BASIC ANALYTICAL PROCESS Flashcards
BASIC ANALYTICAL PROCESS
Select a method
Acquire the sample
Process the sample
[SELECT A METHOD]
Considerations:
- Level of Accuracy required
- Number of samples to be analyzed
- Complexity of sample and number of
components to be analyzed
- Level of Accuracy required
- Number of samples to be analyzed
- Complexity of sample and number of
components to be analyzed
Selecting a Method
The sample should be carefully identified and collected as to represent the entire bulk
material
[ACQUIRE THE SAMPLE]
[PROCESS THE SAMPLE]
- Preparing laboratory samples
- Defining replicate samples
- Preparing Solutions – perform physical or chemical changes
Types of Sample and Methods
ELiminating Interferences
Calibrating and Measuring Concentration of Property X
Calculating Results
Evaluating the results by Estimating reliability
– is a species that causes error by enhancing or attenuating the quantity being measured
Interferences
Selection of reagents or methods to be used that
minimize interferences should be done.
Selectivity
Selection of reagents or methods to be used that
minimize interferences should be done.
Selectivity
These computations are based on the raw data collected in the measurement step, the characteristics of the measurement.
[CALCULATING RESULTS]
The experimenter must provide some measure of the uncertainties associated with computed results if the data are to have any value
[EVALUATING THE RESULTS BY ESTIMATING RELIABILITY]
→ is the process of collecting a small mass of a material whose composition accurately represents the bulk of the material being sampled.
SAMPLING
It is the most difficult aspect of
analysis.
SAMPLING
“Samples are analyzed, but species or concentrations are _______”
determined
Analysis of ________ are
complicated because of the presence of sample matrix
real samples
