Quantitative Analytical Chemistry

Chem 222Quantitative Analytical Chemistry... Lecture 1Introduction to Analytical Chemistry...  Why do we have to learn analytical chemistry? How important is analytical chemistry?. Wha

Chem 222

Quantitative Analytical Chemistry

 Text book:

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Study activities:

- Lecture

- Individual study

- Discussion, exercises, seminars in group (each group consists of

3-4 students)

- Homework: problem sets, will be sent by email

- Pop-up quizzes, Exams

Grading :

- Final exam: 60%

- Middle exam: 20%

- Homework, exercise, seminar, discussion, quizzes: 20%

Attention:

- Feel free to ask questions and correct teachers!!

- Keep silence in class, if somebody feels tired or bored, he or she can sleep or ask to go out!

Lecture 1

Introduction to Analytical Chemistry

 Why do we have to learn analytical chemistry?

 How important is analytical chemistry?

 What are we going to learn?

What’s analytical chemistry?

“Analytical chemistry is what analytical chemists do”

C.N.Reilly (1925-1981)

 Perform a chemical analysis

 Improve established analytical methods

 Extend existing analytical methods to new types of samples

 Develop new analytical methods for measuring chemical

phenomena

Example: The development of Ni2+ determination

 Gravimetry 2 days

 F-AAS few hours

 ICP-MS few minutes, don’t have to separate

from other metals

Classify analytical problems

Qualitative analysis:

what’s present?

Quantitave analysis: How much present?

Characterisation analysis

What are chemical and physical

properties? Fundamental analysis:

Improve method

Analytical problems

Main subject

•Chemical analysis includes any aspect of the chemical

characterization of a sample material.

Classify analytical techniques

Sa = kana ; Sa = kaCa

 Total analysis techniques

(chemical technique):

   Sa = kana

 Gravimetry; Titrimetry

 High precision, low

cost, long time, high concentration

 Concentration technique (instrumental technique):

 Sa = kaCa

 Spectroscopy;

electrochemistry (chromatography;

kinetic ).

short time, low concentration, (ppm, ppb )

signal Number of

moles Concentration

 If we want to measure

the concentration of As in drinking water, what are we going

to do?

Steps of an analysis process

Chap.8 Gravimetry

Chap 9 Titrimetry

Chap.10 Spectroscopic method

Chap.11 Electrochemical method

Chap.12 Chromatographic and

electrophoretic methods

Chap.13 Kinetic methods

-Instrumental methods: Surface and

structure charaterisation: NMR, AFM,

SEM, TEM, ; Thermal method: DTA,

DSC,

Chapter 7 Collect and

prepare sample

Chapter 3

Vocabulary of

analytical

chemistry

Chapter 5

Standardize analytical method

Chapter 4

Evaluate data