Abbreviation commonly used for atomic absorption spectroscopy.

The lowest point in the Kelvin temperature scale. 0°K = - 459.67°F or -273.15°C in the Farenheit or Celsius temperature scales, respectively.

Expresses the degree of agreement of a measured value when compared to the true or expected value of the quantity of concern. This term is often confused with precision, which is the range of the confidence level within which a measured value can be considered valid.

Describes gases that contain oxygen and which are commonly used as atmospheres for biological culture growth.

Describes gases that do not contain oxygen which are used for biological culture growth.

A gas blend used as a reducing atmosphere in the metals industry during heating to render them less brittle. A commonly used furnace gas consists of a blend of hydrogen and nitrogen.

The relative weight of an atom of an element, compared to carbon-12. Equivalent to the sum of protons and neutrons in the nucleus.

The number of molecules in one mole or gram-molecular weight of a substance (6.0221367X1023 molecules/gm-mole).

An abbreviation for British Thermal Unit, a unit of energy defined as the quantity of heat needed to raise the temperature of one pound of water 1°F.

A curved metal tube commonly used in pressure gauges. The tube flexes a known degree as pressure is applied, and that movement is translated as the physical movement of a gauge needle across a scale.