Chemical Analysis Modern Instrumentation Methods and Techniques Second Edition Francis Rouessac and Annick Rouessac University of Le Mans, France Translated by Francis and Annick Rouessac and Steve Brooks Chemical Analysis Second Edition Chemical Analysis Modern Instrumentation Methods and Techniques Second Edition Francis Rouessac and Annick Rouessac University of Le Mans, France Translated by Francis and Annick Rouessac and Steve Brooks Englishlanguagetranslationcopyright© 2007byJohnWiley&SonsLtd, TheAtrium,SouthernGate,Chichester, WestSussexPO198SQ,England Telephone(+44)1243779777 Email(forordersandcustomerserviceenquiries):[email protected] VisitourHomePageonwww.wiley.com TranslatedintoEnglishbyFrancisandAnnickRouessacandSteveBrooks FirstPublishedinFrench© 1992Masson 2ndEdition© 1994Masson 3rdEdition© 1997Masson 4thEdition© 1998Dunod 5thEdition© 2000Dunod 6thEdition© 2004Dunod ThisworkhasbeenpublishedwiththehelpoftheFrenchMinistèredelaCulture-CentreNationalduLivre AllRightsReserved.Nopartofthispublicationmaybereproduced,storedinaretrievalsystemortransmittedinany formorbyanymeans,electronic,mechanical,photocopying,recording,scanningorotherwise,exceptunderthetermsof theCopyright,DesignsandPatentsAct1988orunderthetermsofalicenceissuedbytheCopyrightLicensingAgency Ltd,90TottenhamCourtRoad,LondonW1T4LP,UK,withoutthepermissioninwritingofthePublisher.Requeststo thePublishershouldbeaddressedtothePermissionsDepartment,JohnWiley&SonsLtd,TheAtrium,SouthernGate, Chichester,WestSussexPO198SQ,England,[email protected],orfaxedto(+44)1243770571. 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[Analysechimique.English] Chemicalanalysis:moderninstrumentationandmethodsandtechniques/FrancisRouessacandAnnick Rouessac;translatedbySteveBrooksandFrancisandAnnickRouessac.—2nded. p. cm. Includesbibliographicalreferencesandindex. ISBN978-0-470-85902-5(cloth:alk.paper)—ISBN978-0-470-85903-2(pbk.:alk.paper) 1. Instrumentalanalysis. I. Rouessac,Annick. II.Title. QD79.I5R68132007 543—dc22 2006036196 BritishLibraryCataloguinginPublicationData AcataloguerecordforthisbookisavailablefromtheBritishLibrary ISBN978-0-470-85902-5(HB) ISBN978-0-470-85903-2(PB) Typesetin101/2/121/2ptTimesbyIntegraSoftwareServicesPvt.Ltd,Pondicherry,India PrintedandboundinGreatBritainbyAntonyRoweLtd,Chippenham,Wiltshire Thisbookisprintedonacid-freepaperresponsiblymanufacturedfromsustainableforestry inwhichatleasttwotreesareplantedforeachoneusedforpaperproduction. Contents Foreword to the first English edition xiii Preface to the first English edition xv Preface to second edition xvii Acknowledgments xix Introduction xxi PART 1 SEPARATION METHODS 1 1 General aspects of chromatography 3 1.1 Generalconceptsofanalyticalchromatography 3 1.2 Thechromatogram 6 1.3 Gaussian-shapedelutionpeaks 7 1.4 Theplatetheory 9 1.5 Nernstpartitioncoefficient(K) 11 1.6 Columnefficiency 12 1.7 Retentionparameters 14 1.8 Separation(orselectivity)factorbetweentwo solutes 17 1.9 Resolutionfactorbetweentwopeaks 17 1.10 Theratetheoryofchromatography 19 1.11 Optimizationofachromatographicanalysis 22 1.12 Classificationofchromatographictechniques 24 Problems 27 2 Gas chromatography 31 2.1 ComponentsofaGCinstallation 31 2.2 Carriergasandflowregulation 33 2.3 Sampleintroductionandtheinjection chamber 34 2.4 Thermostaticallycontrolledoven 39 2.5 Columns 39 2.6 Stationaryphases 41 2.7 Principalgaschromatographicdetectors 46 2.8 Detectorsprovidingstructuraldata 50 2.9 Fastchromatography 52 2.10 Multi-dimensionalchromatography 53 2.11 Retentionindexesandstationaryphaseconstants 54 Problems 58 vi CONTENTS 3 High-performance liquid chromatography 63 3.1 ThebeginningsofHPLC 63 3.2 GeneralconceptofanHPLCsystem 64 3.3 Pumpsandgradientelution 65 3.4 Injectors 68 3.5 Columns 68 3.6 Stationaryphases 70 3.7 Chiralchromatography 75 3.8 Mobilephases 76 3.9 Paired-ionchromatography 78 3.10 Hydrophobicinteractionchromatography 80 3.11 Principaldetectors 80 3.12 EvolutionandapplicationsofHPLC 87 Problems 89 4 Ion chromatography 93 4.1 Basicsofionchromatography 93 4.2 Stationaryphases 96 4.3 Mobilephases 98 4.4 Conductivitydetectors 100 4.5 Ionsuppressors 