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Introduction:
The Huntington
University Chemistry Department’s collection of instrumentation
was enhanced when the new Science Hall was built in 2002.
Our instruments have been carefully chosen to be
student-operable and to represent a range of analyses
encountered in both industry and research. Chemistry
majors at Huntington have the advantage of being mentored in the
operation and maintenance of these instruments.
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The Varian Gemini
200 MHz nuclear magnetic resonance (NMR) spectrometer is a
research-grade instrument that allows students to solve structures of
molecules. Understanding how the instrument functions also allows
students to better comprehend the related technique of magnetic
resonance imaging (MRI) in medicine. |
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The Shimadzu
QP5000 gas chromatograph – mass spectrometer (GC-MS) is an
industrial-type instrument which allows students to separate, quantify,
and identify components of volatile mixtures with the aid of electronic
databases.
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The two Fourier
transform infrared spectrophotometers (FTIRs) (Bruker Vector 33 and
Mattson Galaxy 2020) allow students to identify molecules based on
“fingerprint” spectra that they generate when they absorb infrared
radiation. Accessories allow students to use the technique to identify
materials in many different forms including powders, gases, liquids,
fabrics, and adhesives.
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The three
UV-Visible spectrophotometers (Perkin Elmer Lambda 35, Lambda 3, and
Lambda 1) allow students to quantify the concentrations of colored
substances or substances that absorb UV radiation.
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Shown in the photo is one of our
smallest-sized instruments, an Ocean Optics fiber-optic
fluorimeter. |
The two
fluorimeters (Ocean Optics spectrofluorimeter and Turner filter
fluorimeter) use the very sensitive technique of fluorescence
spectroscopy to detect small quantities of fluorescent materials such as
chlorophyll or fluorescent biological molecules.
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The
SRI 8610C gas
chromatograph (GC) allows students to separate components of
mixtures with low boiling points. This modern workhorse instrument
allows students to practice their sample injection techniques and
“tinker” with the instrument.
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The Buck
Scientific Model 200 atomic absorption spectrophotometer (AA) allows
students to quantify the concentrations of metals in samples such as tap
water or industrial effluent by measuring the colors produced in a flame.
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The
EG&G 364
polarograph is a very sensitive instrument which allows students to
quantify the concentrations of metals and other substances by
electrochemical measurements. |
The
Varian 5000
high performance liquid chromatograph (HPLC) allows students to
separate and quantify components of non-volatile mixtures such as food
ingredients or pharmaceuticals.
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The Parr oxygen
combustion and solution calorimeters (Models 1341 and 1451) allow
students to quantify the heat released or absorbed in various
reactions, using a technique used in industry to measure
Calories in food items.
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The
Vernier
LabPro interfaces
are used in the introductory labs to allow
students to use the laboratory laptop computers to measure and graph
quantities such as temperature, pH, and voltage.
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The
Wavefunction
SpartanPro software allows students to use the laboratory laptop
computers to calculate and visualize properties of individual molecules
such as charge density, bond lengths, geometries, and vibrational
frequencies. |
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