The course aims to provide students with the basic theoretical and practical use of techniques for extracting useful components from food products that allow quality control. The student must acquire the ability to operate successfully in a chemical laboratory.

The course will address the chemical separations based on extraction.

The course is divided into two parts: a theoretical and a practical part of laboratory exercises.

Theory: lectures in the classroom. Extraction of compounds from solid matrices or solutions.  Extraction theory. Nernst Partition law , partition coefficient. Liquid-liquid separation techniques. separating funnel. Single and multiple extraction. Criteria for choice of solvent. Continuous extraction: liquid-liquid extractors for solvents more dense and less dense than water. Solid-liquid extraction: preliminary phase, extraction and purification. Filtration by gravity and  reduced pressure.  Ttraditional methods of extraction: squeezing, percolation, maceration. Extraction Soxhelet. Application of solid liquid extraction in the food industry. Solid Phase Extraction (SPE): separation mechanism and columns. Application of the SPE in the food analysis. Solid phase microextraction (MSPE): mode etrazione, materials extractants. Application in  food analysis.

Practical part: turning point in the lab. The laboratory provides the individual exercises or groups: the whole is highly dependent on the number of students attending. The exercises will be carried out in order to address some of the topics presented in the theoretical part. Every exercise is preceded by an explanation of the procedure for the food samples proposed by the teacher. The completion of the exercises also includes the application of   qualitative and quantittativa whichmethods as:TLC, volumetric analysis and spectrophotometry.

Compulsed propedeutity: To attend the course of Extractive Preparation and Quality Control of Dietary and Food Products, the student must have passed the General Chemistry and Organic Chemistry exams. 

Recommended propedeutity:To take the extractive preparation and quality control exam of dietary and food products, it is appropriate to have passed the laboratory analytical chemistry, Food Chemistry and Principles of Biochemistry of Nutrition, Physics

The student knows and practice the safety rules in the chemical laboratory; uses common equipment and laboratory glassware,  knows the safety data sheets of the various products as well as the procedures for the disposal of various waste.

The student knows the principles governing the different types of extraction from solid and liquid matrices. Based on the knowledge gained it is able to apply such techniques for the extraction of active ingredients from different food matrices (vegetable and / or animal) in order to make quality checks of the same.

The teaching material prepared by the lecturer in addition to recommended textbooks (such as for instance slides, lecture notes, exercises, bibliography) and communications from the lecturer specific to the course can be found inside the Moodle platform › blended.uniurb.it

Teaching

Lectures and laboratory exercises

Attendance

Attendance at the laboratory is mandatory and the acquisition of attendance signatures is a constraint to take the exam: 80% of the exercises are required

Course books

Books :"Analisi dei prodotti alimentari" di Paolo Cabras, Carlo I.G. Tuberoso - Piccin editore

Assessment

The final exam (oral) shall cover all the arguments of the lectures and laboratory. The student must demonstrate that they understand, and to be able to use, the basic concepts of each argument.

Disabilità e DSA

Le studentesse e gli studenti che hanno registrato la certificazione di disabilità o la certificazione di DSA presso l'Ufficio Inclusione e diritto allo studio, possono chiedere di utilizzare le mappe concettuali (per parole chiave) durante la prova di esame.

A tal fine, è necessario inviare le mappe, due settimane prima dell’appello di esame, alla o al docente del corso, che ne verificherà la coerenza con le indicazioni delle linee guida di ateneo e potrà chiederne la modifica.