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GB 10736-2008 English PDF

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GB 10736-2008: Working chemical -- Potassium chloride
Status: Valid

GB 10736: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB 10736-2008	English	169	Add to Cart	3 days [Need to translate]	Working chemical -- Potassium chloride	Valid	GB 10736-2008
GB 10736-1989	English	199	Add to Cart	2 days [Need to translate]	Working chemical--Potassium chloride	Obsolete	GB 10736-1989

PDF similar to GB 10736-2008

Standard similar to GB 10736-2008

GB/T 9722 HG/T 3489 GB/T 9741 GB 10731 GB 10732 GB 10730

Basic data

Standard ID	GB 10736-2008 (GB10736-2008)
Description (Translated English)	Working chemical -- Potassium chloride
Sector / Industry	National Standard
Classification of Chinese Standard	G61
Classification of International Standard	71.040.30
Word Count Estimation	7,725
Date of Issue	2008-06-18
Date of Implementation	2009-06-01
Older Standard (superseded by this standard)	GB 10736-1989
Regulation (derived from)	Announcement of Newly Approved National Standards No. 10 of 2008 (total 123)
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 Chinese standard specifies the Working chemical properties of potassium chloride, specifications, testing, inspection and marking and packaging rules. This standard applies to Working chemical titration with potassium chloride test.

GB 10736-2008: Working chemical -- Potassium chloride

---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.
Working chemical.Potassium chloride ICS 71.040.30 G61 National Standards of People's Republic of China Replacing GB 10736-1989 Job reference potassium chloride reagent Posted 2008-06-18 2009-06-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

The standard Chapter 4, Section 5.3.1,5.3.2 article are mandatory, other provisions are recommended. This standard replaces GB 10736-1989 "job reference reagent (capacity) potassium chloride", the main changes compared with the GB 10736-1989 as follows. --- Standard name to "work reference reagent potassium chloride"; --- Modify the Content Measurement (1989 version 4.1, this version 5.3). --- PH value, water-insoluble, sulfate, total nitrogen, phosphate, iron, heavy use of chemical reagents seven common method for determining (1989 4.2,4.3.2,4.3.5,4.3.6,4.3.7,4.3.11,4.3.13 version, this version of 5.4,5 .6,5.9,5.10,5.11,5.15, 5.17). The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee Chemistry Chemicals Branch (SAC/TC63/SC3) centralized. This standard is drafted by. Beijing Institute of chemical reagents. The main drafters of this standard. Han Baoying, strong Jing Lin. This standard replaces the standards previously issued as follows. --- GB 10736-1977, GB 10736-1989. Job reference potassium chloride reagent Molecular formula. KCl Molecular Weight. 74.551 (according to 2005 international relative atomic mass).

1 Scope

This standard specifies the job reference potassium chloride reagent traits, specifications, testing, packaging and inspection rules and signs. This standard applies to titration analysis work reference potassium chloride reagent test.

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 601 chemical reagent standard titration solution GB/T 602 Determination of impurities in chemical reagents prepared standard solution (GB/T 602-2002, ISO 6353-1. 1982, NEQ) with GB/T 603 chemical reagent test method Preparations of articles (GB/T 603-2002, ISO 6353-1 with. 1982, NEQ) GB/T 609 chemical reagent - General method for determination of total nitrogen (GB/T 609-2006, ISO 6353-1. 1982, NEQ) GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD) GB/T 9723-2007 Chemicals flame atomic absorption spectrometry General GB/T 9724 General rule for determination of pH chemical reagent (GB/T 9724-2007, ISO 6353-1. 1982, NEQ) GB/T 9727 General method for the determination of phosphate chemical reagent (GB/T 9727-2007, ISO 6353-1. 1982, NEQ) GB/T 9728 General method for determination of chemical reagents sulfate (GB/T 9728-2007, ISO 6353-1. 1982, NEQ) GB/T 9735 General method for determination of heavy metals Chemicals (GB/T 9735-2008, ISO 6353-1. 1982, NEQ) GB/T 9738 Chemicals water insoluble determination General method (GB/T 9738-2008, ISO 6353-1. 1982, NEQ) GB/T 9739 General method for determination of iron chemical reagents (GB/T 9739-2006, ISO 6353-1. 1982, NEQ) Determination of working reference reagent content GB 10737 General Weighing potentiometric titration GB 15346 chemical reagent packaging and marking HG/T 3484 standard chemical reagents glass emulsion and clarity standards HG/T 3921 Chemicals sampling and acceptance rules

3 Characters

This reagent is a white crystalline powder, soluble in water, almost insoluble in ethanol.

