Student Worker TrainingStudent Worker Training
Austin Peay State UniversityAustin Peay State University
Department of ChemistryDepartment of Chemistry
Fall 2013Fall 2013
Student Worker ResponsibilitiesStudent Worker Responsibilities
Office HelpOffice Help MailMail GradingGrading Other miscellaneous responsibilitiesOther miscellaneous responsibilities
Computer Lab AttendantComputer Lab Attendant Monitor roomMonitor room Note computer problemsNote computer problems Keep printer filled with paperKeep printer filled with paper
Student Worker ResponsibilitiesStudent Worker Responsibilities General Laboratory MaintenanceGeneral Laboratory Maintenance
Clean countertops / hoodsClean countertops / hoods Sort / restock lab drawersSort / restock lab drawers
Preparing General Chemistry LabsPreparing General Chemistry Labs Prepare solutions and dispensing Prepare solutions and dispensing
solidssolids Collect equipmentCollect equipment Set up / break down labsSet up / break down labs
Arriving to Work…Arriving to Work…
Sign log book in main officeSign log book in main office Report to your assigned supervisor for Report to your assigned supervisor for
taskstasks If your supervisor is unavailable, check If your supervisor is unavailable, check
“To Do” list“To Do” list Ask for something to doAsk for something to do
There is always something to do!
Laboratory SafetyLaboratory Safety
Come to work dressed as you would for labCome to work dressed as you would for lab
Always wear goggles when workingAlways wear goggles when working
Clean up after yourselfClean up after yourself
Respect others working with youRespect others working with you
Label all solutions properlyLabel all solutions properly
Dispose of waste properlyDispose of waste properly
Make sure all doors close behind youMake sure all doors close behind you
General Chemistry Lab General Chemistry Lab MaintenanceMaintenance
Wash down countertops and hoodsWash down countertops and hoods Make sure balances and surrounding Make sure balances and surrounding
areas are cleanareas are clean Fill all deionized water bottlesFill all deionized water bottles Fill all detergent and hand soap Fill all detergent and hand soap
bottlesbottles Replenish paper towel suppliesReplenish paper towel supplies Replenish weigh boat supplyReplenish weigh boat supply Make sure drawers are properly Make sure drawers are properly
stockedstocked
General Prep Room/Stockroom General Prep Room/Stockroom MaintenanceMaintenance
Wash down countertopsWash down countertops Put away clean glasswarePut away clean glassware
RacksRacks DishwasherDishwasher
Wash any dirty glasswareWash any dirty glassware Sweep floorSweep floor Last to leave:Last to leave:
Place trash can in Lab A311Place trash can in Lab A311 Close door between prep room and A311Close door between prep room and A311
Other General MaintenanceOther General Maintenance
Cleaning gogglesCleaning goggles Wash with soap & water every FridayWash with soap & water every Friday Swab with rubbing alcohol during the Swab with rubbing alcohol during the
week as neededweek as needed
Basic equipment repair and setupBasic equipment repair and setup Simple repairs (e.g., fixing broken pipet Simple repairs (e.g., fixing broken pipet
bulbs)bulbs) Equipment setup (e.g., calibrating pH Equipment setup (e.g., calibrating pH
meters)meters)
Laboratory PreparationLaboratory Preparation
Introductory labs (CHEM 1011, 1021, Introductory labs (CHEM 1011, 1021, 1041, 1111, and 1121) are overseen 1041, 1111, and 1121) are overseen by the lab manager, Mr. Palmerby the lab manager, Mr. Palmer
All other labs are overseen by the All other labs are overseen by the responsible faculty memberresponsible faculty member
Laboratory PreparationLaboratory Preparation Preparing solutionsPreparing solutions
Dispensing solids into temporary Dispensing solids into temporary containerscontainers
Gathering equipmentGathering equipment
Setting up / removing chemicals and Setting up / removing chemicals and equipment in labsequipment in labs
Laboratory PreparationLaboratory PreparationEach introductory lab Each introductory lab has an associated has an associated prep sheet outlining:prep sheet outlining:
ChemicalsChemicals
SolutionsSolutions
Special equipmentSpecial equipment
Waste disposalWaste disposal
Working with ChemicalsWorking with Chemicals
Always wear gogglesAlways wear goggles
You may need to wear glovesYou may need to wear gloves
Ask your supervisor or check the Material Ask your supervisor or check the Material Safety Data Sheet (MSDS) if unsure of Safety Data Sheet (MSDS) if unsure of specific hazardsspecific hazards
Clean up all spills / messes immediatelyClean up all spills / messes immediately
Preparing SolutionsPreparing Solutions Concentrations needed may be approximate Concentrations needed may be approximate
