Drug Checking Flashcards
How long is the warm up phase for the FTIR machine?
10 minutes - bar will no longer be green on opus
Calibrating the FTIR to environment ensures what?
Measurements are cleaner and there’s less noise in the measured spectra
What does PQ mean? Should be done when?
Performance Qualification- calibration test
•must be done weekly
•should be done every time the machine is moved locations
How to run PQ test?
- Click status light (green) at the bottom right corner of the screen (on opus)
- Select accessory type
- Select PQ Test
- Select Run Test
- Takes 5 mins light will turn green when done
What is the 1st step of every drug check? And why?
Background Scan - click “measure background” on left hand side
Zeroes the sensor to prepare for the sample scan (just a like a scale) - must be done immediately before loading the sample
How many mg for testing?
5mg
What to do after background scan is done?
- Click “measure sample” on left hand side of screen
- Insert sample information
- Make sure line is flat
- Put drugs on the sensor
- Lower handle slowly
- When graph is past 0.3 click “start measurement” - bottom left
What is the format of the naming convention?
0 [site identifier]
MM [month of test]
DD [day of test]
YY [year of test]
## [daily sample number]
II [technician initials]
Graph should reach what level on the y axis?
Over 0.3
Samples are measured with how many scans?
24 scans - takes 24 seconds
Why is calibration important?
Because it’s sensitive to temperature and humidity so we need to account for those factors
3 reasons why we must clean the spectrometer after every sample?
- No cross contamination
- Ensure each measurement is representative of the respective sample
- Background scan will need to be performed for the next sample
Spectra is caused by infrared light
A) absorbed causing a peak
B) not absorbed causes a flat line
Definition of Spectra
Graphical representations of the sample’s chemical composition
X axis is the
Wave number
Representation of the frequency infrared light that is either absorbed (peak) or not absorbed (flat line)