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.
3. How Do You Eat Spam? Spam rose to popularity since you can eat it right out of the can, making it a useful product for feeding soldiers during World War II. But according to Spam enthusiasts, eating plain, cold Spam is like eating plain, cold chicken breast. Devotees swear that it lends itself to a variety of culinary deliciousness.