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Sample Collection and Processing

Code: Q3005     Acronym: Q3005     Level: 300

Keywords
Classification Keyword
OFICIAL Chemistry

Instance: 2021/2022 - 2S Ícone do Moodle

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 Chemistry

Cycles of Study/Courses

Acronym No. of Students Study Plan Curricular Years Credits UCN Credits ECTS Contact hours Total Time
L:B 0 Official Study Plan 3 - 6 56 162
L:CC 1 study plan from 2021/22 2 - 6 56 162
3
L:F 0 Official Study Plan 2 - 6 56 162
3
L:G 3 study plan from 2017/18 2 - 6 56 162
3
L:M 0 Official Study Plan 2 - 6 56 162
3
L:Q 16 study plan from 2016/17 3 - 6 56 162

Teaching Staff - Responsibilities

Teacher Responsibility
Carlos Manuel de Melo Pereira

Teaching - Hours

Theoretical and practical : 2,00
Laboratory Practice: 2,00
Type Teacher Classes Hour
Theoretical and practical Totals 1 2,00
Carlos Manuel de Melo Pereira 2,00
Laboratory Practice Totals 1 2,00
Manuel Augusto Gomes de Oliveira Azenha 2,00

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;
 

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;

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

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 and calibration of an individual air sampling. Demonstration of equipment for water sampling. Demonstration of sample treatment equipment (microwaves, mills).

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.

keywords

Physical sciences > Chemistry > Analytical chemistry

Evaluation Type

Distributed evaluation with final exam

Assessment Components

designation Weight (%)
Exame 50,00
Trabalho escrito 15,00
Trabalho laboratorial 35,00
Total: 100,00

Amount of time allocated to each course unit

designation Time (hours)
Estudo autónomo 76,00
Frequência das aulas 56,00
Trabalho escrito 10,00
Trabalho laboratorial 20,00
Total: 162,00

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 8.5/20) lab evaluation- 15% (minimum score 10/20) written project with oral presentation- 35 %

Classification improvement

Only applicable to the final exam.

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

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