in the developmental process and is designated as an APIstandard.Questions concerning the interpretation of the content of this standard or com-ments and questions concerning the procedures under which this standard was developedshould be directed in writing to the director of the Exploration and Production Department,American Petroleum Institute,1220 L Street,N.W.,Washington,D.C.20005.Requests forpermission to reproduce or translate all or any part of the material published herein shouldalso be addressed to the director.API standards are published to facilitate the broad availability of proven,sound engineer-ing and operating practices.These standards are not intended to obviate the need for apply-ing sound engineering judgment regarding when and where these standards should beutilized.The formulation and publication of API standards is not intended in any way toinhibit anyone from using any other practices.Any manufacturer marking equipment or materials in conformance with the markingrequirements of an API standard is solely responsible for complying with all the applicablerequirements of that standard.API does not represent,warrant,or guarantee that such prod-ucts do in fact conform to the applicable API standard.All rights reserved.No part of this work may be reproduced,stored in a retrieval system,or transmitted by any means,electronic,mechanical,photocopying,recording,or otherwise,without prior written permission from the publisher.Contact the Publisher,API Publishing Services,1220 L Street,N.W.,Washington,D.C.20005.Copyright 1998 American Petroleum Institute FOREWORD These recommended practices were prepared by the API Subcommittee on Analysis ofOilfield Waters.This publication is under the administration of the American PetroleumInstitute Exploration and Production Departments Executive Committee on Drilling andProduction Operations.The first edition of RP 45,published as“Tentative”in November 1965,was developed bythe API Mid-Continent District Study Committee on Analysis of Oilfield Waters.Subse-quent to its publication,the Study Committee status was changed to a Subcommittee of theExecutive Committee on Drilling and Production Practices and charged with the responsibil-ity of continuing work in certain areas of interest to develop additional procedures for analy-sis of oilfield water analysis.The Second Edition,published in 1968 and reissued July 1981,contained revisions of,and additions to,First Edition procedures as well as a new section on“Spectroscopic Methods.”With the 1968 edition,this publication was advanced from a“Tentative”to a“Standard”Recommended Practice.This Third Edition supersedes andreplaces the Second Edition.Every effort has been made by API to assure the accuracy and reliability of informationcontained in this publication.However,API makes no representation,warranty,or guaranteein connection with publication of these recommended practices and hereby expressly dis-cl