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.
Rating Newest Oldest. Best Answer: paul i would not reheat cold rice its the most dangerous to get food poisoning from and it can make you very sick. believe me i know i reheated rice ages back and i got bad food poisoning so bad i thougth i was going to die. I would chuck out the rice and get soemthing else to eat.