SDG: Massspec a Flashcards
Overview
Introduction
Brief history of mass spectrometry
Desirable features of MS
Atomic/molecular masses and m/z ratio
3 types of mass
General applications
Physics
Chemistry
Environment
General applications
medicine
pharmacy
Basic principles of MS
4 basic steps
Basic Principles of MS
modular concept
A modular concept with unlimited capabilities
lets go shopping!
A modular concept with unlimited capabilities
how many combinations?
Some useful combinations for material science
Modular concepts – basic requirements
sample interface
ion source
Modular concepts – basic requirements
analyser
vacuum system
detection
Basic concepts of gasses and vacuum
Pressure Units and Ranges
Mean free path and gas flow regimes
equations
Mean free path and gas flow regimes
compare high and low pressures
Gas / solid interactions
equilibrium
adsorption
Gas / solid interactions
outgassing
impingement rate
sticking coefficient
Vacuum pumps - terminology
closed and open systems
requirements
Vacuum pumps - types
by the way they remove the gas
Vacuum pumps – working regime
Vacuum pumps – pump speed
Vacuum pumps – pump speed, conductance and throughput
Vacuum pumps - types
rough vs high vacuum
Vacuum pumps – rough pumps
Vacuum pumps – high vacuum pumps
cryogenic
Vacuum pumps – high vacuum pumps
turbomolecular
Total pressure measurement
Capacitance manometers
Thermocouple gauges
Pirani gauges
Ionization (high vacuum) gauges