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.
Q: The night before my long runs, I've been eating a little pasta with some fish and vegetables. What should I eat the night before my race? A: Have a little pasta with some fish and vegetables. Q: The night before my long runs, I've been eating a few slices of pizza and washing it down with a nice pale ale. What should I eat the night before my race? A: Have a few slices of pizza and a nice pale ale. Q: The night before my long runs, I've been eating nails, because that is how tough I am.