Applied Spectroscopy: A Compact Reference for Practitioners by Jerry Workman Jr., Art Springsteen

By Jerry Workman Jr., Art Springsteen

This booklet delineates sensible, established, common equipment for ultraviolet, obvious, and infrared spectrometry in transparent language for amateur clients, and serves as a reference source for complicated spectroscopists. Applied Spectroscopy comprises very important details and equations with the intention to be talked about frequently. The ebook emphasizes reflectance and colour measurements because of their universal utilization in todays spectroscopic laboratories, and comprises tools for selectinga dimension strategy in addition to sun and colour measurements. Written by way of specialists within the box, this article covers spectrometry of latest fabrics, ceramics, and textiles, and offers an appendix of useful reference information for spectrometry.

  • Book themes include: Practical features of spectrometers and spectrometry; Sample preparation; Chemometrics and calibration practices; Reflectance measurements; Standard fabrics measurements
  • An emphasis is put on reflectance and colour measurements because of their universal utilization in present day spectroscopic laboratories
  • Methods for choosing a size approach are incorporated in addition to sunlight measurements and reference info on assets, detectors, optical fiber and window materials

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Also be cautious of the effect of any abrasive materials, retained in suspension, on optical window or crystal surfaces. This is particularly so for any system designed for continuous flow. Constant abrasion will result in light losses (due to light scattering) and eventually permanent damage to the optical surfaces. Emulsions containing water should be handled with either barium or calcium fluoride (or a comparable nonhygroscopic material) windows or with a ATR cell. Make sure that separation does not occur at the window or the IRE interface.

J;i . 1200 1300 1400 1500 FIG. 8. Predominant long-wavelength near-infrared (LW-NIR) hydrocarbon spectral features (showing absorbance as a function of wavelength). 47 2. U V - V I S - N I R S P E C T R O S C O P Y C-H, N-H, and O - H Stretch Absorption Bands for Specific LW-NIR (1100-2500 nm) Functional Groups (First and/or Second) Overtones) Structure ArCH (aromatics) C H - - C H (methylene) CH3 (methyl) R-OH (alcohols) ArOH (phenols) HOH (water) Starch Urea CONH 2 (primary amides) CONHR (Secondary amides) Cellulose Urea ArNH2 (aroamtic amines) NH (amines, general) Protein Urea Bond vibration C-H str.

29 30 30 33 34 34 35 35 36 36 37 37 37 37 37 38 38 39 39 40 42 44 45 47 I. Introduction Ultraviolet (UV; 190-380 nm), visible ((VIS; 380-750 nm), shortwave infrared (SW-NIR; 750-1100 nm), longwave near-infrared (LW-NIR; 2500 nm), infrared (2500 nm-400 c m - 1), a n d R a m a n the bulk of the electronic and vibrational 29 mode near1100- spectroscopy comprise measurement techniques. Copyright 9 1998by AcademicPress. All rights of reproductionin any formreserved. 00.

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