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Cite this document
Each method of analysis, determination, or measurement requires a statement of the precision attainable by the method. For Committee D-19 methods, this statement must conform with the definition of precision in the Definitions of Terms Relating to Industrial Water and Industrial Waste Water (ASTM Designation: D 1129). This means that the task group proposing a new or revised method must carry out suitably planned trials from which the precision (over-all, estimated standard deviation) of the method can be calculated. This method provides general guidance to task groups in planning and conducting such a determination of precision. Distribution of identical, stable samples is essential for this general plan; suggestions for methods for which such samples are impossible are given at the end of this procedure.