Lab: Safety, Equipment, Ware, Math Flashcards
PPE (when do we remove gloves, when do we wash hands?)
- Torn
- Contact with blood, body fluid, non-intact skin, or mucous membranes
- Contact with a single patient
- Patient’s surrounding or contaminated body site
- Between patient visits
Name the 4 types of isolation
- Standard precautions
- contact
- Droplet
- Airborne
pH (what is neutral, acidic, alkaline?)
Acidic - Lower than 7
Neutral - 7.0
Alkaline - Higher than 7
Critical types of glassware in the lab
- Volumetric
- Pipette volumetric
Non-critical types of glassware in the lab
- Beakers
- Cylinders
- Flask Florence
- Graduated
Materials used in the lab
- Flint glass
- Borosilicate glass
- Quarts glass
Application of the 70% alcohol in the lab?
- 70% isopropyl alcohol kills microorganisms
- Effective against most bacteria, fungi, and many viruses
Units of measurement: Deci
One tenth
Units of measurement: Centi
One hundredth
Units of measurement: Hecto
A hundred
Disinfectants in the lab: Hypochlorites
- Emergency clean ups
- Work surfaces
- Dirty glassware
- Equipment
- Liquids
Disinfectants in the lab: Phenolics
- Rubber
- Wood
- Some plastic
Disinfectants in the lab: Formaldehyde
- Effective against spores
- Safety cabinets and rooms
Disinfectants in the lab: Glutaraldehyde
- Effective against wide range of organisms
- Metal equipment
What is precision?
Reproducibility and reliability of the test method
What is accuracy?
Closeness of a measurement value
MSDS Information: Section 1
Product info
MSDS Information: Section 2
Hazardous ingredients
MSDS Information: Section 3
Physical data
MSDS Information: Section 4
Fire Hazard
MSDS Information: Section 5
Reactivity data
MSDS Information: Section 6
Toxicology properties
MSDS Information: Section 7
First aid measures
MSDS Information: Section 8
Preventative measures
MSDS Information: Section 9
Preparation
Necessary working label info
- Supplier identifier
- MSDS available
- Pictograms
- Risk phrases
Non-necessary working label info
Immediate use of a hazardous product
Balances in the lab: Mechanical
- Requires use of weight boat to prevent corroding
- Not as accurate as digital
- Often needs calibration by weight
Balances in the lab: Digital
- Requires use of weight boat
- Used most often
- More accurate
- Needs less calibration
Biosafety Cabinet: Class I
Protection to worker but not product
Biosafety Cabinet: Class II
Both operator and product protection
Biosafety Cabinet: Class III
High level of protection
Name the 9 parts of the microscope
- Light
- Condenser
- Iris diaphragm
- Field diaphragm
- Coarse adjustment
- Fine adjustment
- Objective lenses
- Ocular (eye pieces)
- Stage
What’s the highest purity in chemicals?
Reagent
Sterilization: Temperature
121C (250F)
&
132C (270F)
Sterilization: Devices used for sterilization
- Autoclaves
- Plasma gas
- Vapourized hydrogen peroxide
What does sanitization mean?
Lowering the number of germs to a safe level
How do we calculate the magnification power of the microscope?
Magnifying part of the object x part of the eye
Temperatures in the lab: Cold
4 C
Temperatures of the lab: Frozen
-23 – 0C
Two standard deviation
- Measure of dispersion
- 95% of values will be within 2 SD’s of the mean
Three-Percentage
W/V %
V/V %
W/W %
Types of water in the lab: Distilled
Condensate from steam created when water is boiled
Types of water in the lab: Deionized
Passing tap or distilled water through resin column containing charged particles
Types of water in the lab: Reverse Osmosis (RO)
Forces water through semipermeable membrane
Types of water in the lab: Type 1
Ultrapure Water (Highly purified):
Highly sensitive products
Types of water in the lab: Type 2
Purified Water:
- Glassware rinsing
- Lab equipment
Types of water in the lab: Type 3
Primary Grade Water:
Non-critical washing
Mode, Median, Mean
Mode - Most common number
Median - Middle number
Mean - Average (all numbers added up, divided by number of numbers)
Characteristics of distilled water
- Contains no solids, minerals or trace elements
- Does not remove carbon dioxide, chlorine or ammonia
- Steam from water after boiled
Supersaturated solution: When temperature drops, what will happen?
Solute remains in solution until there’s a disturbance
Sterilization vs Disinfection
Filtration is not a form of sterilization
Name 4 of the most frequent types of sterilization
- Steam Autoclave
- Gas Sterilizer (ethylene oxide)
- Dry Heat
- Boiling
What are 3 areas you can disinfect?
- Surfaces/equipment that cannot be autoclaved
- Biohazard spills
- Containers for discarding pipettes & slides
What is Antiseptic used for?
Skin, not surfaces
Autoclave/Dry heat oven (160C). What doesn’t it do?
Rust instruments
Which surface is Glutaraldehyde used for?
Metal surfaces
How long do you boil instruments and tools to sterilize them?
30 mins
Incineration is used for?
Fecal
What’s the percentage for a discard jar for sodium hypochlorite?
1 - 2.5%
What is Bleach used for?
Biohazard spills
Which solution is preferred as a disinfectant?
70% ethyl alcohol or 1% hypochlorite
What are Universal Precautions?
Treating all specimens as if they are hazardous
How many sections are on an SDS?
