Detail of GB/T 6680-2003

Introduction of GB/T 6680-2003

General Principles for Sampling Liquid Chemical Products 1. Scope The standard specifies the terms and definitions, basic requirements, sampling plan and equipment, and operating method for sampling liquid chemical products. The standard is applicable to the sampling of liquid chemical products with temperature not exceeding 100℃, and pressure at or near normal pressure; while it inapplicable to the sampling of those liquid chemical products with special requirements in their standard specifications. 2. Normative References The following standards contain the provisions which, through reference in this text, constitute the provisions of the standard. For dated reference, subsequent amendments to, or revisions of, any of these publications do not apply. For undated reference, the latest edition of the normative document referred to applies. GB/T 6678-2003 General Principles for Sampling Chemical Products GB/T 6679 General Principles for Sampling Solid Chemical Products GB/T 6681 General Principles for Sampling Gaseous Chemical Products GB/T 3723-1999 Sampling of Chemical Products for Industrial Use - Safety in Sampling (IDT ISO 3165: 1976) 3. Term and Definition The following terms and definitions are applicable to the standard. Spot sample Spot sample indicates certain amount or size of samples collected from special parts of material or collected at intervals of the material flow, which represent partial or instant samples. See Fig.1. Surface sample Surface sample indicate the sample collected from material surface, for the purpose of obtaining surface data of the material. See Fig.1. Bottom sample Bottom sample indicates the sample collected from material bottom, for the purpose of obtaining the bottom data of the material. See Fig.1 Upper sample Upper sample indicates a type of spot sample collected at the depth of certain material volume (like 1/6 total volume). See Fig.1. Middle sample Middle sample indicates the spot sample collected at the depth of half material volume. See Fig.1. Lower sample Lower sample indicates the spot sample collected at the depth of certain material volume (like 5/6 total volume). See Fig.1. Full level sample Full level sample indicates the sample collected from full level of the container. See Fig.1. Average sample Average sample indicates the sample compounded with a group of spot samples to a scale. See Fig.1. Composite sample Composite sample indicates the sample collected from blending material by random sampling in container. Sample container Sample container indicates the container used for sample preservation and delivering. Sampling device Sampling device indicates the portable or fixed devices for sampling material.

Contents of GB/T 6680-2003