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This is the complete lecture note for BST411 Quality Control I. You can read it online below, open it in the full viewer, or download the PDF for offline study. It pairs with the course's video lectures, so you can read and watch together.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS • Course code: BST411 • Course title: Quality Control I • Course credit load: 3 Series 1: Sensory Evaluation and Beer Styles Series outline • Part 1: Fundamentals of Sensory Evaluation o 1.1.1 Definition and scope of sensory evaluation o 1.1.2 Importance of sensory evaluation in brewing o 1.1.3 Basic sensory physiology: taste, smell, and mouthfeel • Part 2: Organoleptic Methods and Taste Panels o 1.2.1 Organoleptic methods of beer analysis o 1.2.2 Taste testing procedures and protocols o 1.2.3 Organisation and training of sensory panels • Part 3: International Beer Styles and Sensory Attributes o 1.3.1 Overview of key international beer styles o 1.3.2 Taste characteristics: sweetness, bitterness, sourness, saltiness, umami o 1.3.3 Aroma and flavour profiles across beer styles • Part 4: Practical Sensory Classes and Applications o 1.4.1 Conducting sensory classes in brewing education o 1.4.2 Application of sensory evaluation in quality control o 1.4.3 Case studies and practice exercises Introduction Beer is one of the most widely consumed beverages in the world, and its quality is often judged not only by technical analysis but also by how it appeals to the senses. Sensory evaluation provides a
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS structured way of assessing taste, aroma, and flavour, ensuring that beer meets consumer expectations and maintains consistency in production. For learners of brewing science, developing sensory skills is essential because it bridges the gap between laboratory analysis and the actual drinking experience. The aim of this Series is to equip you with the knowledge and skills required to carry out sensory evaluation of beer and to recognise the distinctive attributes of key international beer styles. We shall commence this Series by exploring the fundamentals of sensory evaluation, including its definition, scope, and physiological basis. Next, we will examine organoleptic methods and the organisation of taste panels. Following that, we will analyse the sensory attributes of international beer styles, focusing on taste, aroma, and flavour. Finally, we will conclude with practical sensory classes and applications, where you will learn how sensory evaluation is applied in real brewing contexts. Series Learning Outcomes Upon completing this Series, you should be able to: • SLO 1.1 define sensory evaluation and explain its importance in brewing, • SLO 1.2 describe the physiological basis of taste, smell, and mouthfeel, • SLO 1.3 demonstrate organoleptic methods of beer analysis, • SLO 1.4 organise and participate effectively in sensory taste panels, • SLO 1.5 analyse the sensory attributes of key international beer styles, and • SLO 1.6 apply sensory evaluation techniques in practical brewing and quality control contexts. 1.1 Fundamentals Of Sensory Evaluation 1.1.1 Definition and scope of sensory evaluation Sensory evaluation is the systematic assessment of products using human senses such as taste, smell, sight, touch, and hearing. In brewing, it refers to the structured process of judging beer quality based on how it appeals to consumers. This method complements laboratory analysis by providing insights into flavour, aroma, and mouthfeel that cannot be captured through chemical tests alone.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Diagram showing the five human senses used in sensory evaluation. Caption: Figure 1.1 Human senses applied in sensory evaluation Fill in the blank: Sensory evaluation in brewing is the systematic assessment of beer using ________. 1.1.2 Importance of sensory evaluation in brewing Sensory evaluation is important because it ensures consistency in beer production, helps detect faults early, and aligns products with consumer preferences. Brewers rely on sensory panels to identify off-flavours, assess balance, and maintain brand identity. Without sensory evaluation, even technically sound beers may fail to satisfy drinkers.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Box 1.1 Key benefits of sensory evaluation in brewing Short description: A boxed list of benefits such as consistency, fault detection, consumer alignment, and brand identity. Fill in the blank: Sensory evaluation helps brewers maintain ________ in production and detect faults early. 1.1.3 Basic sensory physiology: taste, smell, and mouthfeel Taste refers to the five basic sensations detected by the tongue: sweetness, bitterness, sourness, saltiness, and umami. Smell is the perception of volatile compounds through the nose, which contributes significantly to flavour. Mouthfeel describes the physical sensations of beer in the mouth, such as body, carbonation, and astringency. Together, these elements form the sensory profile of beer.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Short description: Image of a beer tasting session showing tasters evaluating aroma and flavour. Caption: Plate 1.1 Beer tasters assessing aroma and flavour Fill in the blank: The five basic tastes are sweetness, bitterness, sourness, saltiness, and ________. Pilot questions 1.1 1. Sensory evaluation in brewing involves the use of which human faculties? 2. Why is sensory evaluation considered important in beer production? 3. List three benefits of sensory evaluation in brewing. 4. Name the five basic tastes detected by the tongue. 5. What does mouthfeel refer to in the context of beer evaluation? 1.2 Organoleptic Methods And Taste Panels 1.2.1 Organoleptic methods of beer analysis Organoleptic methods are techniques that rely on human senses to evaluate the quality of beer. These methods involve structured tasting sessions where trained panellists assess attributes such as flavour, aroma, appearance, and mouthfeel. Unlike purely chemical analysis, organoleptic methods capture the holistic drinking experience, making them essential for quality control.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Flowchart showing steps in organoleptic beer analysis (appearance, aroma, taste, mouthfeel, aftertaste). Caption: Figure 1.2 Steps in organoleptic beer analysis Fill in the blank: Organoleptic methods rely on ________ to evaluate beer quality. 1.2.2 Taste testing procedures and protocols Taste testing requires a controlled environment to minimise bias and external influences. Samples should be served at appropriate temperatures, in identical glasses, and coded to prevent identification. Panellists are instructed to focus on specific attributes, such as clarity, foam stability, aroma intensity, and flavour balance. Standardised protocols ensure consistency across sessions and allow results to be compared reliably.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Table 1.1 Standard conditions for beer taste testing Short description: Table listing conditions such as serving temperature, glass type, sample coding, and panel environment. Fill in the blank: To avoid bias, beer samples in taste testing should be ________. 1.2.3 Organisation and training of sensory panels A sensory panel is a group of trained individuals who evaluate beer using organoleptic methods. Training involves familiarising panellists with flavour standards, teaching them to recognise off-flavours, and calibrating their responses to ensure consistency. Effective panels require diversity of perception, structured feedback, and regular practice. Panel leaders play a crucial role in guiding discussions and ensuring that evaluations remain objective.
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