Frans_M_Everaerts_Isotachophoresis_378342.pdf

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AMINO ACIDS 8- ?- 6- 5- 4- 3- 2- f- I 20 5.c Fig.13.1. Isotachopherogram of the separation of a mixture of amino acids obtakled with the operational system listed in Table 13.3. 1 = Chloride; 2 = Asp; 3 = Cys; 4 = I,-Tyr; 5 = Asn; 6 = Ser; 7 = Tyr; 8 = Gly; 9 = Trp; 10 = Ile; 11 = P-Ala. All are L-amino acids. R = Increasing resistance; A = increasing UV absorption; t = time. 1" 315
316 AMINO ACIDS, PEPTIDES AND PROTEINS TABLE 13.4 STEP HEIGHTS (mm) FOUND IN THE LINEAR TRACE OF THE CONDUCTIVITY DETECTOR SIGNAL IN THE ISOTACHOPHEROGRAMS OBTAINED WITH THE OPERATIONAL SYSTEM LISTED IN TABLE 13.2. Amino PH acid L-Asp L-cys L-Glu I, -L-Tyr L-Ser L-Thr DL-Tyr DL-Met Gly L-His L-Phe L-Ma L-Val L-Trp 3-L-Hyp L-Ile L-Leu P-Ala 9.00 9.20 9.36 9.55 40.5 51.5 49.5 76 112.5 113 135 133 138.5 145 147.5 180 184 191 185 203.5 205 239 33 39.5 40 63 88 98.5 114.5 116 119 124 127.5 154 159 161.5 162 172.5 172.5 210 30.5 35.5 34 59 84 90 107 112.5 106 118 121 147 151 157 151 162.5 164.5 20 1 38.5 34.5 35.5 58 85 94.5 105 117.5 110.5 123 126.5 149 155 161 154 167 170 190 The results obtained when using the operational systems specified in Tables 13.2 and 13.3 are given in Tables 13.4 and 13.5. Differences in step heights of about 15-20 mm are sufficient for a complete separation of the various amino acids. The differences found in the two operational systems considered must be ascribed mainly to the difference in effective mobility of the counter ion used. While in the operational system specified in Table 13.2 about eight amino acids can be separated in a single run, in that specified in Table 13.3 about ten amino acids can be separated simultaneously. L-Lysine has a very small effective mobility at the pH of the leading electrolyte chosen, while the effective mobility of ethanolamine is considerably greater. The idea that pure water, adjusted to a high pH by adding barium hydroxide, can be used as an optimal terminating electrolyte in operational systems at high pH is nearly always wrong. If double-distilled water adjusted to a high pH is applied as the terminating electrolyte*, one can expect the buffer capacity of the counter ion to be insufficient. If, instead, a suitable terminator, e.g., p-alanine, is added to the water, also adjusted to a high pH, the pH of the zone of the terminating electrolyte does not need to be increased so *OH- may carry the electricity because the pH in the zone is increased sufficiently as water is a weak acid in this electrolytic system. This, in combination with the high absolute mobility, will give OH- a sufficient high effective mobility.
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Journal of Chromatogaphy Library -
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Journal of Chromatography Library -
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Dedicated to Pr0f.Dr.h. A.I.M. Keul
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Contents Preface ..................
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CONTENTS IX 6.4.2. The d.c. method
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CONTENTS XI 12.2.2. Applications ..
