Collection and Processing of Samples

Code:

Q330

Acronym:

Q330

Keywords
Classification	Keyword
OFICIAL	Chemistry

Instance: 2011/2012 - 2S

Active?	Yes
Responsible unit:	Department of Chemistry and Biochemistry
Course/CS Responsible:	Bachelor in Physics

Cycles of Study/Courses

Acronym	No. of Students	Study Plan	Curricular Years	Credits UCN	Credits ECTS	Contact hours	Total Time
L:AST	1	Plano de Estudos a partir de 2008	3	-	5	-
L:B	1	Plano de estudos a partir de 2008	3	-	5	-
L:CC	0	Plano de estudos de 2008 até 2013/14	3	-	5	-
L:F	1	Plano de estudos a partir de 2008	3	-	5	-
L:G	0	P.E - estudantes com 1ª matricula anterior a 09/10	3	-	5	-
		P.E - estudantes com 1ª matricula em 09/10	3	-	5	-
L:M	3	Plano de estudos a partir de 2009	3	-	5	-
L:Q	31	Plano de estudos Oficial	3	-	5	-

Teaching language

Portuguese

Objectives

Sampling and sample treatment are of utmost importance steps in the
analytical process, however they are also those for which the analyst
is usually less prepared to deal with.
Our aim with this subject is to introduce the tools and concepts that
will allow to minimize the effect of sampling errors in the analytical
result.

Program

1. Introduction
2. Measurements and decisions
3. Samples and Universe
4. Strata, lot, increment, composite sample
5. Purpose of sampling
6. Sampling plan: n. of samples, sampling frequency
7. Sampling Methods
8. Sampling errors
9. Sampling constants
10. Evaluation of the number of samples
11. Sampling Cost
12. Examples of sampling plans
12.1 Soil sampling
12.2 Water sampling
12.3 Air sampling
13. Sample storage
14. Sample treatment process
14.1 Acid digestion
14.2 Micro-wave digestion
15 Extraction
15.1 Supercritical fluids extraction
15.2 Solid phase extraction and microextraction

Lab works:

Random sampling: practical example.

Evaluation of sampling error in solids

Particle size distribution in a sample by sieving.
Evaluation of sample size effect on analytical results.

Effect of sample size on the standard deviation.
Particle size reduction.

Demonstration of use of an individual air sampling. Calibration and
collection of air samples.

Evaluation Type

Distributed evaluation with final exam

Assessment Components

Description	Type	Time (hours)	Weight (%)	End date
Attendance (estimated)	Participação presencial	56,00
	Total:	-	0,00

Eligibility for exams

The assessment is made taking in consideration:
- written exam
- lab evaluation
- written project
- oral presentation of the project

Calculation formula of final grade

written exam- 50% (minimum score 7/20)
lab evaluation- 25% (minimum score 10/20)
written project with oral presentation- 25 %

Observations

BIBLIOGRAPHY

Métodos de Amostragem, C. M. Pereira, Departamento de Química, FCUP,
Porto, 1989.
Sampling for Analytical Purposes, P. Gy, John Wiley & Sons, 1ª Ed.,
Chichester, 1999.
Quantitative Chemical Analysis, D. C. Harris, W. H. Freeman, 5ª Ed.,
Nova Iorque, 1997.
Acceptance Sampling in Quality Control, Second Edition, Dean V.
Neubauer and Edward G. Schilling, Chapman and Hall/CRC 2009
A Primer on Quality in the Analytical Laboratory, John Kenkel, CRC Press, 2000
Air Sampling and Industrial Hygiene Engineering, Dennis W. Day and
Martha J. Boss, CRC Press 200