What is the purpose of a fume cupboard?
Fume cupboards are used widely in laboratories and are designed to capture and remove air-borne hazardous substances generated during laboratory experiments (e.g. gases, vapours, aerosols and particulates/dust).
What is the purpose of a fume?
Fume Hood Purpose and Importance The purpose of a chemical fume hood is to prevent the release of hazardous substances into the general laboratory space by controlling and then exhausting hazardous and/or odorous chemicals.
What is the purpose of a ventilation or fume hood?
A fume hood is a ventilated enclosure in which gases, vapors and fumes are captured and removed from the work area. An exhaust fan situated on the top of the laboratory building pulls air and airborne contaminants through connected ductwork and exhausts them to the atmosphere.
What are the components of fume cupboard?
The important design features for a fume cupboard of a box-like structure are tapered inlet, sash, baffle, working chamber and sash handle. They influence the ability of fume cupboard to contain and exhaust the hazardous chemicals. The performance of fume cupboard is primarily characterized by its airflow.
What is the purpose of the fume hood quizlet?
A fume hood is used to prevent toxic vapors from getting into laboratory air. The fume hood should be used if one is using chemicals that have inhalation warnings. Lay electrical wires where no one can trip over them. Everyone’s hands and lab must be dry and to not use an electrical equipment with a frayed wire.
What is the difference between a fume hood and a biological safety cabinet?
A chemical fume hood is designed to remove chemical fumes and aerosols from the work area while a biosafety cabinet is designed to provide both a clean work environment and protection for employees who create aerosols when working with infectious agents or toxins.
What should be stored in a fume hood?
Short answer: no. Chemicals should never be stored in a fume hood. Fume hoods serve a specific purpose in laboratories and educational settings, and storing chemicals inside can lead to extremely dangerous, entirely preventable consequences.
When should the chemical fume hood be used?
Fume hoods should be used when working with toxic compounds or compounds with a boiling point below 120°C. Fume hoods, or other effective local ventilation, must be provided and used when the materials used will exceed exposure limits in the laboratory.
Is a fume hood an engineering control?
Engineering controls are anything that that is built or installed to separate people from chemical, biological or physical hazards, and can include fume hoods, biosafety cabinets, glove boxes, and blast protectors.
What is the difference between laminar flow and fume hood?
Fume hoods draw in air across a workspace to remove hazardous fumes and fine particles, while laminar flow cabinets blow air through a filter and out to prevent contamination of samples by dust or biological materials.
What happens when chemical are stored in fume hoods?
Fume hoods are not designed as storage cabinets. When they are used as such, adverse reactions with flammable liquids or other reactive chemicals can occur. Numerous containers stored in a fume hood can impact airflow and decrease efficiency – potentially putting users or the environment at risk.
How can we minimize risk in the laboratory?
3.3. 4 Laboratory safety culture
- Eliminate a particularly hazardous chemical or process;
- Substitute a hazardous material for one that is less hazardous;
- Minimize quantities of experimental chemicals;
- Enclose processes in fume hoods or provide other local ventilation;
How can laboratory hazards be prevented?
Basic Safety Rules
- Know locations of laboratory safety showers, eyewashstations, and fire extinguishers.
- Know emergency exit routes.
- Avoid skin and eye contact with all chemicals.
- Minimize all chemical exposures.
- No horseplay will be tolerated.
- Assume that all chemicals of unknown toxicity are highly toxic.
What is the difference between fume hood and a biosafety cabinet?
What chemicals require a fume hood?
Applications. Fume hoods: Chemical fume hoods can be used to handle the following: odorous materials, toxic gases, reactive materials, chemicals that can spatter, aerosols, carcinogens, flammables or other toxic and volatile materials.
How can you prevent exposure to chemicals?
Wear gloves, masks, or other protective devices to reduce contact with the chemicals. Make sure you wash your hands with soap and warm water after using chemicals.
What is the purpose of a biological safety cabinet?
A biological safety cabinet (BSC) is a primary engineering control used to protect personnel against biohazardous or infectious agents and to help maintain quality control of the material being worked with as it filters both the inflow and exhaust air.
How do you manage chemical hazards in the workplace?
- Elimination: Discontinue the use of the hazardous chemical.
- Substitution: Replace the hazardous chemical with a less hazardous substance.
- Engineering Controls: Isolate people from the hazardous substance.
- Administrative controls: Change the way people work.
- PPE: Protect people with personal protective equipment.
How do fume cupboards work?
The cupboards rely on extraction, which could be controlled by the building’s air conditioning and heating system. Fumes are drawn into the hood and expelled through a neutralisation filter. In order to provide a good level of protection, fume cupboards need to be used effectively and maintained appropriately.
What is the function of a fume hood?
Most fume hoods are fitted with a mains -powered control panel. Typically, they perform one or more of the following functions: Warn of too large an opening at the front of the unit (a “high sash” alarm is caused by the sliding glass at the front of the unit being raised higher than is considered safe, due to the resulting air velocity drop)
How far should a fume cupboard be from a window?
When working in the fume cupboard, all materials must be kept inside the hood at least six inches from the window opening. The sash opening should be as small as possible to minimise the chance of fumes escaping. When the fume cupboard is not being used, remember to close the sash.
What is a canopy fume hood?
Canopy fume hoods, also called exhaust canopies, are similar to the range hoods found over stoves in commercial and some residential kitchens. They have only a canopy (and no enclosure and no sash) and are designed for venting non-toxic materials such as non-toxic smoke, steam, heat, and odors.