water purity test

This is used as a water purity test, as the presence of bacteria introduces organic carbon.

It will not show up in Isely's water purity tests because it sinks to the bottom.

CIDA-funded water purity tests give Nicaraguans the peace of mind that they are truly drinking clean water.

The first desalination plant in the Northeast began operating in Cape May last week, passing drinking water purity tests and satisfying hotel guests, too.

Among the new products being developed at the pharmaceuticals and chemicals divisions were a drug to treat multiple sclerosis and a fast and simple water purity test.