Transcript Chemical Analyst vs Analytical Chemist

What is analytical chemistry?
• 5 subdisciplines of chemistry
• Some definitions
• In every day life…
• Analytical chemist versus chemical analyst
“My” steps
1.
2.
3.
Formulate the question
Select analytical
procedures
Sampling**
• “Representative” sample
• Homogeneous versus
heterogeneous
4.
Sample Preparation**
4.
• What type of analysis?
6.
Manipulate data
• Statistical analysis
7.
Interpret results/draw
conclusions
8.
Communicate results
Most analyses require a liquid
solution:
• Extraction
• Digestion
Analysis
Types of Analyses
1. Qualitative analysis
2. Quantitative analysis
3. Characterization analysis
4. Fundamental analysis
Some Terminology
• Analyte
• Matrix
• Analysis – Measurement – Determination
• Technique – Method – Procedure – Protocol
Classifying Techniques
• All analyses based on a signal
• Total Analysis Technique
– AKA “Classical Method”
• Concentration Technique
– AKA “Instrumental Method”
Method Considerations:
Analytical Figures of Merit (AFOMs)
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Accuracy
Precision
Sensitivity
Selectivity
Robustness
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Ruggedness
Scale of operation,
Analysis time
Availability of
equipment
• Cost
Relevant Reading
• Chpt 1 all
• Chpt 3 to 3C
• Chpt 2 (review)