Introduction to Modern Liquid Chromatography, Third Edition part 13 ppsx
Introduction to Modern Liquid Chromatography, Third Edition part 13 ppsx
... Snyder and J. J. Kirkland, Introduction to Modern Liquid Chromatography, 2nded., Wiley-Interscience, New York, 1979, pp. 34–36.46. Reviewer Guidance. Validation of Chromatographic Methods, Center ... Chromatogr. A, 1119 (2006) 140.22. J. C. Giddings, Dynamics of Chromatography, Part 1, Principles and Theory, Dekker,New York, 1965.23. G. Guiochon, in High-Performance Liquid Chromatography. ... W. Carr, in High Performance Liquid Chromatography,P.R.Brownand R. A. Hartwick, eds., Wiley-Interscience, New York, 1989, p. 1.25. J. H. Knox, in Advances in Chromatography, Vol. 38, P. R. Brown...
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Introduction to Modern Liquid Chromatography, Third Edition part 3 ppsx
... 624 13. 6 Separation of Carbohydrates, 625 13. 6.1 Hydrophilic Interaction Chromatography, 625 13. 6.2 Ion-Moderated Partition Chromatography, 626 13. 6.3 High-Performance Anion-Exchange Chromatography, ... Size-Exclusion Chromatography, 653 13. 10.3.2 Interactive Liquid Chromatography, 653 13. 10.3.3 Liquid Chromatography underCritical Conditions, 655 13. 10.3.4 Other Techniques, 655 13. 10.3.5 Chemical ... 597 13. 4.2.1 Column Selection, 599 13. 4.2.2 Mobile-Phase Selection, 601 13. 4.2.3 Chromatofocusing, 603 13. 4.2.4 Hydroxyapatite Chromatography, 604 13. 4.2.5 Immobilized-Metal AffinityChromatography...
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Introduction to Modern Liquid Chromatography, Third Edition part 34 ppsx
... in flow ratefrom 2.0 to 1.0 mL/min (not shown) results in an insignificant increase in resolution (to Rs= 1.2), while run time is doubled to 10 min. Alternatively, the particle sizecan be reduced, ... (called‘‘phase-optimized liquid chromatography’’ or POPLC®from Bischoff). Experimentswith individual columns define sample retention for each column type, and it is thenpossible to predict retention ... 35◦C; 2.0 mL/min. Chromatograms recreatedfrom data of [59].6.5 NONAQUEOUS REVERSED-PHASE CHROMATOGRAPHY (NARP) 295increased by lowering its temperature relative to that of the other column....
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Introduction to Modern Liquid Chromatography, Third Edition part 49 ppsx
... Section 9.2.2.5: (1) to clean the column betweensample injections, (2) to shorten run time, or (3) to improve separation by adjustingselectivity for different parts of the chromatogram. Because ... gradient time to 13 minutes, which then requires an increase infinal-%B to maintain k∗constant. As tG/Δφ = 31.6 for the ‘‘optimized’’ separationof Figure 9.18e, the new value of Δφ = 13/ 31.6 = ... that the sample may be too nonpolar for separation with the usualRPC conditions. In such cases an acetonitrile/buffer gradient can be replaced bya gradient from acetonitrile to a less-polar solvent...
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Introduction to Modern Liquid Chromatography, Third Edition part 63 ppsx
... Da); 49% acetonitrile-pH-2.3 buffer. Note the column-packing pore-diameter at topof each figure; ‘‘ligand coverage’’ (x-axis) is proportional to surface area. Adapted from [10]. 13. 3.1.2 Particle ... inflammatory responses, and their introduction into drug products destinedfor human use must be avoided. 13. 3.1.4 Recovery of Mass and Biological ActivityIn applications where HPLC is used to isolate ... surface of the particle (which represents < 1% of the total surface andcolumn capacity within the pores). In order to achieve adequate column capacity,retention, and column efficiency, particles...
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Introduction to Modern Liquid Chromatography, Third Edition part 66 ppsx
... (TED)NCOOMeONOH2OFigure 13. 20 Structure of two common IMAC ligands. Adapted from [55]. 13. 4 SEPARATION OF PEPTIDES AND PROTEINS 613 13.4.4 Hydrophilic Interaction Chromatography (HILIC)Water-soluble ... volatile, however, TFA is notoriousfor causing suppression in electrospray ionization [17]. 13. 4.4.3 Application of HILIC to Peptides and ProteinsHILIC has been used successfully to separate peptides, ... elution strategy is to bind proteins atpH values between 7 and 8, followed by elution with a step or gradient to pH valuesbetween 4 and 5, in order to convert histidine residues to the ionized form.An...
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Introduction to Modern Liquid Chromatography, Third Edition part 75 ppsx
... found to be powerful chiral selectors with complementaryenantioselectivity (different enantioselectivities and elution orders), leading to CSPsbased on vancomycin [111], teicoplanin [112], ristocetin ... antibiotic columns,exemplified by enantiomer separations of Z-Ala (top) and 5-methyl-5-phenylhydantoin(bottom). Experimental conditions: Ristocetin A, 20:80 methanol/0.1% triethylammoniumacetate buffer, ... commonly understood for the RP mode usingaqueous or hydro-organic mobile phases (acetonitrile-buffer or methanol-buffermixtures) that lipophilic solutes interact with CD selectors by inclusion...
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Introduction to Modern Liquid Chromatography, Third Edition part 84 ppsx
... asacetonitrile or acetone to a homogenized portion of a vegetable sample allows theextraction of pesticides into the solvent (step 2 of Fig. 16.7). Subsequent additionof salt (step 3) leads to ... extractors andthimbles are available for mg-size samples. The analyte concentration, the necessarymass to obtain a representative sample, and the chromatographic detector sensitivity,together ... the vessel to rise; extracted sample isremoved and transferred to a vial for further treatment(Section 16.8.2.3).Greatly increases speed of liquid solid extractionprocess; may be automated;extracted...
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Introduction to Modern Liquid Chromatography, Third Edition part 87 ppsx
... screwdriver or other metal tool, to avoid damaging the pump head. Donot use the piston to pry out the seal because the piston is likely to break. Asyou remove the seal, be sure to note how the seal ... sapphirepiston.• Inspect the piston for any scratches or defects. A simple way to highlight anyproblems is to hold a laser pointer up to the end of the piston, which willcause it to act as ... Clean the piston. Usually rinsing with alcohol and wiping the piston witha disposable laboratory wipe is sufficient to clean the piston. If a residueremains, sometimes polishing the piston with...
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Introduction to Modern Liquid Chromatography, Third Edition part 88 ppsx
... (arrow).counter to automatically record the number of injection cycles, so as to allow theremaining rotor seal life to be estimated. When viewed in cross section, the groovesof the rotor shown in ... split and distorted peaks inSection 17.4.5.3); otherwise, it may be necessary to replace the column.Before putting the system back into service, consider if steps need to be taken to prevent ... possible for air to leakinto the system through a loose low-pressure fitting (Section 17.4.1.1). If efforts to find a liquid leak are fruitless, tighten each of the low-pressure fittings to see ifthis...
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