hygiene1

Card Set Information

Author:
sentpar
ID:
110502
Filename:
hygiene1
Updated:
2011-10-20 02:22:35
Tags:
ih
Folders:

Description:
industrial hygiene
Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user sentpar on FreezingBlue Flashcards. What would you like to do?


  1. 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
  2. Which IR absorption spectroscopy is ideal for single gas quantitative analysis?
    IR non-dispersive
  3. Name the reducing agent that is used in Mercury Cold Vapour AAS.
    Stannous Chloride
  4. 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)
    • Destructive Technique
  5. 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
  6. 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
  7. 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

What would you like to do?

Home > Flashcards > Print Preview