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It is very well known that charged
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Chapter 1 Historical review SUMMARY
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HISTORICAL REVIEW 3 Independently i
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THEORY
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Chapter 2 Principles of electrophor
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MOVINGBOUNDARY ELECTROPHORESIS a S
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MOVINGBOUNDARY ELECTROPHORESIS 0 iu
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ISOTACHOPHORESIS 13 2.4. PRINCIPLE
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ISOTACHOPHORESIS 15 As the anionic
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ISOTACHOPHORESIS velocities, so tha
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ISOTACHOPHORESIS 19 d.t ’.t I Fig
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ISOTACHOPHORESIS 21 t Fig.2.8. Isot
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ISOELECTRIC FOCUSING 23 The four is
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DISCUSSION 25 Fig.2.11. Survey of t
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Chapter 3 Concept of mobility SUMMA
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IONIC MOBILITY AND IONIC EQUIVALENT
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EFFECTIVE IONIC MOBILITY 31 obtain
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EFFECTIVE IONIC MOBILITY 33 compari
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EFFECTIVE IONIC MOBILITY Fig.3.4. R
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DETERMINATION OF IONIC MOBILITIES 3
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DETERMINATION OF IONIC MOBILITIES 3
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Chapter 4 Mathematical model for is
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GENERAL EQUATIONS 43 anionic specie
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GENERAL EQUATIONS 4.2.1. Equilibriu
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GENERAL EQUATIONS 41 i Similar equa
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GENERAL EQUATIONS 49 Uthzone (U-llt
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GENERAL EQUATIONS 4.2.4. Modified O
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GENERAL EQUATIONS TABLE 4.2 REDUCED
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MATHEMATICAL MODEL FOR THE STEADY S
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VALIDITY OF THE ISOTACHOPHORETIC MO
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CHECK OF THE ISOTACHOPHORETIC MODEL
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CHECK OF THE ISOTACHOPHORETIC MODEL
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REFERENCES 81 Fig.4.17. Relationshi
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Chapter 5 Choice of electrolyte sys
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CHOICE OF THE SOLVENT 85 In general
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CHOICE OF THE SOLVENT TABLE 5.2 THE
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CHOICE OF THE SOLVENT pH and pKvalu
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CHOICE OF THE SOLVENT 91 TABLE 5.4
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CHOICE OF THE pH OF THE LEADING ELE
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CHOICE OF THE pH OF THE LEADING ELE
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CHOICE OF THE TERMINATING AND LEADI
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ADDITIONS TO THE ELECTROLYTE SOLUTI
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EXAMPLES Choice of solvent. Can wat
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EXAMPLES 103 solvent, hoping that a
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EXAMPLES TABLE 5.11 STEP HEIGHTS OF
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EXAMPLES TABLE 5.12 STEP HEIGHTS OF
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Fig.5.9. Isotachopherograms of the
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EXAMPLES II 4 3 Fig.5.11. Isotachop
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REFERENCES 113 Example I. As exampl
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INSTRUMENTATION
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Chapter 6 Detection systems SUMMARY
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THERMOMETRIC RECORDING 6.1.3. Combi
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THERMOMETRIC RECORDING Potential gr
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THERMOMETRIC RECORDING /2 Fig.6.1.
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THERMOMETRIC RECORDING T t l Fig.6.
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THERMOMETRIC RECORDING 7 127 It-- I
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THERMOMETRIC RECORDING a concentrat
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HIGH-FREQUENCY CONDUCTIVITY DETECTI
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CONDUCTIVITY DETECTION 133 Fig.6.9.
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CONDUCTIVITY DETECTION 135 The d.c.
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CONDUCTIVITY DETECTION 137 Hi V 1kR
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CONDUCTIVITY DETECTION Fig.6.12. Co
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CONDUCTIVITY DETECTION Fig.6.14. Th
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CONDUCTIVITY DETECTION 143 6.4.4. T
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CONDUCTIVITY DETECTION 145 contact
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CONDUCTIVITY DETECTION 147 We can n
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CONDUCTIVITY DETECTION 149 N.Y., U.
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CONDUCTIVITY DETECTION 151 achieved
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UV ABSORPTION METER 153 -_-.- +- R
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UV ABSORPTION METER Fig.6.22. Contr
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W ABSORPTION METER r +15V -15V Mod
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W ABSORPTION METER 159 TABLE 6.4 PR
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W ABSORPTION METER 230 240 2% m zm
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to Mod (Fig 6.24) oscillator I sync
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UV ABSORPTION METER 165 dicular to
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Fig.6.31. Isotachopherograms for th
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UV ABSORPTION METER 169 50 Fig.6.33
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ADDITIVES TO THE ELECTROLYTES 171 6
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ADDITIVES TO THE ELECTROLYTES 173 e
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ADDITIVES TO THE ELECTROLYTES 175 a
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ADDITIVES TO THE ELECTROLYTES 177 o
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ADDITIVES TO THE ELECTROLYTES 179 d
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ADDITIVES TO THE ELECTROLYTES 181 T
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ADDITIVES TO THE ELECTROLYTES Fig.6
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ADDITIVES TO THE ELECTROLYTES 185 F
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ADDITIVES TO THE ELECTROLYTES 1 2 3
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ADDITIVES TO THE ELECTROLYTES 189 n
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COATING OF THE MICRO-SENSING ELECTR
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DETECTION LIMITS 193 electric drivi
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DETECTION LIMITS 195 Fig.6.48. Infl
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DETECTION LIMITS 197 TABLE 6.6 SURV
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CONCLUSION 199 average length of a
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REFERENCES 201 seen. Again it is cl
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Chapter 7 Instrumentation SUMMARY T
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INJECTION SYSTEMS I! I n Fig.7.1. P
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INJECTION SYSTEMS Fig.7.3. Exploded
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INJECTION SYSTEMS Fig.7.5. Injectio
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COUNTER ELECTRODE COMPARTMENTS 21 1
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COUNTER ELECTRODE COMPARTMENTS Even
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COUNTER ELECTRODE COMPARTMENTS 21 5
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EQUIPMENT the large bore, a more di
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EQUIPMENT 219 belonging to three cl
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EQUIPMENT 221 signal of the thermoc
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EQUIF'MENT 223 No effect on the res
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EQUIPMENT 225 Fig.7.14. Electrophor
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EQUIPMENT Fig.7.16. Photograph of t
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EQUIPMENT 229 mounted equiplanar, w
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COUNTER FLOW OF ELECTROLYTE 231 ins
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COUNTER FLOW OF ELECTROLYTE p High
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COUNTER FLOW OF ELECTROLYTE Fig.7.2
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COUNTER FLOW OF ELECTROLYTE 231 aro
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COUNTER FLOW OF ELECTROLYTE p high
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COUNTER FLOW OF ELECTROLYTE 24 1 7.
