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.
How long will cooked rice stay fresh without refrigeration? one week   **** All cooked food can have bacterial contamination after 2 hours  left in 40 degree -85 degree temperatures. Cooked food kept below  40 degrees or above 85â¦ degree temperatures is safer.