1Define AES
Atomic Emission Spectroscopy
2It is qualitative, quanititative, or both
Both
3Which interference is more common for AES
spectral
4Electrical sources for AES
spark, arc, and plasma
5Define plasma
a form of matter that contains a significant % (>1%) of electrons and ions in addition to neutral species and radicals
6Most common gas for plasma
Argon and Helium
7What is argon used for
ICP
8Types of plasma
ICP, DCP, and MP
9Why is plasma tehnique more important than the flame
plasma reaches higher temps, capable of detecting more elements
10What type of calibration is best for AES
external or method of standard addition
11Define MS
Mass spectrometry
12Define molecular ion peak
the ion obtained by the loss of electron from the molecule (M+)
13Define base peak
the most intense peak in the MS, assigned 100% intensity
14Define radical cation
positively charged species with an odd number of electrons
15Define fragment ions
lighter cations formed by the decomposition of the molecular ion
16Two types of ionization
electronic path ionization and chemical ionization
17What is a hard ionization process
Electronic path ionization
18What is a soft ionization process
Chemical ionization
19What are the 3 pieces to MS
1. Ion creation 2. Separation 3. Detector
20What do we need for MS
Ion source, mass spectrometry, and detector
21What does mass spec operate under
a vacuum
22Common gases used for chemical ionization
methane, ammonia, and isobutane
23What are the common gases used for chemcial ionization known as
reagent gases
24Types of detectors for MS
electron multiplier, faraday cup, and array detectors
25Calibration with standards
standard solutions, blank solution, corrected absorbance, linear regression
26Method of standard addition
known amount of analyte added directly to the sample
27Internal standard calibration
a known amount of a non-analyte element or compound added to all samples, blanks and standard solutions