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COUNTER FLOW OF ELECTROLYTE I I 31
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COUNTER FLOW OF ELECTROLYTE max. 15
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APPLICATIONS
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Chapter 8 Introduction SUMMARY In t
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INTRODUCTION 25 1 the various ionic
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Chapter 9 Practical aspects SUMMARY
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DISTURBANCES CAUSED BY H+ AND OH 25
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DISTURBANCES CAUSED BY H+ AND OH- 2
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DISTURBANCES DUE TO CO, 263 Electro
Page 280 and 281: ENFORCED ISOTACHOPHORESIS 265 t T T
Page 282 and 283: WATER AS TERMINATOR 267 function of
Page 284 and 285: PURIFICATION OF THE TERMINATOR 7 4
Page 286 and 287: REFERENCES 271 AS an example, the c
Page 288 and 289: Chapter 10 Quantitative aspects SUM
Page 290 and 291: THERMOMETRIC MEASUREMENTS 215 vj c
Page 292 and 293: THERMOMETRIC MEASUREMENTS TABLE 10.
Page 294 and 295: CONDUCTIMETRIC MEASUREMENTS factor
Page 296 and 297: CONCLUSION 28 1 Tables 10.3-10.5 wa
Page 298 and 299: Chapter 11 Separation of cationic s
Page 300 and 301: SEPARATION USING A THERMOCOUPLE AS
Page 306 and 307: I SEPARATION USING A THERMOCOUPLE A
Page 308 and 309: SEPARATION USING CONDUCTIVITY AND U
Page 310 and 311: Chapter I2 Separation of anionic sp
Page 312 and 313: SEPARATION USING A THERMOMETRIC DET
Page 316 and 317: SEPARATION USING CONDUCTIVITY AND W
Page 326 and 327: Chapter 13 Amino acids, peptides an
Page 328 and 329: AMINO ACIDS TABLE 13.1 OPERATIONAL
Page 332 and 333: AMINO ACIDS 317 TABLE 13.5 STEP HEI
Page 334 and 335: AMINO ACIDS Fig.13.3. Schematic dia
Page 336 and 337: AMINO ACIDS TABLE 13.6 DETERMINATIO
Page 338 and 339: SEPARATION OF PROTEINS IN AMPHOLYTE
Page 350 and 351: SEPARATION OF SMALL PEPTIDES reprod
Page 352 and 353: Chapter I4 Separation of nucleotide
Page 362 and 363: Chapter 15 Enzymatic reactions SUMM
Page 364 and 365: ENZYMATIC CONVERSION OF GLUCOSE (FR
Page 370 and 371: ENZYMATIC CONVERSION OF PYRUVATE 35
Page 376 and 377: Chapter 16 Separations in non-aqueo
Page 378 and 379: SEPARATION OF ANIONIC SPECIES IN ME
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SEPARATION OF CATIONIC SPECIES IN M
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EXPERIMENTS IN AQUEOUS METHANOLIC S
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Chapter I7 Counter flow of electrol
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INTRODUCTION 317 In various operati
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EXPERIMENTAL 0% 10 % a b 60 % a b a
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EXPERIMENTAL 381 caused by the coun
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CONCLUSION 383 c t r ’r; I I"
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APPENDICES
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Appendix A Simplified model of movi
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PROCEDURE OF COMPUTATION A.3. PROCE
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EXPERIMENTAL 39 1 TABLE A1 THEORETI
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DISCUSSION E I I Fig.A2. Graphical
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Appendix B Diameter of the narrow-b
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Appendix C Literature 1897-1966 F.
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LITERATURE 399 B.P. Konstantinov an
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LITERATURE 401 1971 L. Arlinger, Is
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LITERATURE 403 1973 L. Arlinger and
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LITERATURE 405 A. Chrambach and J.S
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LITERATURE 407 M. Coxon and M.J. Bi
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Symbols and abbreviations SYMBOLS A
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SYMBOLS AND ABBREVIATIONS SUPERSCRI
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Subject index A Absorption meter, U
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SUBJECT INDEX 41 5 Detection limit
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SUBJECT INDEX 41 7 --_ , separation
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