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  • Ben Franklin once said, “By failing to prepare, you are preparing to fail.”

  • It’s vital that you prepare for each lab activity.

  • Before you begin, determine the possible risks,

  • wear the right PPE,

  • and be aware of any protective measures and emergency responses

  • that are pertinent for the chemicals that youll be working with.

  • When diluting acids or bases, always add the acid or the base to the solvent, such as water...not

  • the other way around.

  • Pouring the solvent into an acid or base can cause a violent reaction and you may get burned.

  • Never remove chemicals from the lab.

  • Use a break resistant secondary container to transport chemicals between lab spaces.

  • Chemicals must be handled safely in order to avoid skin, eye, or inhalation exposure.

  • First, let’s talk about protecting your eyes.

  • As we mentioned in our lesson about PPE, safety glasses with side shields offer some protection,

  • but they won’t help you when working with a potential splash hazard.

  • Splash goggles are more effective at protecting your eyes.

  • Chemical splash goggles should be marked with the code Z 87.1.

  • This code indicates compliance with American National Standards Institute.

  • Prescription glasses don’t offer adequate eye protection.

  • Wear safety glasses, goggles, or a full face shield over your prescription glasses.

  • Corrosive chemicals will harm you if they splash or come into contact with your skin.

  • A lab coat and gloves will help protect your skin to a degree.

  • But a full-length chemical-resistant lab apron is the best choice when working with splash

  • hazards.

  • If youre working with an especially corrosive chemical,

  • use full arm-length rubber gloves instead of the typical nitrile gloves.

  • Some chemicals in the lab can harm you without even touching you.

  • That’s why it’s important to be aware of inhalation exposure.

  • Never smell chemicals.

  • Always work with toxic chemicals under a fume hood.

  • And keep containers closed tightly if youre not using them.

  • If a large chemical spill occurs, evacuate, seal off the lab,

  • and notify the authorities.

  • Large spills can produce excessive vapors;

  • they have to be cleaned by qualified personnel.

  • Don’t re-enter the lab until your supervisor gives you theall clear”.

  • Flammable chemicals require special handling techniques.

  • First, always know the flammability and explosive potential for each chemical youre working

  • with.

  • Keep flammables away from all ignition sources, such as bunsen burners or hot plates.

  • Store flammable chemicals in a dedicated and grounded storage cabinet.

  • When youre finished working in the lab,

  • properly dispose of chemicals and waste according to federal, state, local, and institutional

  • requirements.

  • Use chemical-resistant plastic or metal containers for waste disposal.

  • Solvents should NEVER be evaporated under a fume hood as a means of disposal.

  • Check with your lab supervisor for the best way to evaporate solvents.

  • Any materials used to clean up a chemical spill, such as paper towels,

  • are also considered hazardous waste and must also be disposed of accordingly.

  • Preparation is the key to handling chemicals safely in the lab.

  • Know what youre working with, how to handle it, and what to do in case of accidental exposure.

  • In our next lesson, well talk about a few other common lab hazards that you need to

  • prepare for.

Ben Franklin once said, “By failing to prepare, you are preparing to fail.”


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B2 中上級

安全な化学物質の取り扱い/ラボの安全ビデオパート5 (Safe Chemical Handling / Lab Safety Video Part 5)

  • 40 7
    kuoyumei に公開 2021 年 01 月 14 日