18.2 General terms concerned with measurements

18.2.1 Quantities and units
18.2.2 Measurements
18.2.3 Measurements results
18.2.4 Measuring instruments and their characteristics

18.3.1 Hierarchy of terms used in sampling
18.3.2 General terms
18.3.3 Material units for sampling
18.3.4 Sample types
18.3.5 Sample preparation
18.3.6 Sampling stages

18.4.1 Introduction
18.4.2 Analytical techniques, methods and the measurement process
18.4.3 Performance characteristics of the measurement process

18.4.3.1 Structure of the CMP
18.4.3.2 The observed signal; Calibration function
18.4.3.3 Evaluation function
18.4.3.4 Performance characteristics not specifically related to precision and accuracy
18.4.3.5 Precision and accuracy -related performance characteristics
18.4.3.6 Control and testing of assumptions
18.4.3.7 Detection and quantification capabilities
18.4.3.8 Estimation

18.4.4 Compound CMPs - The interlaboratory environment

18.6 Within laboratory studies (internal quality control)

18.6.1 Terms concerned with internal quality control procedures

18.7.1 Type of study
18.7.2 Operational terms

18.8.1 Terms related to materials
18.8.2 Terms related to measurement and testing
18.8.3 Terms related to certification and issuance of reference materials