For the samples held in different refrigerated storage conditions,the RSD between each condition are very similar and range
between 0.02 and 4.75%. This implies that samples can be held at refrigeration temperatures for at least 3 d and run when convenient for the experimenter, which may be a large benefit to using the Sprint machine. The variation in results between
frozen storage at 35 or 80 8C was similar and the variation in RSD over time in the freezer appeared to decrease slightly.