so you forgot about your PBT test until the night before Flashcards
What is the ratio of soil to water for a soil sample?
1 part soil to 5 parts water
Who do you consult when you’re not sure of something?
SUPERVISOR
What kind of test do you conduct to see how many ions are in a solution?
Conductivity
What should be on a label?
Sample ID
Dilution factor
Matrix
Date
Time
Initials
Storage
Hazards
How long can a sample be stored when it’s being tested for pH
must be tested within 2 hours
What are some examples of effective communication?
Speaking clearly
Listening actively
Seeking clarification
What are some benefits of teamwork?
Dividing work
Planning work
Completing work more quickly
Who is responsible for the safety of all employees?
Everyone
What is the acceptable range of error for pH when calibrating?
+- 0.05 pH units
What is the acceptable range of error for conductivity when calibrating?
+-5%
What is the acceptable range of error for a top pan balance when calibrating?
+-0.1g
What is the acceptable range of error for an analytical balance when calibrating?
+-0.001g
How to clean general glassware?
Remove any ink with acetone, rinse 2-3 times in warm water with soap, rinse with tap water, rinse with DI water, hang up to dry.
How to clean volumetric glassware?
Rinse with tap water. Rinse with DI water. Hang up to dry.
Pipettes and flasks should be put upside down to try.
Maximum storage time for conductivity testing?
28 days
What would you do if sample is potentially hazardous?
Consult SDS
How would you resolve a disagreement between yourself and a colleague?
Try and resolve it with the colleague
Ask another colleague or unrelated 3rd party to help mediate (outside of working hours if possible)
Consult management if necessary
Client wants sample turned around faster than possible
Inform them of this, offer to check how far along their sample is and give an ETA if they press, consult supervisor if they press further
What is the uncertainty of measurement on an analytical balance
0.00005g
(5 zeroes)
What is the uncertainty of measurement on a top pan balance?
0.005g
(2 zeroes)
How to convert nitrate to nitrate-nitrogen?
/4.4
More words gets divided
5 safety issues in the laboratory
1) Broken glassware
2) Slips trips falls
3) Handling hazardous chemicals (follow SOP)
4) Chemical splashes - use ppe
5) chemical aerosols - use fume hood
