GB/T 24890-2010 English PDF

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GB/T 24890-2010: Determination of chloride content for compound fertilizers
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 24890-2010	149	Add to Cart	2 days	Determination of chloride content for compound fertilizers	Valid

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Basic data

Standard ID: GB/T 24890-2010 (GB/T24890-2010)
Description (Translated English): Determination of chloride content for compound fertilizers
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G20
Classification of International Standard: 65.080
Word Count Estimation: 5,536
Date of Issue: 2010-06-30
Date of Implementation: 2011-01-01
Quoted Standard: GB/T 8571; HG/T 2843
Regulation (derived from): National Standard Approval Announcement 2010 No.2 (Total No.157)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the determination of fertilizer (compound fertilizer) in chloride ion content. This standard applies to fertilizer (compound fertilizer) determination of chloride ion content.

GB/T 24890-2010: Determination of chloride content for compound fertilizers

---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 chloride content for compound fertilizers ICS 65.080 G20 National Standards of People's Republic of China Determination of chlorine ion content in compound fertilizer Issued on. 2010-06-30 2011-01-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard is one of compound fertilizer series of standard test methods, which are listed below national standards. --- GB/T 8571-2008 "compound fertilizer laboratory sample preparation"; --- GB/T 8572-2010 "After distillation of total nitrogen content for compound fertilizers - Titrimetric method"; --- GB/T 8573-2010 "Determination of phosphorus content in compound fertilizer quinoline phosphomolybdate gravimetric method"; --- GB/T 8574-2010 "Determination of potassium content for compound fertilizers - Potassium tetraphenylborate gravimetric method"; --- GB/T 8576-2010 "free water for compound fertilizers - Determination vacuum oven method"; --- GB/T 8577-2010 "free water for compound fertilizers - Determination Karl Fischer method"; --- GB/T 24891-2010 "compound fertilizer particle size determination." The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee and soil conditioners Fertilizers (SAC/TC105) centralized. This standard was drafted. National Fertilizer Quality Supervision and Inspection Center (Shanghai), Heilongjiang Province, cereals compound fertilizers Limited. The main drafters of this standard. Li Chongming, Zhu Tao, Su Gang. Determination of chlorine ion content in compound fertilizer

1 Scope

This standard specifies the determination of compound fertilizers (compound fertilizer) Chlorine ion content. This standard applies to compound fertilizers (compound fertilizer) Determination of chloride ion content.

2 Normative references

The 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. Preparation of GB/T 8571 compound fertilizer laboratory samples HG/T 2843 fertilizer products for chemical analysis commonly used standard titration solution, standard solution, reagent solution and indicator solution Principle 3 In the acidic sample solution, adding an excess of silver nitrate solution, converted into the chlorine ion precipitation of silver chloride, dibutyl phthalate Ester wrapped precipitate with ammonium ferric sulfate as indicator, titrate with ammonium thiocyanate standard solution of silver nitrate remaining.

4 Reagents and materials

This method is used in the reagent solution and water, in the specifications and method of preparation is not specified, it shall comply with the provisions of HG/T 2843's. 4.1 dibutyl phthalate; 4.2 nitric acid solution. 11; 4.3 silver nitrate solution [c (AgNO3) = 0.05mol/L]. Weigh 8.7g of silver nitrate, dissolved in water and diluted to 1000mL, storage In a brown bottle; 4.4 Chloride standard solution (1mg/mL). Weigh accurately 1.6487g by 270 ℃ ~ 300 ℃ drying to constant reference mass chlorination Sodium in a beaker, dissolved in water and transferred to 1000mL volumetric flask, dilute to volume, mix and store in a plastic bottle. This solution containing 1mL 1mg chloride (of Cl-); 4.5 ferric ammonium sulfate indicator solution (80g/L). dissolve 8.0g of ammonium ferric sulfate in 75mL of water, filtered, add a few drops of sulfuric acid, so that the disappearance of brown, thin Diluted to 100mL; 4.6 ammonium thiocyanate standard titration solution [c (NH4SCN) = 0.05mol/L]. weigh 3.8g ammonium thiocyanate is dissolved in water and diluted to 1000mL. Calibration methods are as follows. Imbibe 25.0mL standard solution of chloride in 250mL conical flask, 5mL nitric acid solution and 25.0mL silver nitrate solution, shaken to precipitate stratification, dibutyl phthalate was added 5mL, shaking moment. Water was added, the solution overall Area of \u200b\u200babout 100mL, was added 2mL ferric ammonium sulfate indicator solution, titration with ammonium thiocyanate standard solution of silver nitrate titration remaining, to appear light orange Red or pale brick red so far. At the same time a blank test. Ammonium thiocyanate standard titration solution concentration c (mol/L) according to equation (1). c = m10.03545 × (V0-V1) (1) Where. Value V0 --- blank test (25.0mL silver nitrate solution) volume of ammonium thiocyanate standard titration solution consumed, in units of milli L (mL of); ......

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