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Silver Intensification for Immunocytochemistry

  1. Prepare silver intensification solutions. Stock solution C may be prepared in advance. Prepare stock solutions A and B separately prior to intensification and use within 1 hour.
  2. Use the working solution immediately as it lasts only 10 min. Add 25-50 microliters of solution per well in quick succession; a small disposable dropper works best. (Alternative: make 15 ml of working solution and process in a plastic slide cassette). Expose sections to the solution for 4-8 minutes in a dark location, such as under an aluminum cover. You needn't work in absolute darkness, but the background decreases slightly if the intensification occurs away from bright light. The reaction is temperature sensitive and slows substantially below 24°C.
  3. Stop the reaction with a brief dip in 5% acetic acid.
  4. Wash for 10 minutes in deionized water and dry with an air canister.
  5. Cover slip in a medium of your choice.

Disclaimer: As conditions of use are outside our control, we make no warranties, express or implied, and assume no liability in connection with use of this protocol.

© 2000 Robert E. Marc
This protocol may be copied and distributed for educational and non-profit
purposes as long as acknowledgement of our copyright is included
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