The prepared control can be used immediately, or divided into aliquots and
stored frozen ( -20 oC). Each aliquot should be sufficient for at
least one use. For example, if you will use this control in one well each time
you run the test, prepare 120 ul aliquots. Prepare 220 ul aliquots if you will
use the control in two wells.
Control aliquots must be kept frozen until just before use. Do not refreeze
controls once it has been thawed.