or exactor exact Use volumetric glassware for exact concentrationsUse volumetric glassware for exact concentrations Can use beakers or poly storage bottles for Can use beakers or poly storage bottles for
approximate concentration solutionsapproximate concentration solutions
Some reagents are aqueous solutions and Some reagents are aqueous solutions and may need to be dilutedmay need to be diluted Use the dilution equation, MUse the dilution equation, MccVVcc = M = MddVVdd
Always add concentrated acids to waterAlways add concentrated acids to water
All calculations should be checked by your All calculations should be checked by your supervisorsupervisor
Using a BalanceUsing a Balance NEVER weigh into weigh boat on balanceNEVER weigh into weigh boat on balance
Place weigh boat on balancePlace weigh boat on balance Tare balanceTare balance Remove weigh boat from balance and add Remove weigh boat from balance and add
solidsolid Place weigh boat back on balancePlace weigh boat back on balance Remove weigh boat again before adding or Remove weigh boat again before adding or
removing solidremoving solid
Dispose of excess solids properlyDispose of excess solids properly NEVER put back into reagent bottle, use NEVER put back into reagent bottle, use
beaker as temporary waste containerbeaker as temporary waste container Ask your supervisor if unsureAsk your supervisor if unsure
Labeling ChemicalsLabeling Chemicals
For introductory labs, labels must For introductory labs, labels must match names used in labmatch names used in lab e.g., vinegar vs. acetic acide.g., vinegar vs. acetic acid
Unknowns should match the Prep SheetUnknowns should match the Prep Sheet
Label format:Label format:
Labeling Chemical HazardsLabeling Chemical HazardsNFPA = National Fire NFPA = National Fire
Protection AssociationProtection Association
Chemicals rated in 4 Chemicals rated in 4 categories:categories:
Health (blue)Health (blue) Fire (red)Fire (red) Reactivity (yellow)Reactivity (yellow) Specific hazards Specific hazards
(white)(white)
Each category is rated on a Each category is rated on a scale of 0 (low risk) to 4 scale of 0 (low risk) to 4 (high risk)(high risk)
The specific hazard category The specific hazard category uses symbols to highlight uses symbols to highlight the special hazard.the special hazard.
Volumetric GlasswareVolumetric GlasswareUsed when exact concentration is necessary
Volumetric Flasks Volumetric Pipets Burets
Other GlasswareOther Glassware
Beaker
Erlenmeyer Flask
Mortar & Pestle
Buchner Funnel
Filter funnel
Crucible & Cover
Evaporating Dishes
Watch Glass
Filter Flask
Graduated
Cylinders
Storage ContainersStorage Containers
Poly Bottles
Glass Bottles Carboys
Hold 50 – 1000 mL
Hold 50 – 1000 mL
Hold 5 – 30 L
Amber BottlesHold 50 – 1000 mL
VialsHold 1 – 100 mL
Wash BottlesHold 50 – 1000 mL
Lab EquipmentLab Equipment
Ring Stand
Tripod
Clamp
Buret Clamp
Bunsen Burner
Meeker Burner
Flints and Strikers
Rings Wire Gauze & Clay Triangle
Additional Lab EquipmentAdditional Lab Equipment
Test Tube Holders
Bottle Brushes
Thermometers
Crucible Tongs and Beaker Tongs
Spatulas and Scoopula
Cork and Rubber Stoppers
Chemical WasteChemical Waste
Always check with your supervisor Always check with your supervisor before throwing anything in the trashbefore throwing anything in the trash
The professor or the lab manager will The professor or the lab manager will prepare waste bottles for all chemicalsprepare waste bottles for all chemicals
Check label on waste bottle before Check label on waste bottle before adding anythingadding anything
Chemical Waste LabelChemical Waste Label
Waste Label identifies:Waste Label identifies:
Start dateStart date
Chemical namesChemical names
ConcentrationsConcentrations
HazardsHazards
Contact infoContact info
General Waste Disposal General Waste Disposal GuidelinesGuidelines
DO NOT mix organic solvents (acetone, hexane, etc.) DO NOT mix organic solvents (acetone, hexane, etc.) with aqueous solutionswith aqueous solutions
DO NOT pour chemicals down the drainDO NOT pour chemicals down the drain
DO NOT mix halogenated organic solvents DO NOT mix halogenated organic solvents (methylene chloride) with non-halogenated organic (methylene chloride) with non-halogenated organic solvents (hexane)solvents (hexane)
Chemicals containing heavy metals (metals larger Chemicals containing heavy metals (metals larger than Calcium, atomic number > 20) MUST be than Calcium, atomic number > 20) MUST be collectedcollected
General PointsGeneral Points Safety comes firstSafety comes first
Clean up after yourselfClean up after yourself Respect chemicals and equipmentRespect chemicals and equipment
Be responsible and courteous of Be responsible and courteous of those around youthose around you Don’t leave doors propped or unlatchedDon’t leave doors propped or unlatched Clean up after yourselfClean up after yourself Don’t be afraid to ask questionsDon’t be afraid to ask questions
There is ALWAYS something to do There is ALWAYS something to do