The only sensors she had inside the gasbag were the ones to detect temperature, contamination, and pressure levels.

Officials from the Centers for Disease Control and Prevention said they had detected "scant contamination."

Such seals can help to detect theft or contamination, either accidental or deliberate.

"You know as well as I. Oscar, is there any way to detect contamination by the virus?"

In late August, Chiron detected bacterial contamination that might have infected millions of doses.

It has also been used as a marker compound to detect contamination in citrus juices.

Work will be halted if EPA detects contamination in the air.

Anne Canty, the department's deputy commissioner, said that testing yesterday detected continuing contamination, though at somewhat lower concentrations.

Monitoring wells are also being drilled to detect contamination.

He called for better technologies to detect contamination.