Intro to AnaChem Lec Flashcards
The science obtaining, processing, and communicating information about the composition and structure of matter
analytical chemistry
type of analysis that reveals chemical identity of elements and compounds in a sample
qualitative analysis
determines the relative amounts of each substance in a sample
quantitative analysis
4 general areas of analytical methods
Gravimetric
volumetric
electroanalytical
spectroscopic
GraVES
area of analytical method
determines the mass of analyte
gravimetric
area of analytical method
uses the volume of a solution containing sufficient reagent to react with the analyte
volumetric
area of analytical method
measures electrical properties to find composition of samples
electroanalytical
area of analytical method
based on interaction of electromagnetic radiation with analyte atoms & molecules, or on the production of radiation by analytes
spectroscopic methods
Steps in quantitative analysis
- picking a method
- Acquiring the sample
- processing the sample
- eliminating interfereces
- calibration and measurement
- calculating the results
- evaluating results by estimating their reliability
solution or mixture with constituent parts that can be distinguished visually or with the aid of a microscope
heterogenous
the process of determining how much of a given sample is the material indicated by its name
assay
portions of a material of approximately the same size that are carried through an analytical procedure at the same time and way
replicate samples
improves the quality of results and provides a measure of their reliability
replication
species other than the analyte that affect the final measurement are called
interferences or interferents
species that causes an error in an analysis by enhancing or attenuating the quantity being measured
interference