4 Specification

Potassium chloride as shown in Table 1. Table 1 Name reference work Content (KCl), /% 99.95 ~ 100.05 pH value (50g/L, 25 ℃) 5.5 ~ 8.0 Clarity test, number ≤2 Table 1 (continued) Name reference work Water-insoluble, /% ≤0.003 Iodide (I), /% ≤0.001 Bromide (Br), /% ≤0.02 Sulphate (SO4), /% ≤0.001 Total nitrogen (N), /% ≤0.0005 Phosphate (PO4), /% ≤0.0005 Sodium (Na), /% ≤0.02 Magnesium (Mg), /% ≤0.0005 Calcium (Ca), /% ≤0.001 Iron (Fe), /% ≤0.0001 Barium (Ba), /% ≤0.001 Heavy metals (Pb), /% ≤0.0005

5 Test

5.1 Warning Reagents used in this test method are toxic or corrosive, some of the testing process can lead to dangerous situations, the operator should take Appropriate safety and health practices. 5.2 General Provisions Unless specified otherwise in this chapter, the use of standard titration solution, standard solution, preparations and products, according to GB/T 601, GB/T 602, Regulations preparation, test water should be consistent with GB/T 6682 specifications in three water samples according to precise weighing 0.01g, the use of GB/T 603's Solution "%" are represented by the mass fraction. 5.3 Content Measured according to the provisions of GB 10737. 5.3.1 standard silver nitrate titration solution of potassium chloride titration Standards Weigh 0.2g at 500 ℃ ~ 600 ℃ to constant burning substance potassium chloride standard, accurate to 0.00001g. Placed in a reaction flask, Add water to dissolve 70mL, 10mL add starch indicator solution (10g/L), sulfur ion selective electrode (or silver electrode) as the indicator electrode with a 217 type Double salt bridge saturated calomel electrode (outer casing salt bridge built saturated ammonium nitrate or potassium nitrate solution) as a reference electrode. Titration with standard silver nitrate solution [Ba (AgNO3) = 0.1mol/L] titrated to the end point. Weighing standard silver nitrate titration solution should be accurate to 0.0001g. Determination 5.3.2 Content 5.3.1 Determination of the same, instead of the standard sample material. Potassium chloride concentration, the value in the "%" means, according to equation (1). (1) Where. B --- material content standard potassium chloride (mass fraction), the value to "%" means; Determined according to the provisions of GB/T 9724's. 5.5 Clarity test Clarity Standard No. 2 Weigh 25g sample was dissolved in 100mL of water, turbidity is not greater than HG/T 3484 stipulated. 5.6 Water insoluble matter Weigh 50g sample was dissolved in 200mL of water in the water bath for 1h after, according to the provisions of GB/T 9738 Determination. 5.7 iodide Weigh 11g sample was dissolved in 50mL of water and transferred to a separatory funnel, add 2mL 5mL hydrochloric acid and ferric chloride solution (100g/L), shake Uniform, placed 5min. Add 10mL of carbon tetrachloride, shaking 1min, place stratification, carbon tetrachloride layer was collected in colorimetric tubes, and extracted with carbon tetrachloride Take twice 5mL, incorporated into the colorimetric tube (reservations aqueous sample). The organic layer was purple No deeper than the standard colorimetric solution. Preparation of standard color solution is to take the ratio of 1g sample and containing 0.1mg of iodine (I) and a standard solution containing 2.0mg of bromine (Br) standard solution, The same treatment simultaneously with the sample (standard water retention). 5.8 bromide The aqueous sample 5.7 separatory funnel and extracted with carbon tetrachloride retained twice 5mL, discard the carbon tetrachloride, added to the solution 35mL sulfuric acid solution (1 + 1) and 10mL chromic acid solution (100g/L), shake for 5min. Add 10mL of carbon tetrachloride, shaking 1min, place stratification. Carbon tetrachloride layer was collected in colorimetric tube, and then 5mL carbon tetrachloride extraction, into a colorimetric tube. The organic layer was Yellow No deeper than the standard colorimetric solution. Preparation of standard color solution is to take the ratio of the standard solution 5.7 with an aqueous solution of 5.8 to retain the specimen while the same treatment. 5.9 sulfate Weigh 1g sample was dissolved in 20mL of water, add 0.5mL hydrochloric acid solution (20%) after acidification, according to the provisions of GB/T 9728 Determination. The turbidity of the solution was not greater than the standard turbidity solution. Standard preparation turbid solution is to take the ratio of 0.01mg containing sulfate (SO4) standard solution, and treated in the same sample at the same time. Total nitrogen content of 5.10 Weigh 2g sample was dissolved in water and diluted to 140mL, determined according to the provisions of GB/T 609's. The yellow solution can not be deeper than the standard ratio Color solution. Preparation of the standard developing solution containing 0.01mg ratio is taken of nitrogen (N) standard solution, the same treatment simultaneously with the sample. 5.11 Phosphate Weigh 1g sample was dissolved in an appropriate amount of water, add 2 drops of saturated 2,4-dinitrophenol indicator solution, a solution of nitric acid solution (13%) just to yellow Disappeared after diluted to 10mL, according to the provisions of GB/T 9727 Determination. The organic layer was blue can not be deeper than the standard colorimetric solution. Preparation of the standard developing solution containing 0.005mg is to take the ratio of phosphate (PO4) standard solution, the same treatment simultaneously with the sample. Sodium 5.12 Determined according to the provisions of GB/T 9723-2007 of. 5.12.1 Instrument Conditions Source. sodium hollow cathode lamp; Wavelength. 589.0nm; Flame. acetylene - air. 5.12.2 Determination Weigh 1g sample was dissolved in water and diluted to 100mL. Take 10mL, a total of four. According to the provisions of GB/T 9723-2007 in 7.2.2 Measurement results calculated according to the provisions of 7.2.3. 5.13 Magnesium Determined according to the provisions of GB/T 9723-2007 of. 5.13.1 Instrument Conditions Source. magnesium hollow cathode lamp;

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