1 In general, the total dissolved solids concentration is the sum of the cations (positively charged) and anions (negatively charged) ions in the water.  Parts per Million (ppm) is the weight-to-weight ratio of any ion to water.
If you refrigerate the rice, and you want to eat it cold, its perfectly fine. People eat cold rice salads all the time. Cold rice pudding is fine. Its just sitting around at room temperature that is the problem.
The best estimate of how long cooked rice can be at roomtemperature before being refrigerated is 2 hours. Then, per foodservice recommendations, you have 4 hours to get the riâ¦ce to 40degrees F. Cooked rice is prone to the growth of Bacilluscereus . That bacteria actually produces spores that canwithstand cooking.