According to CDC recommendations, how much Sodium Thiosulfate should be used for a 1 liter sample?

The correct amount of Sodium Thiosulfate to use for a 1 liter sample, as recommended by the CDC, is indeed 0.5 mL. This specific quantity is important for effectively neutralizing chlorine and other biocides in the water sample prior to testing for Legionella, which can be adversely affected by those agents. Properly neutralizing the sample ensures accurate results in tests for the presence of Legionella bacteria.

Using 0.5 mL strikes a balance that aligns with standard practice for preparing water samples for microbial analysis. It allows for sufficient neutralization while avoiding excessive amounts that could introduce variability or interfere with the testing process. This attention to detail is crucial in the context of Legionella assessment, where precise measurement and adherence to guidelines can significantly impact the outcome of water quality tests.