GB/T 17481-2025 English PDFGB/T 17481: Historical versions
Basic dataStandard ID: GB/T 17481-2025 (GB/T17481-2025)Description (Translated English): Determination of choline chloride in feed additive premix Sector / Industry: National Standard (Recommended) Date of Implementation: 2026-03-01 Older Standard (superseded by this standard): GB/T 17481-2008 GB/T 17481-2008: Determination of choline chloride in premix---This is a DRAFT version for illustration, not a final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.Determination of choline choride in premix ICS 65.120 B46 National Standards of People's Republic of China Replacing GB/T 17481-1998 Determination of choline chloride premix Posted 2008-04-09 2008-07-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordThis standard is GB/T 17481-1998 "Determination of choline chloride premix spectrophotometry" revision. This standard replaces GB/T 17481-1998. This standard and GB/T 17481-1998 compared to major differences are. --- Complements the first ion chromatography assay (Arbitration Law), Ray's original standard as the second salt spectrophotometric assay; --- Metrohm ion chromatography main reference document to develop the scope of the method, the sample weight, sample extraction conditions were improved; --- Reinecke salt spectrophotometric method to increase the "detection limit." Appendix A of this standard is an informative annex. This standard by the National Standardization Technical Committee Feed Industry and focal points. This standard was drafted. China Feed Industry Association, the National Feed Quality Supervision and Inspection Center (Wuhan), Shanghai Feed Industry Association. The main drafters of this standard. Liu Xiaomin, Xinsheng Peng, Su Sheng Lan, Mao Feng Xi, Yang Xiankui. This standard replaces the standards previously issued as follows. --- GB/T 17481-1998. Determination of choline chloride premix1 ScopeThis standard specifies the test methods and ion chromatography Reinecke salt spectrophotometric test methods premix choline chloride. This standard applies to the determination of choline chloride premix, ion chromatography test method arbitration law. Quantitative limit of ion chromatography 0.05g/kg; Reinecke salt spectrophotometric quantitation limit of 2.5g/kg.2 Normative referencesThe following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-1992, neq ISO 3696. 1987) GB/T 14699.1 feed sampling (GB/T 14699.1-2005, ISO 6497.2002, IDT) GB/T 20195 preparation of animal feed samples (GB/T 20195-2006, ISO 6498.1998, IDT) 3 Method 1. Test method for ion chromatography (Arbitration Act) 3.1 Principle Choline chloride with pure water sample was extracted using cation exchange chromatography - conductivity detector, external standard. 3.2 Reagents and materials Unless otherwise indicated in the analysis using only recognized as analytical reagents. 3.2.1 Water. GB/T 6682, level. 3.2.2 acetone. chromatography. 3.2.3 pyrimidine-dicarboxylic acid (C7H5NO4). 3.2.4 Mobile phase. 0.6000g Citric acid + 0.1250g pyrimidine-dicarboxylic 300mL water was added, dissolved by heating, 150mL added after cooling Acetone volume to 1000mL volumetric flask. 3.2.5 choline chloride standard solution 3.2.5.1 choline chloride stock standard solution Weigh choline chloride standard (content ≥99.5%) 0.1005g, set 100mL flask, dissolved in water, dilute to the mark Degree, shake a concentration of 1000μg/mL, stored in the refrigerator at 4 ℃, valid for one month. 3.2.5.2 choline chloride standard solution Pipette accurately the amount of choline chloride were certain stock solution (3.2.5.1), diluted with water to a concentration of 25.0μg/mL standard working solution Above solution should be formulated and day use. 3.3 instruments and equipment 3.3.1 constant temperature water bath. 3.3.2 Oscillator. reciprocating. 3.3.3 chromatograph. a weak acid cation exchange column distribution conductivity detector. 3.3.4 commonly used laboratory glassware. 3.4 Preparation of the sample According to GB/T 14699.1 sampling, according to GB/T 20195 specimen preparation, grinding, by 0.42mm aperture sieve, homogenized and filled into the sealed container Protected from light and stored at low temperature. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 17481-2025_English be delivered?Answer: Upon your order, we will start to translate GB/T 17481-2025_English as soon as possible, and keep you informed of the progress. 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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 17481-2025?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 17481-2025 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
