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GB/T 1617-2002 English PDF (GBT1617-2002)

GB/T 1617-2002 English PDF (GBT1617-2002)

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GB/T 1617-2002: Barium chloride for industrial use

This Standard specifies industrial barium chloride.
GB/T 1617-2002
ICS 71.060.50
G 12
GB
NATIONAL STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
Barium chloride for industrial use
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ISSUED ON. SEPTEMBER 24, 2002
IMPLEMENTED ON. APRIL 01, 2003
Issued by.
General Administration of Quality Supervision, Inspection and
Quarantine of the PEOPLE Republic of China
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative references ... 6
3 Classifications ... 7
4 Requirements ... 7
5 Test methods ... 7
6 Inspection rules ... 19
7 Marks and labels ... 21
8 Packaging, transport and storage ... 21
9 Safety requirements ... 22
Foreword
This Standard non-equivalently adopted the Japanese standard of Industrial Barium Chloride JIS K 1414. 1992. It is derived from revising the national standard of Industrial Barium Chloride GB/T 1617-1989. Compared with the Japanese standard, the main technical differences of this Standard are as follows.
?€? There is only one grade in Japanese standard with no classification or grading. While this Standard divides them into 2 categories according to the use. Class ??? for electronic industrial use in 3 grades. superior quality products, first-class products and qualified products; Class ??? for general industrial use.
?€? The Japanese standard has 5 indexes. barium chloride content, strontium content, sulfide content, iron content and water insoluble substances. Based on the Japanese standard, Class ???of this Standard has added 2 more indexes including calcium and sodium; and Class ??? has added the index of calcium content. ?€? In Japanese standard, the index of barium chloride content is 97.7%. In this Standard, Class ??? is 99.5%, Class ??? is 99.0%, first-class product is 98.0%, and qualified product is 97.0%.
?€? In Japanese standard, the index of strontium content is 1.0% (counted as SrCl2??2H2O). In this Standard, Class ??? is 0.05%, superior quality product of Class ??? is 0.45% (counted as Sr), first-class product is 0.90%, and qualified product has no requirement.
?€? In Japanese standard, the index of sulfide content is 0.001%. In this Standard, Class ??? is 0.002%, superior quality product of Class ??? is 0.003%, first-class product is 0.008%, and qualified product has no requirement.
?€? In Japanese standard, the index of iron content is 0.001%. In this Standard, Class ??? is 0.001%, superior quality product of Class ??? is the same as Japanese standard, first-class product is 0.003%, qualified product is 0.002%.
?€? In Japanese standard, the index of water insoluble substances is 0.05%. In this Standard, the superior quality products of Class ??? and Class ??? is same as Japanese standard, first-class product of Class ??? is 0.10%, qualified product is 0.20%.
?€? In this Standard, the quality score index of sodium is 0.10% for Class ???. Compared with previous standard, the differences of this Standard are as follows. ?€? The previous standard has no classification. While this Standard divides the industrial barium chloride into 2 categories. electronically industrial use and general industrial use.
?€? The previous standard has set up 6 indexes. barium chloride, calcium, sodium and sulfide contents, iron content and water insoluble substances. This Standard has added 1 index - strontium content; and deleted the index - sodium content for Class ???.
?€? The index of Class ??? products in this Standard is formulated according to the special requirements of electronic industry.
?€? In the test method, strontium content index adopts atomic absorption method. In the test method of sodium content index, it adds atomic absorption
spectrophotometry into the instrument.
Since the date of implementation of this Standard, it shall replace the GB/T 1617-1989. This Standard is proposed by previous State Petroleum and Chemical Industry Bureau. This Standard is under the jurisdiction of Inorganic Chemical Industry Affiliate of National Technical Committee or Standardization.
Drafting organizations of this Standard. Tianjin Research Institute of Chemical Industry, Sanmenxia Aoke Chemical Industry Co., Ltd, Zhangjiaba Salinization Co., Ltd, Tianjin Chemical Plant of Bohai Chemical Industry Co., Ltd, and Shandong Xinke Huanhua Co., Ltd.
