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Survey on Laboratory Accidents and Laboratory Safety. Sophia CHENG Science Education Section, EMB June 2007. Survey on laboratory accidents in secondary schools . Background since 1995/1996 school year from 2002/2003 onwards, survey is conducted on a triennial basis. Objectives

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survey on laboratory accidents and laboratory safety

Survey on Laboratory Accidentsand Laboratory Safety

Sophia CHENG

Science Education Section, EMB

June 2007

survey on laboratory accidents in secondary schools
Survey on laboratory accidents in secondary schools
  • Background
    • since 1995/1996 school year
    • from 2002/2003 onwards, survey is conducted on a triennial basis
  • Objectives
    • to monitor standard of safety in school science laboratories
    • to take active measures to minimize the occurrence of laboratory accidents
accident statistics 05 06
Accident Statistics (05/06)
  • 464 schools responded (response rate : 93.4% )
  • Statistics
    • 296 schools without accident (64%)
    • 554 cases in 168 schools (36%)
    • 1.19 cases per school
    • 1.57 cases per 1,000 students studying science courses
    • 4.15 cases per 10,000 practical periods
  • 500 students and 8 staffs injured; most injuries were minor cuts or scalds
  • Cause of accidents: Carelessness

(students: 91.7%;teachers: 0.5%; LTs: 1.8%)

subjects involved 05 06

309 (56%)

134 (24%)

92 (17%)

18 (3%)

1 (~0%)

Subjects involved (05/06)
most common laboratory accidents
Most common laboratory accidents
  • Cuts:
    • caused by broken glass apparatus (e.g. test tubes or glass tubing), tools (e.g. dissection instruments or cutters) or sharp edges
    • about 50% of cases occurred in junior science lessons
    • injuries mostly on fingers and palms
most common laboratory accidents1
Most common laboratory accidents
  • Heat burns or scalds:
    • caused by carelessness in handling hot objects (e.g. tripods, Bunsen burners, metal rods, glassware or combustion spoons), hot liquids, Bunsen flame or lighted matches
    • about 69% of cases occurred in junior science lessons
evaluating lab accidents
Evaluating Lab Accidents
  • Find out how the accident happened
  • Identify the causes
  • Was the accident handled properly?
  • Learn from events and take steps to prevent recurrences
  • Keep proper records
  • Review in Subject Panel & SCLS meetings
  • Identify underlying failures in the safety management system
laboratory equipment
Laboratory Equipment

“Bunsen Burner Screen”

Spectacle Cabinet

Flexicam

laboratory equipment1
Laboratory Equipment
  • Hand Protector 隔熱護手墊
laboratory equipment2
Laboratory Equipment
  • Reduce breakage of glassware
    • Plasticware (e.g. dropper, beaker, funnel)
    • polypropylene (PP), polymethylpentene (PMP, TPX))
slide15

Laboratory Equipment

  • Measuring cylinders
laboratory equipment3
Laboratory Equipment
  • Thermometers
    • Non-mercury filled
    • Short vs long (150mm / 300mm)
    • Plastic coated
    • Reinforced bulb
    • Digital (-50 - 150oC)
microscale experiment
Microscale experiment

Pins

Shampoo solution

0.4 M NaOH

http://cd1.emb.hkedcity.net/cd/science/laboratory/safety_corner.htm

slide18

Microscale experiment

2007 CE-CHEM Paper 1, Q.3

slide19
Laboratory Safety and Management (http://emb.gov.hk/cd/sc References & Resources  Laboratory Safety and Management)
handbook on safety in science laboratories
Handbook on Safety in Science Laboratories

http://cd1.emb.hkedcity.net/cd/science/laboratory/safety/SHB_2002e.pdf

slide22
Include crucial guidance and information:
    • Safety management
    • Hazardous chemicals and their storage
    • Disposal of chemical wastes
    • Handling of glassware, plants, microorganisms, animals, radioactive substances, etc.
    • First aid in the laboratory
    • Laboratory accidents and insurance
slide23
Additional resources or information in appendices:
    • Risk assessment form
    • Some plants known to contain irritants
    • Report form on laboratory accident
    • Chemistry experiments requiring particular care
slide25

Learning and Teaching Resources on Safety in Science Laboratories

http://cd1.emb.hkedcity.net/cd/science/laboratory/SAFETY/safety_exemplars_e.pdf

slide26
Suggested teaching strategies for lessons on laboratory safety
  • Exemplars of learning activities
    • Laboratory safety rules
    • Eye protection
    • Safety information on chemicals
    • Risk assessment
    • What if a laboratory accident happens?