Card Set Information
What is the benefit of Dispersive IR that use double beam (null type)
The null type elminates the flucturation of the source and detector.
Compensates for the internal scattering or interference caused by the solvent
Which IR absorption spectroscopy is ideal for single gas quantitative analysis?
Name the reducing agent that is used in Mercury Cold Vapour AAS.
What are the limitations of AAS -> Atomic absorption Spectroscopy?
Elemental analysis only
Can only analyze one element at a time
When you want to do multiple elements, the lamp costs will add up
Lamps have life span - added cost to replace
Can take a long time (Graphite Furnace AAS)
What are the advantages of Atomic Absorption spectroscopy?
Trace elements analysis - high specificity, speed, high sensitivity (esp. Graphite Furnace AAS) & moderate equipment cost
Interferences are usually controllable
What are the benefits of AES-ICP?
Capable of determining most elements including non-metals down to ppb levels
wide detection range
relatively free from chemical interference
can determine 30+ elements at the same time
cost effective for multiple elements qualitative and quantitative analysis
What are the disadvatage of AES-ICP?
Operator requires special skill and training
high capital cost
computerized data processing may be required to correct spectral interferences