The Analytical Process
Chapter 0
,General Steps in Chemical Analysis
1. Formulate the question.
2. Select the analytical procedure.
3. Sample.
4. Prepare the sample.
5. Analyze.
6. Report and interpret.
7. Draw conclusions.
,Quantitative vs. Qualitative
Quantitative Chemical Analysis
Measurement of how much of a chemical substance is present
• Analysis provides a numeric answer
Qualitative Chemical Analysis
Identification of what chemical constituents are present in a substance
• For example, “Is the patient pregnant?”
• Test confirms identity of compound (that is, hormone is present, yes/n
, The Analytical Chemist’s Job
How does a chemist measure the caffeine content of a chocolate ba
The Chemical Abstracts is t
• Start by reading the literature comprehensive source for l
articles published in chemis
• Review methods used by other scientists journals. SciFinder is softwa
by searching the Chemical Abstracts accesses the Chemical Abst
Chapter 0
,General Steps in Chemical Analysis
1. Formulate the question.
2. Select the analytical procedure.
3. Sample.
4. Prepare the sample.
5. Analyze.
6. Report and interpret.
7. Draw conclusions.
,Quantitative vs. Qualitative
Quantitative Chemical Analysis
Measurement of how much of a chemical substance is present
• Analysis provides a numeric answer
Qualitative Chemical Analysis
Identification of what chemical constituents are present in a substance
• For example, “Is the patient pregnant?”
• Test confirms identity of compound (that is, hormone is present, yes/n
, The Analytical Chemist’s Job
How does a chemist measure the caffeine content of a chocolate ba
The Chemical Abstracts is t
• Start by reading the literature comprehensive source for l
articles published in chemis
• Review methods used by other scientists journals. SciFinder is softwa
by searching the Chemical Abstracts accesses the Chemical Abst
