A calibration gas that is used to set the maximum reading on the scale of an analyzer.

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Abbreviation commonly used for Atomic Adsorption spectroscopy.

A measurement of pressure which sets a total vacuum as having a value of zero, abbreviated as psia or bar. Absolute pressure is equal to the sum of a pressure gauge reading and atmospheric pressure (14.69 psia or 1 bar at sea level).

The minimum point on the thermodynamic temperature scale: 0°K, -459.69°F or -273.16°C.

The degree of statistical agreement (usually at the 95% confidence level) between a measured value and the true value, or the certainty or sureness with which a measured value is known.

A registered trademark for pure and instrumentation specialty gas products offered by Air Liquide worldwide.

A group that makes recommendations on the exposure levels of hazardous materials in the workplace.

An organization that sponsors committees that develop standards for industrial manufacturers and consumers.

Gases that do not contain oxygen and are used for biological culture growth.