Sample dilution

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Equipment

  • Brown veils and cups
  • Inserts

Materials

  • benzophenone
  • Petroleum ether

Protocol

Solutions A

For 30 ml - 29.7 ml petroleum ether + 300 ul benzophenone

Solution B

For 30 ml - 25 ml solution A + 25 ml petroleum ether

Sample dilution

  • Each sample should be diluted to two concentrations: 1:125 and 1:5000
  • From each sample 8 ul will be dilutes with 992 ul solution B (for 1:125 dilution)
  • From each sample 25 ul (from the 1:125 dilution) will be dilutes with 975 ul solution B (for 1:5000 dilution)