Shelf life represents the useful storage life of food. When the shelf life expires, the food may be developing changes in taste, aroma, texture or appearance caused by microbiological or chemical activity within the food.
There are some sources of error that affect the outcome of laboratory analysis for any component, including sampling errors, degradation, and tolerance.
The 2010/2011-grain harvest was unique across Eastern Australia with rain falling before, during and after harvest. Signs of mould were appearing on grain samples from across the eastern states with many buyers concerned that a white and pink mould evident on weather-damaged wheat and barley samples may be toxic.