Collection and Processing of Samples

Code:

Q330

Acronym:

Q330

Keywords
Classification	Keyword
OFICIAL	Chemistry

Instance: 2016/2017 - 2S

Active?	Yes
Web Page:	http://moodle.up.pt/course/view.php?id=167
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	0	Plano de Estudos a partir de 2008	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	-

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.

Learning outcomes and competences

Learning Outcomes:

Know the basics of sampling and different sampling methods;

know the basics of collecting air samples;

understand the basic principles of sampling soil;

understand the basic principles of sampling water;

understand the basic principles of storage and transportation of samples;

know the principles of treatment of samples taking into account the origin and objectives of analysis;

learn the basics of sample digestion wet and microwave;

know the basics of the methods of liquid-liquid extraction, supercritical fluid extraction, extraction and solid phase microextraction.

 

Skills:

Identify the source of errors in the different steps of the analytical process;

estimate the errors in the different steps of the analytical process;

distinguish enters random sampling and not random;

learn to identify and put into practice the different types of sampling (systematic, random, stratified);

calculating constants sampling;

know how to use tables sampling by attributes;

development and implementation of sampling plans;

handling, calibration and maintenance of air sampling pumps;

use of microwave digestion for treatment of samples.

Working method

Presencial

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.

Mandatory literature

Gy Pierre; Sampling for analytical purposes. ISBN: 0-471-97956-2
Harris Daniel C.; Quantitative chemical analysis. ISBN: 0-7167-2508-8

Teaching methods and learning activities

Oral presentation of the subject, with discussion of various topics versed. Practical works illustrative of different aspects to be considered in the collection and processing of samples.

Evaluation Type

Distributed evaluation with final exam

Assessment Components

designation	Weight (%)
Exame	50,00
Participação presencial	0,00
Trabalho escrito	25,00
Trabalho laboratorial	25,00
Total:	100,00

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