GB/T 32718-2024 English PDFUS$299.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 32718-2024: Determination of defoliant residues in cotton fibers Status: Valid GB/T 32718: Historical versions
Basic dataStandard ID: GB/T 32718-2024 (GB/T32718-2024)Description (Translated English): Determination of defoliant residues in cotton fibers Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: W10 Classification of International Standard: 59.060.10 Word Count Estimation: 14,122 Date of Issue: 2024-03-15 Date of Implementation: 2024-10-01 Older Standard (superseded by this standard): GB/T 32718-2016 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 32718-2024: Determination of defoliant residues in cotton fibers---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.ICS 59.060.10 CCS W10 National Standards of People's Republic of China Replaces GB/T 32718-2016 Determination of Defoliant Residues in Cotton Fiber Released on 2024-03-15 2024-10-01 Implementation State Administration for Market Regulation The National Standardization Administration issued ForewordThis 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 replaces GB/T 32718-2016 "Determination of Thidiazuron Residues in Cotton". Compared with GB/T 32718-2016, In addition to structural adjustments and editorial changes, the main technical changes are as follows. a) The scope was changed to add the determination of residues of five defoliants. thiamethoxam, diuron, defoliant, ethephon and cyproconazole (see Chapter 1, Chapter 1 of the.2016 edition); b) Added sampling requirements (see 7.1); c) The sample pretreatment method has been changed (see 7.2, 7.1, 7.2, and 7.3 of the.2016 edition); d) Deleted the HPLC/DAD analysis method (see 7.4 of the.2016 edition); e) Added HPLC-MS/MS analysis method (see 7.3, 7.4); f) Added the types of defoliant substances (see Appendix A); g) Added sampling requirements (see Appendix B). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document is proposed and coordinated by the National Fiber Standardization Technical Committee (SAC/TC513). This document was drafted by. China Fiber Quality Monitoring Center, Shanghai Quality Supervision and Inspection Technology Research Institute, Sichuan Fiber Inspection Bureau, Beijing Yafen Technology Co., Ltd., Suzhou Huahao Textile Co., Ltd., Aksu Regional Inspection and Testing Center Fiber Inspection Institute, and Bozhou Fiber Inspection Institute. The main drafters of this document are. Zhou Shuo, Zhao Hailang, Wang Lei, Pang Ning, Wang Xiaohui, Zheng Jiahui, Li Wei, Sun Jin, Yan Xincheng, Jiang Jinping, Wang Jie, Li Aihua, Wang Huiping, Ren Meng. The previous versions of this document and the documents it replaces are as follows. ---First published in.2016 as GB/T 32718-2016; ---This is the first revision. Determination of Defoliant Residues in Cotton Fiber Warning---People who use this document should have experience in chemical laboratory work. This document does not address all possible safety issues. The user is responsible for taking appropriate safety and health measures and ensuring compliance with the conditions stipulated by relevant national laws and regulations.1 ScopeThis document describes the determination of thidiazuron, thiabendazole, and dimethoate in cotton fiber using high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). Test methods for residual amounts of defoliants such as chloranil, defoliant, ethephon, and cyproconazole. This document is applicable to the determination of defoliant residues in cotton fibers.2 Normative referencesThe contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 6682 Specifications and test methods for water used in analytical laboratories3 Terms and definitionsThe following terms and definitions apply to this document. 3.1 Defoliant Before picking cotton, spray the cotton with a pesticide that causes the cotton leaves to fall off. Note. Including thidiazuron, thiamethoxam, diuron, defoliant, ethephon, cyproconazole, etc.4 PrincipleThe defoliants in the samples were extracted by ultrasonic method using a mixed solvent of acetonitrile and water. The extract was filtered through a filter membrane and analyzed by HPLC-MS/MS. The determination was carried out and the quantification was performed by external standard method.5 ReagentsUnless otherwise specified, all reagents used in the analysis were analytical grade and grade 2 water as specified in GB/T 6682. 5.1 Acetonitrile, chromatographic grade. 5.2 Acetonitrile-water mixed solution. prepared in a volume ratio of 1.1. 5.3 Ammonia water. 0.1%. 5.4 Formic acid. 0.1%. 5.5 Preparation of defoliant standard solution. 5.5.1 Single component standard stock solution. The purity of the six defoliants is ≥95%, which complies with the requirements of Appendix A. ...... |
