| 1.96 | selectivity of a measuring system | ||
| selectivity | |||
| 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 Jaffé 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-substance 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 2: | In chemistry, the measured quantities often involve different components in the system undergoing measurement and these quantities are not necessarily of the same kind. | ||
| Note 3: | In chemistry, selectivity of a measuring system is usually obtained for quantities with selected components in concentrations within stated intervals. | ||
| Source: [VIM 4.13] with Examples 2 and 3 omitted, an addition to Example 5 and Notes 1 and 4 omitted. See also analytical selectivity. | |||
| 1.96 | selectivity of a measuring system | ||
| selectivity | |||
| 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 Jaffé 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-substance 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 2: | In chemistry, the measured quantities often involve different components in the system undergoing measurement and these quantities are not necessarily of the same kind. | ||
| Note 3: | In chemistry, selectivity of a measuring system is usually obtained for quantities with selected components in concentrations within stated intervals. | ||
| Source: [VIM 4.13] with Examples 2 and 3 omitted, an addition to Example 5 and Notes 1 and 4 omitted. See also analytical selectivity. | |||