Download or read book High Performance Liquid Chromatography in Biochemistry written by Agnes Henschen and published by . This book was released on 1985 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Performance Liquid Chromatography written by Heinz Engelhardt and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern liquid column chromatography (LC) has developed rapidly since 1969 to become a standard method of separation. If the statisticians are to be believed, the recent growth of LC has been the most specta cular development in analytical chemistry and has not yet abated be cause its vast potential for application remains to be fully exploit ed. Significant factors contributing to this continued rise are the simplicity and low cost of the required basic equipment and the rela tive ease of acquiring and interpreting the data. Unfortunately, in LC, as so often in the field of analytical chemistry, the available commercial instruments are frequently far more complicated - and consequently far more expensive - than is nec essary for routine application. Therein also lies the risk of propa gating a "black box" philosophy that would be particularly detrimen tal to chromatography. Moreover, it appears to have been forgotten, as was done previously with gas chromatography, that inadequate sep aration by a column can be remedied only with great difficulty, if at all, by electronic means. Also, whether the capillary columns recent ly advocated with great enthusiasm for LC will fulfill the expecta tions of their proponents is highly questionable unless someone comes up with some new and revolutionary ideas.

Download or read book Instrumentation for High Performance Liquid Chromatography written by J.F.K. Huber and published by Elsevier. This book was released on 2011-09-22 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: Instrumentation for High Performance Liquid Chromatography

Download or read book Multidimensional Liquid Chromatography written by Steven A. Cohen and published by John Wiley & Sons. This book was released on 2008-05-09 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multidimensional Liquid Chromatography (MDLC) is a very powerful separation technique for analyzing exceptionally complex samples in one step. This authoritative reference presents a number of recent contributions that help define the current art and science of MDLC. Topics covered include instrumentation, theory, methods development, and applications of MDLC in the life sciences and in industrial chemistry. With the information to help you perform very difficult separations of complex samples, this reference includes chapters contributed by leading experts or teams of experts.

Download or read book Instrumental Liquid Chromatography written by and published by Elsevier. This book was released on 2011-09-22 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: Instrumental Liquid Chromatography

Download or read book The Second SeaWiFS HPLC Analysis Round Robin Experiment SeaHARRE 2 written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-15 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eight international laboratories specializing in the determination of marine pigment concentrations using high performance liquid chromatography (HPLC) were intercompared using in situ samples and a variety of laboratory standards. The field samples were collected primarily from eutrophic waters, although mesotrophic waters were also sampled to create a dynamic range in chlorophyll concentration spanning approximately two orders of magnitude (0.3 25.8 mg m-3). The intercomparisons were used to establish the following: a) the uncertainties in quantitating individual pigments and higher-order variables (sums, ratios, and indices); b) an evaluation of spectrophotometric versus HPLC uncertainties in the determination of total chlorophyll a; and c) the reduction in uncertainties as a result of applying quality assurance (QA) procedures associated with extraction, separation, injection, degradation, detection, calibration, and reporting (particularly limits of detection and quantitation). In addition, the remote sensing requirements for the in situ determination of total chlorophyll a were investigated to determine whether or not the average uncertainty for this measurement is being satisfied. The culmination of the activity was a validation of the round-robin methodology plus the development of the requirements for validating an individual HPLC method. The validation process includes the measurements required to initially demonstrate a pigment is validated, and the measurements that must be made during sample analysis to confirm a method remains validated. The so-called performance-based metrics developed here describe a set of thresholds for a variety of easily-measured parameters with a corresponding set of performance categories. The aggregate set of performance parameters and categories establish a) the overall performance capability of the method, and b) whether or not the capability is consistent with the required accuracy objectives. Goddard Space Flight Center

Download or read book Fast Liquid Chromatography Mass Spectrometry Methods in Food and Environmental Analysis written by Oscar Núñez and published by World Scientific Publishing Company Incorporated. This book was released on 2015 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a growing need for high-throughput separations in food and environmental research that are able to cope with the analysis of a large number of compounds in very complex matrices. Laboratories worldwide are now demanding fast and efficient analytical procedures with enough sensitivity, robustness, effectiveness and high resolution to be able to perform both qualitative and quantitative analysis while at the same time achieving cost-effective methodologies with reduced analysis times. Whereas the most common approach for solving many analytical problems has often been high-performance liquid chromatography (HPLC), the recent use of fast or ultra-fast chromatographic methods for environmental and food analysis has increased the overall sample throughput and laboratory efficiency without loss (and even with an improvement) in the resolution obtained by conventional HPLC systems.This book brings together researchers at the top of their field from across the world to discuss and analyze recent advances in fast liquid chromatography–mass spectrometry (LC–MS) methods for food and environmental analysis. It focuses on the development of the analytical method: sample preparation, chromatographic separation, mass spectrometry and, finally, confirmation and quantification aspects. These topics are addressed in three main parts. First, the most novel approaches to achieve fast and ultra-fast methods as well as the use of alternative and complementary stationary phases are described. In the second part, advances in fast LC–MS methods are addressed, focusing on novel treatment procedures coupled with LC–MS, new ionization sources, high-resolution mass spectrometry, and the problematic confirmation and quantification aspects in mass spectrometry. Finally, the third part is devoted to relevant LC–MS applications in food and environmental analysis and addresses the analysis of pesticides, mycotoxins, food packaging contaminants, perfluorinated compounds and polyphenolic compounds.This book brings together researchers working at the top of the field at universities and in industry from across the world to present the state-of-the-art in current research on food and environmental analysis. The scope of the book is intentionally broad and is aimed at worldwide analytical laboratories working in food and environmental applications as well as researchers in universities worldwide.