Introduction to Analytical Chemistry Flashcards
Reveals the identity of the elements and compounds in a sample
Qualitative Analysis
Indicates the amount of each substance in a sample
Quantitative Analysis
The components of a sample that are determined
Analytes
Measures the volume of a solution containing sufficient reagent to react completely with the analyte
Volumetric Methods
Determine the mass of the analyte or some compounds related to it
Gravimetric Methods
Measures electrical properties such as potential, current, resistance, and quantity of electrical charge
Electroanalytical Methods
Explore the interaction between electromagnetic radiation and analyte atoms or molecules or the emission of radiation by the analytes
Spectroscopic Methods
Constituent parts can be distinguished visually or with the aid of a microscope
Heterogeneous
The process of determining how much of the given sample is material by its indicated name
Assay
The process of collection a small mass of a material whose composition accurately represents the bulk of the material being sampled
Sampling
Are portions of material of approximately the same size that are carried through an analytical procedure at the same time and in the same way
Replicate samples or replicates
A material, often an alkali metal salt, that is mixed with the sample that is heated to form a fused salt
Flux
A species that causes an error in analysis by enhancing or attenuating (making smaller) the quantity being measured. Species other than the analyte that affect final measurement
Interference or interferent
The process of determining the proportionality between analyte concentration and a measured quantity
Process of adjusting and verifying the accuracy of an analytical instrument or method by comparing its measurements to a known standard
Calibration
Collection of all components in the sample containing the analyte
Matrix or Sample matrix
Techniques or reactions that work for only one analyte
Specific technique
Techniques or reactions that apply to only a few analytes
Selective technique
Process of continuous measurement and control
Feedback system
Cycle of measurement, comparison, and control
Feedback loop
