GB/T 8570.3-2010 English PDF

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GB/T 8570.3-2010: Determination of liquefied anhydrous ammonia -- Part 3: Residue content -- Gravimetric method
Status: Valid

GB/T 8570.3: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 8570.3-2010	139	Add to Cart	3 days	Determination of liquefied anhydrous ammonia -- Part 3: Residue content -- Gravimetric method	Valid
GB/T 8570.3-1988	199	Add to Cart	2 days	Liquefied anhydrous ammonia--Determination of residue content--Gravimetric method	Obsolete

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Basic data

Standard ID: GB/T 8570.3-2010 (GB/T8570.3-2010)
Description (Translated English): Determination of liquefied anhydrous ammonia -- Part 3: Residue content -- Gravimetric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G10
Classification of International Standard: 71.040.40
Word Count Estimation: 6,629
Date of Issue: 2010-09-26
Date of Implementation: 2011-03-01
Older Standard (superseded by this standard): GB/T 8570.3-1988
Quoted Standard: GB/T 8570.1-2008; HG/T 2843
Regulation (derived from): National Standard Approval Announcement 2010 No.6 (Total No.161)
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 weight content of the residual method for the determination of liquid anhydrous ammonia (ammonia). Warning: The use of this standard personnel practices should be implemented in a regular room to work, the marked increase does not indicate that all possible security problems, the user has the responsibility to take appropriate safety and health practices to ensure compliance with relevant laws and regulations Wells State conditions, highly toxic liquid anhydrous ammonia to the skin, mucosa and eye corrosive, exposure can cause severe burns, the operation should be adequate protection, this standard applies to the residual content of not less than 0. 02% of the product, for the determination of residues arbitration content. NOTE: If the lower limit of the content of the residual standard method, the mass fraction is reported as < 0. 02%.

GB/T 8570.3-2010: Determination of liquefied anhydrous ammonia -- Part 3: Residue content -- Gravimetric method

---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 liquefied anhydrous ammonia .Part 3. Residue content.Gravimetric method ICS 71.040.40 G10 National Standards of People's Republic of China Replace GB/T 8570.3-1988 Determination of liquid anhydrous ammonia Part 3. Residue content weight method Determination ofliquefiedanhydrousammonia- Part 3. Residuecontent-Gravimetricmethod 2010-09-26 release 2011-03-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released

Foreword

GB/T 8570 "Determination of liquid anhydrous ammonia method" is divided into seven parts. - Part 1. Adoption of laboratory samples; - Part 2. Ammonia content; - Part 3. Residue content weight method; - Part 4. Residual content volumetric method; - Part 5. Moisture Fisher Fischer; - Part 6. Oil content gravimetric and infrared absorption spectroscopy; - Part 7. Iron content - phenanthroline spectrophotometric method. This part is part 3 of GB/T 8570. This part of the replacement of GB/T 8570.3-1988 "liquid anhydrous ammonia residue content determination of weight method." The main differences between this edition and the previous edition are. Preparation and calibration of reagent solutions, standard titration solutions, etc. Execution of HG/T 2843 standards; --- increase the contents of the security warning; - standardize the standard format according to the new requirements. This section is proposed by the China Petroleum and Chemical Industry Association. This section is under the jurisdiction of the National Technical Committee on Standardization of Fertilizers and Soil Conditioners (SAC/TC105). This part of the drafting unit. the National Fertilizer Quality Supervision and Inspection Center (Shanghai), the Eastern Airlines Co., Ltd. Security Department. The main drafters of this section. Wu Juan, Feng Zhuo, Ji Min, Chen Jie. This part was first published in 1988. Determination of liquid anhydrous ammonia Part 3. Residue content weight method WARNING - Personnel using this standard should have practical experience in formal laboratory work. This standard does not indicate all possible security questions question. It is the responsibility of the user to take appropriate safety and health measures and to ensure compliance with the conditions of the relevant national laws. Liquid anhydrous ammonia high Toxic to the skin, mucous membranes and eyes are corrosive, contact can cause severe burns. Operation should be properly protected.

1 Scope

This standard specifies the determination of liquid anhydrous ammonia (liquid ammonia) residue by gravimetric method. This standard applies to products with a residue content of not less than 0.02%, and an arbitration method for determining the content of residues. Note. If the residue content is lower than the lower limit of the standard measurement method, the report is the mass fraction < 0.02%.

2 normative reference documents

The terms of this document are the terms of this part by reference to this part of GB/T 8570. Any reference to the date of the text , All subsequent amendments (excluding corrigenda) or revisions do not apply to this part, however, encouragement under this section The parties to the agreement study whether the latest version of these documents can be used. For undated references, the latest edition of this document applies section. GB/T 8570.1-2008 Methods for the determination of liquid anhydrous ammonia - Part 1. Adoption of laboratory samples HG/T 2843 chemical analysis of chemical fertilizers commonly used standard titration solution, standard solution, reagent solution and indicator solution

3 principle

After evaporation of the liquid ammonia sample at room temperature, the evaporation residue was weighed and the residue was titrated in a standard solution of sulfuric acid in the presence of an indicator Of the ammonia, the amount of residue obtained by subtracting the measured ammonia content from the residue of the residue, and obtaining the residue content.

4 reagents and materials

The reagents, solutions and water used in this part shall comply with the requirements of HG/T 2843 when not specified and formulated. 4.1 sulfuric acid solution. about 10%; 4.2 sulfuric acid standard titration solution, c (12H2SO4 ) = 0.1 mol/L; 4.3 methyl red indicator solution. 1g/L; 4.4 Refrigerants. solid carbon dioxide (dry ice) and industrial alcohol mixture, the cooling temperature -35 ℃ ~ -40 ℃; 4.5 grease, lubricating glass piston.

5 instruments

5.1 General laboratory equipment. 5.2 sample sampling device, see Figure 1. 5.2.1 glass tube. the total volume of about 150mL, 100mL engraved with marking, No. 29 internal standard grinding with the corresponding external standard grinding mouth Glass plug, so that one of the pipe connected to the three-way piston 3, the other branch with two 1000mL conical bottles Ⅰ and Ⅱ in series. Thus, in the assembled instrument, the test tube can be connected with two three-way pistons 3 and 4, respectively, and liquid ammonia sampling cylinders and two conical bottles Ⅰ, Ⅱ connection. The glass piston is lubricated with silicone grease or made of polytetrafluoroethylene. ......

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