GB/T 42363-2023 English PDFUS$264.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 42363-2023: Soil quality - Pretreatment of samples for physico-chemical analysis Status: Valid
Basic dataStandard ID: GB/T 42363-2023 (GB/T42363-2023)Description (Translated English): Soil quality - Pretreatment of samples for physico-chemical analysis Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: B10 Classification of International Standard: 13.080.01 Word Count Estimation: 14,145 Date of Issue: 2023-03-17 Date of Implementation: 2023-07-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 42363-2023: Soil quality - Pretreatment of samples for physico-chemical analysis---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.ICS13:080:01 CCSB10 National Standards of People's Republic of China GB/T 42363-2023/ISO 11464:2006 Soil Quality Pretreatment of Soil Physical and Chemical Analysis Samples (ISO 11464:2006, IDT) Released on 2023-03-17 2023-07-01 implementation State Administration for Market Regulation Released by the National Standardization Management Committee table of contentsPreface I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Principle 1 5 Instruments and equipment 2 6 Process 4 6:1 Overview 4 6:2 Sample description 4 6:3 Drying 4 6:3:1 Overview 4 6:3:2 Air drying at room temperature 4 6:3:3 Oven drying 4 6:3:4 Freeze drying 4 6:4 Crushing and removal of large particles 5 6:4:1 Remove foreign matter and weigh 5 6:4:2 Crushing 5 6:5 Sampling 5 6:5:1 Overview 5 6:5:2 Manual sampling (quarter method) 5 6:5:3 Sample divider 5 6:5:4 Mechanical sub-sample division 6 6:6 Grinding 6 7 Test report 6 Appendix A (Informative) Instrument and Equipment Example 7 Reference 10forewordThis document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents" drafting: This document identically adopts ISO 11464:2006 "Pretreatment of soil physical and chemical analysis samples for soil quality": A chapter "Terms and Definitions" has been added to this document: The following minimal editorial changes have been made to this document: ---Since "5:3 and 5:4" mentioned in 5:1 of ISO 11464:2006 should have been "5:3, 5:4 and 5:5", so in 6:1 of this document Adjust accordingly to "6:3, 6:4 and 6:5"; ---Since the "4:6" mentioned in 5:4:2 and 5:5:2 of ISO 11464:2006 should have been "4:5", the relative Should be adjusted to "5:5"; ---Since the "4:9" mentioned in 5:6 of ISO 11464:2006 should have been "4:8", the corresponding adjustment in 6:6 of this document is "see 5:8": Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents: This document was proposed by the Ministry of Agriculture and Rural Affairs of the People's Republic of China: This document is under the jurisdiction of the National Soil Quality Standardization Technical Committee (SAC/TC404): This document was drafted by: Nanjing Institute of Soil Science, Chinese Academy of Sciences, Jiangsu Provincial Institute of Quality and Standardization, Ecological Environment, Chinese Academy of Sciences Center, Chinese Academy of Environmental Sciences, Shanghai Chenshan Botanical Garden: The main drafters of this document: Chen Meijun, Duan Zengqiang, Hou Yueli, Shen Renfang, Zhu Yongguan, Feng Youzhi, Liu Li, Fang Hailan: Soil Quality Pretreatment of Soil Physical and Chemical Analysis Samples1 ScopeThis document specifies the pretreatment requirements for soil samples for the analysis of stable and non-volatile physical and chemical indicators: The 5 preprocessing described in this document The processes are drying, crushing, sieving, sampling and grinding: When the preprocessing process in this document affects the measurement results, it is not applicable: This document also does not apply to the determination of volatile compounds sample: When other pretreatment methods are required, they are usually explained in the physical and chemical analysis method standards:2 Normative referencesThe contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document: ISO 565 Basic dimensions of test sieves of woven wire mesh, perforated plate and electroformed sheet sieves (Testsieves-Metal Note: The basic dimensions of GB/T 6005-2008 test sieve wire mesh, perforated plate and electroformed sheet sieve (ISO 565:1990, MOD) ISO 10381-8 Soil quality sampling Part 8: Guidelines for collection of air-dried soil samples (Soilquality-Sampling-Part 8:3 Terms and DefinitionsThis document does not have terms and definitions that need to be defined:4 principlesAir-dry the soil samples directly, or dry in a drying oven at a temperature not exceeding 40°C, or freeze-dry (see 6:3): if necessary If necessary, crush the soil sample when it is wet and brittle, and repeat the crushing process after drying (see 6:4): The soil was sieved to a particle size smaller than The 2mm part is divided into several parts by mechanical or manual means, and analyzed as representative sub-samples (see 6:5): For a small amount of sample (< 2g) is used for analysis, it is necessary to use soil samples with a particle size of less than 2mm (see 6:6), and the processing flow is shown in Figure 1: Soil samples were dried in a forced air drying oven at 40 °C, since rapid drying can reduce changes caused by microbial activity, so Therefore, this method is more recommended than air drying at room temperature: Attention should be paid to the effect of different pretreatment processes on some properties of the soil: A mesh screen with a mesh size of 2 mm is usually used: However, before pretreatment begins, it should be confirmed whether the subsequent analytical method requires To use another mesh size: NOTE: Soil samples stored for long periods of time (including those stored as-is, air-dried at room temperature, refrigerated, or stored away from light) can affect many parameters of the soil, especially Solubility of inorganic and organic components: See reference [1]: Special measures should usually be taken for the handling of contaminated soil samples: Take care to avoid contact with skin and special measures should be taken when drying (exhaust ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 42363-2023_English be delivered?Answer: Upon your order, we will start to translate GB/T 42363-2023_English as soon as possible, and keep you informed of the progress. 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