III. Comprehension

A. Read the text and answer the questions in your own words.

1. Why analytical chemistry is subdivided?

2. What do analytical and physical chemistry have in common?

3. Which methods are called classical? What are they?

4. What modern analytical techniques are mentioned in the article?

5. How new techniques might be helpful in the future?

B. Match the words with their definitions.

1. Sample A. an instrument used for doing special jobs

2. Overlap B. to take liquids

3. Tool C. as much as is needed for a purpose

4. Emit D. to cover partly and go beyond it

5. Absorb E. a small part representing the whole

6. Analyte F. of noticeable importance

7. Reagent G. chemical substance

8. Sufficient H. the measure of the amount of a substance in a liquid

9. Concentration I. to send out

10. Significant J. substance that shows the presence of another

substance in a compound

IV. Reading 2

A. Read the text and fill in the numbered gaps with suitable sentences A-E

A. The next step is sample preservation.

B. Once the sample preparation is complete, the analysis is carried out by an instrument of choice.

C. It could be the chemical or physical composition, structural or surface properties, or a sequence of proteins in genetic material.

D. The pesticides have to be extracted into a solution, which can be analyzed by an instrument.

E. It is obvious that an error in the first three steps cannot be rectifiedby even the most sophisticated analytical instrument.

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<== попередня сторінка	\|	наступна сторінка ==>
II. Reading1	\|	The measurement process

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