Utilize a transfer pipette to handle this and follow the procedure below:
  1. Weigh the pipette and tare the weight.
  2. Fill the pipette with a liquid sample.
  3. Place the pipette on the balance and record the weight.
  4. Pipette out the liquid into the IDF Bag.
  5. Weigh the pipette and subtract that weight from the weight with a sample. This supplies us with the actual sample weight that went into the bag.