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Analytical Sciences Digital Library (376 recursos)
The Analytical Sciences Digital Library, ASDL, is an NSF-funded digital library, accessed at www.asdlib.org, that collects, catalogs, links and publishes peer reviewed web-based discovery materials pertinent to innovations in curricular development and supporting technical resources in the analytical sciences.


Mostrando recursos 1 - 20 de 30

1. HPLC Simulator - Dwight Stoll
This java-based HPLC simulator provides an environment that allows practitioners and students of liquid chromatography to model changes in analyte retention based on changes in experimental conditions (e.g. flow rate, column length, solvent composition). Efficiency parameters, such as the theoretical plate height, number of theoretical plates, retention factors and peak resolution may either be calculated of obtained directly. The authors of this simulator have also incorporated the effect of experimental parameters (e.g. flow rate, column length, injection volume, temperature) on the speed and quality of the HPLC separation. Several problem sets for Instrumental Analysis or Introductory Analytical Chemistry courses are...

2. Isotope Distribution Calculator and Mass Spec Plotter - Scientific Instrument Services
Easy to use calculator for the isotopic distribution of a given chemical formula. Distributions can be plotted either for a formula, or user input of mass/intensity data. Either high or low mass resolution calculations can be performed. Simple program doing one task well.

3. Separation Science - Tom Wenzel
Designed as a faculty resource on separation science, the published materials are available to be used and modified to fit any curricular pedagogy. Materials include a text, sample problems, and laboratory exercises.

4. Reversed phase column characteristics and general chrom. overview - Waters
This is a link within the Waters HPLC Primer site. It contains very useful details regarding the properties of HPLC packing materials and how they impact performance. Since it is part of a larger site, it contains links to other information provided by waters on other aspects of HPLC as well as MS and other techniques. There is a higher level of detail in the instruction here than in most general sites discussing HPLC. Also, the site shows which Waters columns contain the different kinds of packing materials described, which would be helpful to a lot of people.

5. Animation of Light Paths Through a Fluorometer - TRSL
This animation site deals specifically with fluorescence detection for liquid chromatography. The animations are short (one to two minutes) and can easily be shown in class as part of a lecture. They are extremely helpful in illustrating key components and concepts of chromatographic systems. Users are encouraged to explore the site and the other brief animations as well. Separate links to other simulations by the same company (TRSL) are also listed on ASDL.

6. Electro-Optics Handbook - Burle
The Electro-Optics handbook is a 14 chapter reference text which addresses sources of radiation, including lasers, detection and detectors, photometric quantities, and geometric optics. Specific details can be found with the extensive appendix. The text is technical and lists equations without derivations.

7. Photodetectors and Fiber Optics - Ken Crozier
Power point slides to support a lecture on the principles and usage of photodiodes and optical fibers for sensors and instrumentation. There is no supporting text for the slides.

8. Scanning Tunneling Microscopy (STM) Video Lecture - Prof. R. Reifenberger
A video primer on STM by Prof. R. Reifenberger, Purdue University Nanotech Center. A thorough discussion of fundamentals followed by the technical barriers and implementations - excellent graphics illustrating principles and experimental results. Historical context is provided making presentation interesting. Should be viewed by anyone interested in surface analysis at atomic dimensions.

9. Introduction to Atomic Force Microscopy (AFM) Video Lecture - Prof. Arvind Raman
A video lecture on Atomic Force Microscopy (AFM) by Prof. Arvind Raman of Purdue University that discusses the historical development, instrumentation and operational principles of various AFM modes. The lecture is accompanied by power point slides with clear illustrative graphics. Basics are provided in the application examples with advantages and limitation discussed. Useful site to those interested in learning AFM.

10. Advanced Topic: Fluorescence Correlation Spectroscopy - Petra Schwille and Elke Haustein
Previously published as part of an online biophysics textbook, the article has rich and fairly complete scientific content.

