Atomic Emission Spectra Using a UV-Vis Spectrophotometer and an Optical Fiber Guided Light Source

Section: What Can It Do? Integration Of Uv–vis Spectrometers In the C...mentioning

confidence: 99%

UV–Visible Spectrometers: Versatile Instruments across the Chemistry Curriculum

Czegan

Hoover

2012

“…Two demonstrations have been published in which a class of students determines the wavelength of lines in atomic emission spectra (13,14). In addition, a number of exercises have been reported in which students perform qualitative or quantitative studies of spectra in the laboratory or on their own (15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28). Several articles specifically suggest using fiber-optic spectrophotometers to allow students to study emission and absorbance spectra (29,30).…”

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confidence: 99%

Simultaneous Display of Spectral Images and Graphs Using a Web Camera and Fiber-Optic Spectrophotometer

Niece

Lourigan

2006

“…The observation of emission from line and continuum sources provides much of the basis for our knowledge of electron energy levels in atoms and molecules. Emission spectroscopy has been studied in the undergraduate laboratory using spectrographs (1)(2)(3)(4)(5), spectroscopes (6)(7)(8), monochromators (9,10), and spectrophotometers (11)(12)(13)(14)(15). Many experiments use atomic hydrogen emission to study the electronic structure of an atom (4,(6)(7)(8)(11)(12)(13), while others use emission from various alkali metals (1-3, 10, 14).…”

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confidence: 99%

“…Many experiments use atomic hydrogen emission to study the electronic structure of an atom (4,(6)(7)(8)(11)(12)(13), while others use emission from various alkali metals (1-3, 10, 14). Minas da Piedade and Berberan-Santos designed an experimental setup that utilized an optical fiber to study many different light sources in a short lab session (15).…”

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confidence: 99%

Emission Spectroscopy in the Undergraduate Laboratory

Goode

Metz

2003

Simple lab experiments using an inexpensive, solid-state computerized spectrometer can help to introduce students to analytical emission spectroscopy. A series of experiments that employ an Ocean Optics spectrometer, a Windows PC, and a fiber optic pickup are described. Line spectra of mercury and hydrogen can be used for wavelength calibration and, in the case of hydrogen, used to determine the Rydberg constant and the spacing between the energy levels in hydrogen. Continuum sources include tungsten lamps and sunlight. Students can also examine mixed spectra; for example, the spectrum of a fluorescent light shows both line and continuum behavior as does the spectrum of a deuterium lamp. Molecular band emission is studied by obtaining the spectra of fireworks—our students used sparklers. The spectra of red, green, blue, and gold sparklers show both atomic lines and molecular bands. The wavelengths of the atomic lines, in conjunction with some basic reference tables, can be used to identify the composition of the sparkler; molecular bands are more difficult to assign, but are responsible for many of the colors observed. Bands arising from salts of barium, strontium, and copper are responsible for the green, red, and blue colors seen in commercially available sparklers.