Hi,

I made a citric buffer solution on 3/27 which has been stored in a 5°C fridge. When I transferred this solution to the cuvette today (5/7), and heated it in the water bath (95°C) for about 10 minutes, it turned cloudy. Online says it might be the pH, but when I went to check it was about 5.95, so not horribly off. This is happening with multiple citric buffers we've made. Does anyone know why this might be happening?