Flow Cytometer, BD Accuri
BD ACCURI FLOW CYTOMETER (B457)
Rules and Guidelines
Before use:
1. New user MUST be trained by the captain or present users. For specific questions, you can ask Katie in B457 or email Andrew (BD representative) at tuan_m_nguyen@bd.com.
Flow Cytometer User Instructions
Notes from the Training Session:
• Do not run cells > 40um in diameter (the size of the flow cell is 200um and multiple cells sticking together can lead to clogging)
• The set threshold is sufficient for cells at least the size of lymphocytes. If you are running bacteria, you will need to change this.
Fluidics:
• ONLY USE BD APPROVED LIQUIDS (they are found under the hood of the accuri)
• Sheath fluid = 1L of di water + 1 vial of bacterial static reagent
• Cleaning concentration (detergent) = 3mL concentrate + 197mL di water
• Decontamination solution (special bleach) = 20mLs concentrate + 180mLs di water
• Fluidics works best with 1 million particles/500uLs. If you cells are especially large or sticky, use less.
• "Slow" fluidics: recommended for DNA stains, forms a uniform stream in the flow chamber
• "Fast" fluidics: stream is larger leading to less resolution
Optics:
• Blue laser is ON, yellow/green laser is modulated. This helps the machine know which laser is which.
• Alternative filters can be purchased for special applications
• Voltage may not be change. (Voltage is fixed to optimize sensitivity.)
Start-up:
• Make sure there is sufficient sheath fluid and enough space in the waste container
• Right after turning machine on, run di water for 15 mins (FAST fluidics). This purges all the air bubbles to insure sensitivity.
• If you are suspicious of the cleanliness, can also go to Instrument > Run Clean Cycle. This will run cleaning solution through the fluidics and is usually not necessary if users have been cleaning the
machine after every use.
Analysis:
• Use the analyze and statistic tabs to make blots and analyze data
• To export plots, drag and drop onto the desktop (to get higher resolution, change drag and drop options)
• To export raw data, File > Export All Samples To Third Party. This exports the data as an FCS file.
Compensation: required if you are looking at fluorphores with overlapping fluorescence
• Need to compensate manually: run a single color control, separate out the "single +" and "double +" cells using the quadrant marker, show median in the statistics bar, click set color compensation, then
correct by subtracting a few percentage points so that the "double +" are in line with the single positives. Apply to all samples.
Clean up:
• Run decontamination solution for 2mins.
• Then run di water for 2mins.
• Click Instrument > Run cleaning fluid cycle
• Press off–> the instrument then goes through its own decontamination process for 20mins.
If clogged: you will know that it is clogged because you will run a sample and get no events. Or you will run a sample and get a very small event rate.
• Use Backflush to gently unclog machine
• Use Unclog for a more powerful unclog
Quality Control
• Use 8-peak validation beads (found in 4C cold room): 2 mins, slow flow rate, gate on the singlet beads
• Check histogram of 4 different filters. You expect to see 8 peaks on FL1, FL2 and FL4. FL3 does not have 8 peaks usually.
• The CV (coefficient of variation) should be lower than 6% indicating that the peak is tight.
Maintenance (every 2 months for 2 moth maintanence kit or 1 year maintenance kit)
• Filters: change filters for the sheath fluid (large filter), decon and cleaning solution (smaller filters)
• Sheath in line filter: Look under container storage for this filter.
• Peristallic pump (important for accurately measuring volume): push out grey tab to pull out cover, unscrew blue connections, take out tubing, replace with new by realigning the track and snapping new pump
in.
MANUFACTURER: BD Biosciences
WARRANTY: One year of warranty comes with the C6. Since this is a special order C6 WE have on site support from a field service engineer.
CONTACT: If you have any instrument issues please call tel:877.232.8995 prompt 2 for a service engineer.
FULL MANUAL: File:BD Accuri C6Flow Cyto Instrument Manual.pdf
--Jessica Metzger 14:42, 21 April 2015 (EDT)