11. Microscopy Primer - Olympus
This website is sponsored by Olympus company. It is similar to two other sites (one by Florida State University, the other by Nikon) already in asdlib whereby a common group of authors contributed to the development of all three sites. Thus, these sites are similar in content although differences exist. This Olympus site has a \"virtual microscopy\" that contains links to interacdtive tutorials that demonstrate the operation of different types of microscopes. Thus, one can compare how various types of microscopes work, play with controls, see how some settings can cause errors, etc. Optical microscopy per se is underutilized in...

12. Converting an Interferogram into a Spectrum by Fourier Transformation - Brian M. Tissue
An overview of the Fourier theorem as applied to analytical measurements is given. The Discrete Fourier Transform and the Fast Fourier Transform algorithms are mentioned, and sampling requirements are discussed. Links are provided to descriptions of Fourier transform based mass spectrometry, infrared spectroscopy and NMR techniques.

13. How an Interferogram is Produced - An Animated Explanation - Paul L. Edmiston
The site demonstrates principles behind the operation of the interferometer in an FTIR spectrometer. Graphics and interactive movies are used. Examples start from a single wavelength and build to the superposition of multiple wavelengths. The connection between an interferogram and a frequency domain spectrum is discussed.

14. A Biosensor for Fullerenes and Carbon Nanotubes - A. N. Kirschner, B. F. Erlanqer, S. R. Wilson
This site contains an article that describes the use of surface plasmon resonance (SPR) spectroscopy to monitor real-time protein binding with fullerenes and carbon nanotubes. The introductory section provides a brief description of SPR and how it works. It next talks about the features of the Texas Instrument\'s SPR, known as Speetra, which is a small self-contained apparatus for light measurements. It is followed by sections discussing the properties of fullerenes and carbon nanotubes, and the methods of surface binding with monoclonal antibodies. Experimental procedures are discussed followed by example results. An analysis and explanation of results in the concluding...

15. HPLC Primer - Waters Corporation
Nice introduction to high performance liquid chromatography that includes information on the modes of separation, a comparison of normal vs. reversed phase separations, identification of analytical, semi-prep, and preparative scale LC and a very nice large glossary that includes definitions of terms related to chromatography.

16. Mass Spectra of Fatty Acids - W.W.Christie
This website on lipid mass spectra presents a nice overview of the topic of mass spectrometric determination of fatty acids with gas chromatography-mass spectrometry and electron impact ionization sources (including derivatization). at a level that should be accessible to undergraduate analytical students. The site is easy to navigate. The material is well written and generously referenced.

17. Fluorescence Applications in Microscopy - EAMNET
The site contains a set of experimental and teaching modules that cover the fundamentals, history and practice of microscopy. Modules on microscopy, FRET, FRAP and Quantitative Multidimensional Microscopy will be of interest to chemists and biologists. Several include great graphics that would be helpful additions for instrumental analysis lectures.

18. Scanning Electrochemical Microscopy - Dr. David O. Wipf
A concise synopsis of scanning electrochemical microscopy (SECM) with an extensive bibliography. Excellent color graphics and short animations are used effectively to demonstrate the instrumental essentials, physical aspects, and operational modes of SECM.

19. Chem 212 - Separations Science - Thomas Wenzel
Superb website providing instructional materials in support of a problem-based learning approach to Quantitative Analysis (equilibria and separations). Materials available include textbook chapters, in-class, and out-of-class problems, a peer/peer evaluation tool, and a handout in support of a final course lab project report. The majority of materials are provided in an Adobe pdf format - very helpful for adoption by interested faculties.

20. Infrared Theory Tutorial and Guide to Analyzing an IR Spectrum
This site from CU Boulder provides two helpful resources: (1) A guide to interpreting FTIR spectra, with separate pages devoted to spectra signatures of important functional groups; and, (2) an infrared theory tutorial that discusses infrared radiation, common categories of vibrational modes, and Hookes Law.

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