ქიმიის ტერმინთა განმარტებითი ლექსიკონი

Property of a measuring system, used with a specified measurement procedure, whereby it provides
measured quantity values for one or more measurands such that the values of each measurand are
independent of other measurands or other quantities in the phenomenon, body, or substance being
investigated.

Example 1: Capability of a measuring system including a mass spectrometer to measure the ion
current ratio generated by two specified compounds without disturbance by other specified sources
of electric current.

Example 4: Capability of a measuring system for ionizing radiation to respond to a given radiation to
be measured in the presence of concomitant radiation.

Example 5: Capability of a measuring system to measure the amount-of-substance concentration of
creatininium in blood plasma by a Jaffe procedure without being influenced by the glucose,
urate, ketone, and protein concentrations. In analytical chemistry these latter substances are often
termed as potential interferents and their influence is termed as interference.

Example 6: Capability of a mass spectrometer to measure the amount-of-sub- stance abundance of
the ²⁸Si isotope and of the ³⁰Si isotope in silicon from a geological deposit without influence between
the two, or from the ²⁹Si isotope.

Note 1: In chemistry, the measured quantities often involve different com- ponents in the system
undergoing measurement and these quantities are not necessarily of the same kind.

Note 2: In chemistry, selectivity of a measuring system is usually obtained for quantities with
selected components in concentrations within stated intervals.