Professor Bo Zhang
Luke Marney, Maxwell Zeigler
M W 12:30 - 1:20 PM, Bagley 260
W 1:30 2:20 PM, Bagley, Room 209, or by appointment
Lecture 12: Gas Chromatography
Martin and Synge (1952 Nobel Prize in Chemistry for their work on GC).
GC underwent much development in the 1970's.
GC is a powerful technique for the analysis of volatile substances.
Lecture 11: Liquid Chromatography
Mikhail S. Tswett first used LC column to separate leaf pigments in the early 1900s.
Lecture 13: Electrochemistry II
Electrochemical reaction rate
Current is an expression of the reaction rate:
Faradays Law: Q = nFN
rate(mol s cm )
i / mA
Lecture 12: Electrochemistry
What is electrochemistry?
Electrochemical processes are oxidation-reduction reactions in which:
the energy released by a spontaneous reaction is converted to electricity or
electrical energy is used to cause a nonspontaneous
Lecture 8: Mass Spectrometry
MW = 106
m/z = 106
m/z = 91
m/z = 77
What information can we get from MS spectrum?
Molecular weight, isotopes
Lecture 7: Atomic Spectroscopy
The wavelengths of absorbance and emission from atoms in the gas phase are characteristic
of atomic orbitals.
In the lowest energy transition, the spin of the electron is the same and it takes 589.0 n
Lecture 6: Fourier Transform Infared Spectrometry
Understanding an IR spectrum
Three vibrational modes in H2O
What is chemical separation?
One of the most important and time-consuming activities in chemistry. Involves isolating,
separating, and purifying chemical compounds.
The quality of the signal (data)
Indeterminate noise - random, irreproducible errors in measurement
1. small errors are more frequent than large errors
2. errors are distributed about mean value
3. can be treated easily by statistics
4. related to p
Lecture 5: Fluorescence Microscopy
CaSe quantum dots of different size
Prof. A. Weller
Partial energy-level diagram for a photoluminescent
Singlet excited states
Triplet excited states
Lecture 4: Absorption Instrument
Absorbance instrument - a common design
Signal processor and readout
A block diagram of an absorbance instrument
Light source - black