• 2001
  • Klaus K. Unger studied chemistry at the Technical University of Darmstadt, Germany, where he also received his PhD. From 1977 to 2001 he was a professor in chemistry at the Johannes-Gutenberg University, Mainz, Germany, before heading a research group in bioseparations at Merck KGaA, Darmstadt, Germany, for eight years. (wiley.com)
  • involves
  • Solid-phase microextraction, or SPME, is a solid phase extraction sampling technique that involves the use of a fiber coated with an extracting phase, that can be a liquid (polymer) or a solid (sorbent), which extracts different kinds of analytes (including both volatile and non-volatile) from different kinds of media, that can be in liquid or gas phase. (wikipedia.org)
  • Module
  • As a result, ROCCET offers two different kinds of analytical modules - a univariate module and a multivariate module. (wikipedia.org)
  • In the multivariate module one can choose between three different techniques - SVM (support vector machine), PLS-DA (partial least squares discriminant analysis) and Random Forests for classifying and selecting metabolites or clinical variables for an optimal ROC performance. (wikipedia.org)
  • detection
  • These tools include small-molecule design, synthesis, derivatization, handling, and detection as well as advances in laboratory automation, robotics, and medicinal chemistry as applied to high-throughput screening (HTS). (stanford.edu)
  • Amperometry in chemistry is detection of ions in a solution based on electric current or changes in electric current. (wikipedia.org)
  • PAD is most often used for detection of carbohydrates after an anion exchange separation, but further development of related techniques show promise for amines, reduced sulfur species, and other electroactive compounds. (wikipedia.org)
  • Passive sampling techniques have been able to provide a time-integrated sample of water contamination with low detection limits and in situ extraction of analytes. (wikipedia.org)
  • ions
  • One of the drawbacks of the flowing afterglow technique is the possibility of generating multiple reactant ions. (wikipedia.org)
  • In supramolecular chemistry, host-guest chemistry describes complexes that are composed of two or more molecules or ions that are held together in unique structural relationships by forces other than those of full covalent bonds. (wikipedia.org)
  • analysis
  • While even the best analytical techniques cannot rectify problems generated by sloppy sample preparation, this less "sexy" step between the point at which analytes are transferred from the sample matrix to a form suitable for analysis is often overlooked. (spectroscopynow.com)
  • In 2002, Koichi Tanaka, a longstanding employee, won the Nobel Prize in Chemistry for developing a method of mass spectrometric analysis of biological macromolecules. (wikipedia.org)
  • Radioanalytical chemistry focuses on the analysis of sample for their radionuclide content. (wikipedia.org)
  • chemical
  • Various methods are employed to purify and identify the radioelement of interest through chemical methods and sample measurement techniques. (wikipedia.org)
  • Volume
  • 26th International Congress of Pure and Applied Chemistry, Volume 4: Organic Chemistry is a collection of session lectures presented at the 26th International Congress of Pure and Applied Chemistry, held in Tokyo, Japan on September 4-10, 1977.Thi. (tradebit.com)
  • Sample
  • books.google.com - The importance of accurate sample preparation techniques cannot be overstated--meticulous sample preparation is essential. (google.com)
  • Even the best analytical techniques cannot rectify problems generated by sloppy sample pretreatment. (google.com)
  • SFE can be used as a sample preparation step for analytical purposes, or on a larger scale to either strip unwanted material from a product (e.g. decaffeination) or collect a desired product (e.g. essential oils). (wikipedia.org)
  • Quantitative proteomics is an analytical chemistry technique for determining the amount of proteins in a sample. (wikipedia.org)
  • The flowing afterglow technique can be used to identify and quantify the volatile organic compounds (VOCs) of a sample as long as the fundamental ion chemistry is known. (wikipedia.org)
  • natural
  • Experimental and analytical studies for natural and synthetic samples under extreme conditions have advanced considerably in the past few years. (confex.com)
  • Japan
  • After studying chemistry at Kyoto University, Japan, Nobuo Tanaka carried out postdocs in the USA at Pennsylvania, Washington and Northeastern Universities, before returning to Kyoto at the Kyoto Institute of Technology (KIT). (wiley.com)
  • Digital
  • This signal is processed by a multichannel analyser (MCA) which produces an accumulating digital spectrum that can be processed to obtain analytical data. (wikipedia.org)
  • field
  • The field of radioanalytical chemistry was originally developed by Marie Curie with contributions by Ernest Rutherford and Frederick Soddy. (wikipedia.org)
  • typical
  • In a high school chemistry class, a typical use would be to show the presence of hydrogen (after electrolysis of water, or by reacting a metal with an acid). (wikipedia.org)
  • standard
  • This flowing afterglow technique replaced the then standard stationary afterglow when the movable Langmuir probe was introduced. (wikipedia.org)