101 4.6 Principleandbasicrelationship 104 4.7 Areasofthepeaksanddatatreatmentsoftware 105 4.8 Externalstandardmethod 105 4.9 Internalstandardmethod 107 4.10 Internalnormalizationmethod 110 Problems 112 5 Thin layer chromatography 117 5.1 PrincipleofTLC 117 5.2 CharacteristicsofTLC 120 5.3 Stationaryphases 121 5.4 Separationandretentionparameters 122 5.5 QuantitativeTLC 123 Problems 125 6 Supercritical fluid chromatography 127 6.1 Supercriticalfluids:areminder 127 6.2 Supercriticalfluidsasmobilephases 129 6.3 InstrumentationinSFC 130 6.4 ComparisonofSFCwithHPLCandGC 131 6.5 SFCinchromatographictechniques 133 7 Size exclusion chromatography 135 7.1 PrincipleofSEC 135 7.2 Stationaryandmobilephases 137 7.3 Calibrationcurves 138 7.4 Instrumentation 139 7.5 ApplicationsofSEC 140 Problems 143 CONTENTS vii 8 Capillary electrophoresis and electrochromatography 145 8.1 Fromzoneelectrophoresistocapillaryelectrophoresis 145 8.2 Electrophoreticmobilityandelectro-osmoticflow 148 8.3 Instrumentation 152 8.4 Electrophoretictechniques 155 8.5 PerformanceofCE 157 8.6 Capillaryelectrochromatography 159 Problems 161 PART 2 SPECTROSCOPIC METHODS 165 9 Ultraviolet and visible absorption spectroscopy 167 9.1 TheUV/Visspectralregionandtheoriginoftheabsorptions 167 9.2 TheUV/Visspectrum 169 9.3 Electronictransitionsoforganiccompounds 171 9.4 Chromophoregroups 173 9.5 Solventeffects:solvatochromism 174 9.6 Fieser–Woodwardrules 176 9.7 InstrumentationintheUV/Visible 178 9.8 UV/Visspectrophotometers 181 9.9 Quantitativeanalysis:lawsofmolecularabsorption 186 9.10 Methodsinquantitativeanalysis 190 9.11 Analysisofasingleanalyteandpuritycontrol 192 9.12 Multicomponentanalysis(MCA) 193 9.13 Methodsofbaselinecorrection 196 9.14 Relativeerrordistributionduetoinstruments 198 9.15 Derivativespectrometry 200 9.16 Visualcolorimetrybytransmissionorreflection 202 Problems 203 10 Infrared spectroscopy 207 10.1 Theoriginoflightabsorptionintheinfrared 207 10.2 Absorptionsintheinfrared 208 10.3 Rotational–vibrationalbandsinthemid-IR 208 10.4 Simplifiedmodelforvibrationalinteractions 210 10.5 Realcompounds 212 10.6 Characteristicbandsfororganiccompounds 212 10.7 Infraredspectrometersandanalysers 216 10.8 Sourcesanddetectorsusedinthemid-IR 221 10.9 Sampleanalysistechniques 225 10.10 Chemicalimagingspectroscopyinthe infrared 230 10.11 Archivingspectra 232 10.12 Comparisonofspectra 233 10.13 Quantitativeanalysis 234 Problems 238 viii CONTENTS 11 Fluorimetry and chemiluminescence 241 11.1 Fluorescenceandphosphorescence 241 11.2 Theoriginoffluorescence 243 11.3 Relationshipbetweenfluorescenceandconcentration 245 11.4 RayleighscatteringandRamanbands 247 11.5 Instrumentation 249 11.6 Applications 253 11.7 Time-resolvedfluorimetry 255 11.8 Chemiluminescence 256 Problems 259 12 X-ray fluorescence spectrometry 263 12.1 Basicprinciples 263 12.2 TheX-rayfluorescencespectrum 264 12.3 ExcitationmodesofelementsinX-rayfluorescence 266 12.4 DetectionofX-rays 271 12.5 Differenttypesofinstruments 273 12.6 Samplepreparation 277 12.7 X-rayabsorption–X-raydensimetry 278 12.8 QuantitativeanalysisbyX-rayfluorescence 279 12.9 ApplicationsofX-rayfluorescence 279 Problems 281 13 Atomic absorption and flame emission spectroscopy 285 13.1 Theeffectoftemperatureuponanelement 285 13.2 Applicationstomoderninstruments 288 13.3 Atomicabsorptionversusflameemission 288 13.4 MeasurementsbyAASorbyFES 290 13.5 BasicinstrumentationforAAS 291 13.6 Flamephotometers 297 13.7 Correctionofinterferingabsorptions 298 13.8 Physicalandchemicalinterferences 302 13.9 SensitivityanddetectionlimitsinAAS 304 Problems 305 14 Atomic emission spectroscopy 309 14.1 Opticalemissionspectroscopy(OES) 309 14.2 Principleofatomicemissionanalysis 310 14.3 Dissociationofthesampleintoatomsorions 311 14.4 Dispersivesystemsandspectrallines 315 14.5 Simultaneousandsequentialinstruments 317 14.6 Performances 321 14.7 ApplicationsofOES 323 Problems 324 15 Nuclear magnetic resonance spectroscopy 327 15.1 Generalintroduction 327 15.2 Spin/magneticfieldinteractionforanucleus 328 15.3 NucleithatcanbestudiedbyNMR 331
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