16
What does the RED section stand for on a NFPA label?
Flammability
What does the BLUE section stand for on a NFPA label?
Health
What does the YELLOW section stand for on a NFPA label?
Reactivity
What does the WHITE section stand for on a NFPA label?
“Special” (reacts with water or is oxidizing)
Ionizing Radiation: Alpha Rays
- Big particles
- Can be stopped by paper
Ionizing Radiation: Beta Rays
- Small particles
- Can be stopped by 6mm aluminum
- Can penetrate matter
Ionizing Radiation: Gamma Rays
- Tiny particles
- Requires lead to stop penetrating rays
Non-ionizing Radiation: Visible light, Microwaves
- Low energy waves that can move particles and warm them up
- Not causing serious harm
Non-ionizing Radiation: Microorganisms with Spores
Highly resistant to UV radiation
Acid Spill Kits
- Neutralizes acid (makes paste)
- PPE
- pH check
Caustic Spill Kit
- Neutralizes base (makes paste)
- PPE
- pH check
Solvent Spill Kit
- Adsorption (charcoal)
- PPE
Radiation Spill Kit
- Absorption
- Alert everyone FIRST
- Contain spill
Mercury Spill Kit
Aspirate/ventilate fumes
Biological Spill Kit
- Paper towel
- Disinfectant (outside to the inside)
- PPE
Fire Extinguishers: A
- Wood
- Paper
- Clothes
Fire Extinguishers: B
- Gases
- Oil Fires
Fire Extinguishers: C
Electrical Fires
Fire Extinguishers: D
Combustible metal fires
Fire Extinguishers: K
Cooking (oil/grease)
What’s included in a Fire Triangle?
Heat, Fuel, Oxygen
Most common types of extinguishers?
A, B, C
Biological Containment Types: Level 1
- Low individual
- Low community risk
Biological Containment Types: Level 2
- Moderate individual
- Low community risk
Biological Containment Types: Level 3
- High individual
- Low community risk
Biological Containment Types: Level 4
- High individual
- High community risk
What’s the definition of Aerosols?
Particles suspended in the air, which may gain access to the respiratory system
Fume Hoods: Chemical Fume Hood
- Duct, fan & filter
- Negative pressure
- Air vented outside
Fume Hoods: Biological Safety Cabinet
- Mechanical filtration
- Air filtered & recirculated
Fume Hoods: Class 1
Small protection:
- Protects user
- Some environmental protection
Fume Hoods: Class 2
Medium Protection:
- Protects user
- Protects environment
- Protects sample
Fume Hoods: Class 3
Large Protection:
- “Glove box”
- Gas tight
- Double doors
Fume Hoods: Laminar Flow Hood
- One way airflow
- Different from biological safety cabinet
PPE: Donning (putting on)
- Gown
- Mask
- Goggles
- Gloves
PPE: Doffing (taking off)
- Gloves
- Goggles
- Gown
- Mask
Pipettes: TD
To Deliver
Pipettes: TC
To Contain
Pipettes: Mohr
- Calibration marks TD
- Do not drain past the final volume marking.
- Not calibrated to tip
Pipettes: Volumetric
- Single accurate measurement
- Calibrated TD
- Bulb shape in the middle
Pipettes: Serological
- Calibration marks TD
- 1 etched ring = drain
- 2 etched rings = blow out
Pipettes: Pasteur
Tiny pipette to add final drops
Pipettes: Micro
- Adjustable volumes
- Both TD/TC
Glassware: Class A
Analytical Labs
Glassware: Flint/Soda Lime
- Low heat resistance
- Low chemical resistance
- Test tubes (disposable)
Glassware: Borosilicate
- Not chemically reactive
- High thermal resistance
- Most commonly used
Glassware: Quartz/Silica
- Expensive
- High optical quality for precision
- Microscope lens
Types of Glassware: Estimated Volume
- Beaker
- Erlenmeyer
- Florence (boiling flask)
- Graduated Cylinder
Types of Glassware: Volumetric
Volumetric Flask
Plastic: Polyethylene
Graduated Cylinders:
- Clear
- Inexpensive
- Disposable
Plastic: Polystyrene
Petri Dishes, Test Tubes:
- Clear
- Inexpensive
- Disposable
Plastic: Polypropylene
- Milky colour
- Heat resistant
Microscope: Ocular Lenses
They eye pieces
Microscope: Objective Lenses
Adjustable magnification lenses (4x, 10x, 40x, 100x)
Microscope: Rheostat Knob
Adjusts the light intensity from the light source
Microscope: Condenser
Collects light and focuses it on the specimen
Microscope: Iris Diaphragm
Adjusts light intensity (fine adjustment for light)
Microscope: 10x
- Locate specimen
- Coarse focus adjustments
Microscope: 40x
- High dry
- Fine focus adjustments
Microscope: 100x
Oil immersion
Magnification Increase
Light intensity increase
Vernier Coordinates
Measurements on the stage ruler to articulate location of the specimen
Thermometers: Internal Electrical
Digital
Thermometers: Partial Immersion
When specified portion of thermometer is exposed to the temperature
Thermometers: Total Immersion
Temperature when bulb and total liquid inside is exposed to temperature
Autoclave: Temperature, PSI, Time
- 121C
- 15 PSI
- 15 Mins
Centrifuge Responsibilities
- Decontaminated after every shift
- Balance (most important)