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Significance and Use
4.1 This guide discusses options for taking a subsample from a sample submitted to a laboratory. If followed, it will minimize the bias and variance of the characteristic of interest of the laboratory sample prior to analysis.
4.3 This guide is intended for use in the laboratory to take a representative subsample or specimen of the whole field sample for direct analysis or sample preparation for analysis. It is intended for field personnel, data users, laboratory sample reception personnel, analysts, and managers.
4.4 To obtain a representative subsample, layer analysis, grinding, mixing, and changing the physical state such as digesting, drying, melting or freezing may be required. This guide considers cone and quartering, riffle splitting, and particle size reduction.
1.1 This guide covers common techniques for obtaining representative subsamples from a sample received at a laboratory for analysis. These samples may include solids, sludges, liquids, or multilayered liquids (with or without solids).
1.2 The procedures and techniques discussed in this guide depend upon the sample matrix, the type of sample preparation and analysis performed, the characteristic(s) of interest, and the project specific instructions or data quality objectives.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C702 Practice for Reducing Samples of Aggregate to Testing Size
C859 Terminology Relating to Nuclear Materials
D346 Practice for Collection and Preparation of Coke Samples for Laboratory Analysis
D2234/D2234M Practice for Collection of a Gross Sample of Coal
D4547 Guide for Sampling Waste and Soils for Volatile Organic Compounds
D4823 Guide for Core Sampling Submerged, Unconsolidated Sediments
D5681 Terminology for Waste and Waste Management
D5743 Practice for Sampling Single or Multilayered Liquids, With or Without Solids, in Drums or Similar Containers
D5792 Practice for Generation of Environmental Data Related to Waste Management Activities: Development of Data Quality Objectives
D5956 Guide for Sampling Strategies for Heterogeneous Wastes
D6051 Guide for Composite Sampling and Field Subsampling for Environmental Waste Management Activities
ICS Number Code 13.030.99 (Other standards related to wastes)
UNSPSC Code 77100000(Environmental management)