Lab design Assignment 3 Unit 2.

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Presentation transcript:

Lab design Assignment 3 Unit 2

Grading criteria P3: Design a scientific laboratory, identifying its individual key features. M3: Justify key features in the non-specialist and specialist laboratory. D2: Analyse why good laboratory design is important for efficiency, effectiveness and safety.

What makes a workplace scientific? You have already investigated the use of science in the workplace and you found that science in some form or another is present in many workplaces. In this section of the unit you will be looking at what makes a workplace really scientific. Consider what you would expect to find inside a scientific workplace. Think about laboratories that you are familiar with in college.

Key features of a lab The key features of a lab are those that make it a scientific workplace, for example, building materials that will not be affected by substances in use in the lab. These could include floor, ceiling and wall coverings, such as specialist tiles or paint, types of specialist furniture such as benches with clear surfaces and surfaces on furniture that can withstand the types of substances in use.

Key features of a lab There will also be greater access to more services in the lab than in many other workplaces. Ventilation will be an important part of the laboratory, as there must be adequate fresh air, but this must not allow substances inside the lab to escape into the environment unchecked. The services that are required in the lab are; water, gas, electricity and you could include in this list a vacuum line.

Furniture in a lab The furniture will depend on the work being carried out but essential pieces might include benches and stools, sinks, storage cupboards, drawers and fume cupboards. Furniture in a lab can be free standing or fixed. It is usual for benches to be fixed because they will have services, water and waste outlets, gas and electric fitted to them and it would be dangerous if the benches were able to be moved.

Surfaces in a lab The surfaces in a lab will be different from those in your home kitchen as they have to be chemical proof and heat proof. Benches may have storage below them but there should be space for people to sit and work at them. Some labs, microbiology for example, require that there are no gaps between separate lengths of work surface to prevent the build up of chemical substances or microbes.

Storage in a lab Storage is a vital part of the lab. If there is not enough storage space, things that should be put away safely can get left out. This can be dangerous as they can block access and create hazards for people moving about the lab. Other hazards include paper which could be a fire risk if left lying around the lab.

Safety equipment in a lab In all labs there will be safety equipment. This could include fire extinguishers, a fire blanket, safety solutions and eye wash. All labs will have a first aid box in the room or close by. Sometimes a safety shower will be available to wash away large spills of substances from a person’s body.

Fume cupboards There may be one or a row of fume cupboards. Fume cupboards need maintenance to make sure that they are removing the correct volume of air to protect staff both working at the fume cupboard and in the surrounding area. The speed of flow depends on the substance in the fume cupboard. The fume cupboard acts as an extractor fan pulling air into itself, across the work surface and then up the chimney to be vented into the atmosphere. It is important that air contaminated with harmful organisms or fumes is cleaned before being released into the atmosphere. Air might also be filtered going into the cabinet to prevent contamination of what is being worked on. Fume cupboards can also contain gas, water and electric supplies, as well as a sink.

Access and workspace There are rules and regulations stating how much space is required in secondary schools for movement between benches and cupboards. They are published in a document called Building Bulletin 80 Science in Secondary Schools. This can also be found in a CLEAPPS document called G14 Designing and Planning Laboratories. One of the biggest problems in any workplace is the lack of space to move around and to work. This can have dangerous consequences.

Access and workspace When scientists and technicians are moving around the lab they need to carry samples or equipment in their hands, or move them on trolleys if they are heavy. If a technician is working at a lab bench, other people need to move past them without hitting them. If the bench space is insufficient, samples or equipment might be knocked off the bench or things could be put on the floor, which would add to the risk of tripping.

Access and workspace Equipment will need space around it for access should it need repair but also for air circulation to prevent overheating.

The specialist lab The work that is carried out in a lab will influence the type of equipment that is used there. Most labs will have several large pieces of equipment, numerous smaller pieces and several computers linked in. The storage required will vary, with special facilities for radioactive, flammable and toxic materials.

Medical lab In a medical lab machines will be used to diagnose illness, as well as monitor patients’ treatment. Many and varied tests can be carried out on many different types of sample. In particular, work in a microbiology lab is carefully controlled to prevent the spread of pathogens into the surrounding area. Any sample may be hazardous and must be treated accordingly.

Analytical Chemistry lab In an analytical chemistry lab there will be pieces of large equipment such as flame photometer, IR spectrometer, HPLC which will take up bench space and need services supplied (such as electricity, special gas supply, etc). Will also need wet chemistry area for titrations etc