What is analytical chemistry 5 subdisciplines of chemistry

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** Most analyses require a liquid solution: • Extraction • Digestion 4. Analysis • What type of analysis? 6. Manipulate data • Statistical analysis 7. Interpret results/draw conclusions 8. Communicate results

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) • • • Accuracy Precision Sensitivity Selectivity Robustness Ruggedness Scale of operation, Analysis time Availability of equipment • Cost • •

Relevant Reading • Chpt 1 all • Chpt 3 to 3 C • Chpt 2 (review)