Participating organization of this Standard. Qingdao Red Star Chemical Croup Co, Ltd. Main drafters of this Standard. Shi Jie, Fan Guoqiang, Fan Zhanyan, Wang Ziqin, Shao Yingbo, Wang Junqiang, and Wang Chuntiao.
This Standard is published in 1965 for the first time. The first revision is in 1979, and the second revision is in 1989.
This Standard is entrusted to Inorganic Chemical Industry Affiliate of National Technical Committee or Standardization for interpretation.
Barium chloride for industrial use
1 Scope
This Standard specifies industrial barium chloride?€?s requirements, test methods, inspection rules, signs, labels, packaging, transportation, storage and safety. This Standard is applicable to industrial barium chloride. The product is mainly used in chemical industry, electronic industry and metal process, etc.
Formula. Bacl2??2H2O
Relative molecular mass. 244.26 (1999 International Relative Atomic Mass) 2 Normative references
The following standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. At the time of publication, the editions indicated are valid. All standards are subject to revision. The parties who are using this Standard shall explore the possibility of using the latest version of the following standards. GB 190-1998 Packing Symbol of Dangerous Goods
GB 191-2000 Packing and Storage Diagram Symbols (eqv ISO 780.1997)
GB/T 601-1988 Chemical Reagents. preparation of standard solution for titrimetry (volumetric analysis)
GB/T 602-1988 Chemical Reagents. preparation (neq ISO 6353-1.1982) of standard solution for determination of foreign matters
GB/T 603-1988 Chemical Reagents. preparation (neq ISO 6353-1.1982) of
preparations and products used in the test methods
GB/T 1250-1989 Extremely Numerical Representation and Determination Method GB/T 3049-1986 General Method of Iron Content Measurement in Chemical
Products. phenanthroline spectrophotometry (neq ISO
6685-1.1982)
GB/T 6678-1986 General Rules of Chemical Product Sampling
Preparation. WEIGH 0.5g of calconcarboxylic acid (C21H14N2O7S) and dissolve it in 100mL (1+10) of triethanolamine solution.
c) Disodium EDTA standard titration solution. c (EDTA) is about 0.05mol/L. d) Disodium EDTA standard titration solution. c (EDTA) is about 0.005mol/L. Preparation.
A total of 100ml of disodium EDTA standard titration solution (c) is taken out by a pipette and placed in a 1000mL volumetric flask, then diluted to the scale with water and shaken up.
e) Calconcarboxylic acid. 5g/L of triethanolamine solution.
f) Methyl red indicator solution. 10g/L
5.3.2.3 Analytic steps
WEIGH about 7.5g of test specimen, accurate to 0.0002g. PLACE it into a 300mL beaker. ADD in 170mL of water free from carbon dioxide to dissolve the specimen. ADD in 1 drop of methyl red indicator solution. The test solution shall present pure yellow (otherwise, it shall be adjusted to pure yellow by sodium hydroxide solution). Then add another drop of sodium hydroxide solution. ADD 16mL of ethanol (if the quality score of strontium is under 0.33%, the test specimen may not need to add ethanol). USE burette to add 32mL-33mL of potassium chromate solution. The adding speed shall make the solution that can flow out in a straight line. And meanwhile STIR the test solution slowly. When finished, it is stirring for 30 minutes and moved to a 250mL volumetric. DILUTE to the scale with water and SHAKE up. Then MOVE to a dry beaker. STAND for 1 hour. CONDUCT the dry filtration using a slow quantitative filter paper. DISCARD the first 10mL of filtrate. USE pipette to transfer 100ml of filtrate. PLACE in a 20mL beaker. ADD 5-8 drops of Calconcarboxylic acid. ADD 4mL of sodium hydroxide solution. USE disodium EDTA standard titration solution (d) to titrate it until the solution presents in bright green and the color is not changed within 30 s.
If the end point is not highlighted and the green is darkening, it means that the separating effect of strontium is poor or the quality score of strontium exceeds 0.8%. In this case, it shall reduce the sample size. And additionally ADD in guaranteed reagent of barium WEIGH 6.5g of iodine and 17g of potassium iodide. DISSOLVE in water. DILUTE to 1000mL with water. STORE in a brown bottle with a plug.
5.4.2.2 Icy acetic acid solution. 1+9.
5.4.2.3 Sulfuric acid solution. 1+8.
5.4.2.4 Sodium thiosulfate standard titration solution c(Na2S2O3) is about 0.05mol/L. It is accurately diluted to one fold by using 0.1mol/L of sodium thiosulfate standard titration solution prepared according to GB/T 601.
5.4.2.5 Dissoluble starch solution. 5g/L.
5.4.3 Instruments and devices
5.4.3.1 Iodine flask. 250mL;
5.4.3.2 ...

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