Indicator,Temperature,Refrigerated Products,Field.

摘要

Devices which indicate irreversibly at 7, 10 and 13 C by means of a color change have been designed and tested. Under laboratory conditions the response of fresh made devices is highly reliable. Shelf life under normal storage conditions is unsatisfactory. However, if the devices are stored in the activated or frozen state the storage life is extended substantially. Thus, while some types of units may be shipped from manufacturer to user in the unactivated condition, they must be activated and stored cold immediately upon receipt. A means for attaching the device to a chilled blood bag is described. (Author)