A mathematical equation that relates Absorbance to the absorptivity, the length of the light path, and the concentration of a substance
What is Beer's Law
100
Emission technique in which an element in the sample is excited and the radiant energy given off is measured as the element returns to it's lowest energy level.
What is Atomic Absorption
Useful for: Al, Ca, Cu, Pb, Li, Mg, and Zn. All metals!!!
100
For measurements in the visible portion of the spectrum (usually a tungsten light bulb)
What is Light Source
100
380 - 750 nm
What is visible light?
200
concentration is directly proportional to
What is Absorbance
200
Occurs when a molecule absorbs light at one wavelength and re-emits light at a longer wavelength.
What is Fluorometry
200
Isolates a specific wavelength within a spectrophotometer
What is The Monochromator
200
The highest region of the electromagnetic spectrum that can be seen as thermal energy.
What is Infrared
300
the little "a" in A=abc equation is
Daily Double!
What is absorptivity
300
Emission of light when an electron returns from an excited level to a lower energy level.
What is Chemiluminescence
Part of Luminometry- a way to measure light emission
300
Small vessel used to hold liquid sample to be analyzed in the light path.
What is Cuvette
300
A characteristic of electromagnetic radiation; the distance between two wave crests
What is Wavelength
400
The curve plotted using % T and concentration
What is logarithmic
400
Measures intensity of instant beam of light as it passes through a solution of particles.
What is Turbidimetry
Light Scattering- Interaction of light with particles in solution
400
Devices that converts light into an electric signal that is proportional to the number of photons striking it's surface.
What is Detector
400
The lowest spectrum of the wavelength
What is ultra Violet
500
Given the absorbance value and calibration constant (K), the _________ can be calculated.
What is concentration.
#3- Beer's law is significant because it can be used to calculate concentrations of unknowns. It is the foundation for lab equipment and the results produced.
500
Detection of light energy scattered or reflected toward a detector that is not in the direct path of the transmitted light (usually at a right angle).
What is Nephelometry
500
A portion of the device that displays a reading based on the detector.
What is Meter
500
Terms used to describe the types of measurement of radiant energy (list 2 of 5)
What is emitted, transmitted, absorbed, scattered and reflected