1.   All the samples were tested for bacteria.

2.   The great sensitivity of the test means that environmental samples can be tested for infectious organisms.

3.   Each sample was tested in triplicate.

4.   All samples were tested in triplicate using at least two different dilutions.

5.   The samples are tested as part of a process to minimize health risks to miners.

6.   Further water samples will be tested today when supplies are expected to be back to normal.

7.   As samples are tested, trucks are allowed to proceed because of their perishable contents.

8.   Assayers test ore samples to determine how much gold they contain.

9.   At first, they tested samples from patients with conditions that were known to the researchers.