GB/T 2899-2017 English PDF (GB/T2899-2017)

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GB/T 2899-2017: Barium sulphate precipitated for industrial use
GB/T 2899-2017
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 71.060.50
G 12
Replacing GB/T 2899-2008
Barium sulphate precipitated for industrial use
工业沉淀硫酸钡
ISSUED ON: NOVEMBER 01, 2017
IMPLEMENTED ON: MAY 01, 2018
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Molecular formula and relative molecular mass ... 5 
4 Requirements ... 5 
5 Test method ... 6 
6 Inspection rules ... 15 
7 Markings and labels ... 16 
8 Packaging, transportation and storage ... 16 
Barium sulphate precipitated for industrial use
1 Scope
This standard specifies the requirements, test methods, inspection rules,
markings, labels, packaging, transportation and storage of barium sulphate
precipitated for industrial use.
This standard applies to barium sulphate precipitated for industrial use. This
product is mainly used in coatings, inks, pigments, rubber, batteries, plastics
and coated paper, metal smelting and other industries.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB/T 191-2008 Packaging - Pictorial marking for handling of goods
GB/T 1717-1986 Determination of pH value of an aqueous suspension of
pigments
GB/T 3049-2006 Chemical products for industrial use. General method for
determination of iron content - 1, 10-Phenanthroline spectrophotometric
method
GB/T 5211.2 Determination of matter soluble in water of pigments-Hot
extraction method
GB/T 5211.3 Determination of matter volatile of pigments at 105 °C
GB/T 5211.15-2014 General test methods for pigments and extender
pigments - Part 15: Determination of oil absorption
GB/T 5950-2008 Method for measurement of whiteness of building materials
and non-metal mineral products
GB/T 6003.1-2012 Test sieves - Technical requirements and testing - Part 1:
Test sieves of metal wire cloth
GB/T 6678 General principles for sampling chemical products
5.3.2.8 Methyl orange indicator solution: 1 g/L.
5.3.3 Instrument and equipment
5.3.3.1 Platinum crucible with lid.
5.3.3.2 High temperature electric furnace: The temperature can be controlled
at 800 °C ± 20 °C and 600 °C ± 20 °C.
5.3.4 Test procedure
Weigh about 1 g of the specimen which had been dried according to 5.4,
accurate to 0.0002 g. Place it in a platinum crucible into which 4 g of molten
mixture has been added. Mix it uniformly. Then cover another 4 g of molten
mixture above it and close the lid. Place the platinum crucible in a high-
temperature electric furnace. Melt it at 800 °C ± 20 °C for 40 min. Take it out to
cool it down.
In a 250 mL beaker, use 100 mL ~ 150 mL of hot water to leach out the melt.
Use a glass rod with a rubber tip to transfer all the white melt to the beaker.
Heat to boil it, until the melt is loose. Let it stand for a while. Use the slow
quantitative filter paper to filter the supernatant first. Then use the hot
anhydrous sodium carbonate solution to wash the insoluble matter by
decantation. Transfer the insoluble matter to the filter paper to continue washing
until it is free of sulfate (testing method: Take 2 mL of filtrate; add 2 drops of
hydrochloric acid solution and 0.5 mL of barium chloride solution; the solution
shall remain transparent after 10 min). Discard the filtrate.
Add 30 mL of hot hydrochloric acid solution to the funnel, in six times, to dissolve
the precipitate. After adding the hydrochloric acid solution, quickly place the
watch glass on the funnel. Collect the filtrate in a 500 mL beaker. After adding
the hydrochloric acid solution each time, use hot water to wash it once. After
the hydrochloric acid solution is completely added, use hot water to rinse the
watch glass and the filter paper on the funnel, until it is free of chloride (Testing
method: Take 2 mL of filtrate; add 0.5 mL of silver nitrate solution; it shall remain
transparent after 5 min). Add 2 ~ 3 drops of methyl orange indicator solution in
the filtrate, use ammonia solution to neutralize until it becomes pale yellow. Add
2 mL of hydrochloric acid solution. Finally add water to adjust the solution
volume to 400 mL.
Heat the solution to boiling. Add 20 mL of hot sulfuric acid solution at a uniform
rate under stirring. Control the addition within 2 min ~ 2.5 min. Cover the watch
glass. Place the beaker on the boiling water bath for 2 h or room temperature
for more than 12 h. Use slow quantitative filter paper to filter it. Use hot water
to rinse the precipitate until the filtrate is free of chloride (the testing method is
the same as before). Place the precipitate and filter paper in a porcelain crucible
that was burned to constant temperature at 600 °C ± 20 °C in advance. Dry and
5.7 Determination of whiteness
5.7.1 Instrument and equipment
5.7.1.1 Whiteness meter: Same as Chapter 5 of GB/T 5950-2008.
5.7.1.2 Standard whiteboard: Same as Chapter 6 of GB/T 5950-2008.
5.7.2 Test procedure
Same as Chapter 7 and Chapter 8 of GB/T 5950-2008.
5.7.3 Processing of test data
As specified in Chapter 9 of GB/T 5950-2008, it is calculated using the blue light
whiteness formula.
Take the arithmetic mean of the parallel determination results as the
measurement result. The absolute difference between the parallel
determination results is not more than 1.0.
5.8 Determination of oil absorption
5.8.1 Reagents or materials
Same as Chapter 4 of GB/T 5211.15-2014.
5.8.2 Instrument and equipment
Same as Chapter 5 of GB/T 5211.15-2014.
5.8.3 Test procedure
Weigh about 10 g of specimen, accurate to 0.01 g. Put it on a flat plate. From a
drip bottle which contains refined linseed oil of known mass (accurate to 0.01
g), add refined linseed oil dropwise, 4 ~ 5 drops a time. After each addition, use
a knife to continually press-grind it forcedly. When approaching to the end point,
it shall add it dropwise. After finishing the last drop, the specimen is wetted by
the oil and forms a whole block. When it is not cracked or broken when
spreading, and can adhere to the flat plate, it is used as the end point. All
operations shall be completed within 20 min ~ 25 min. Finally weigh the mass
of the drip bottle.
5.8.4 Processing of test data
The oil absorption is calculated by w3. The value is expressed by the mass of
oil absorbed per 100 g of sample, calculated according to formula (3):
5.11.2.2 Iodine solution: c (1 / 2I2) ≈0.01 mol/L. Pipette 10 mL of the iodine
standard titration solution prepared according to 5.9.1 in HG/T 3696.1-2011.
Place it in a 100 mL brown volumetric flask. Use water to dilute it to the mark.
Shake it uniformly.
5.11.2.3 Starch indicator solution: 5 g/L. Weigh 0.5 g of starch. Add 5 mL of
water to make it into a paste. Add the paste to 90 mL of boiling water whilst
stirring it. Boil it for 1 min ~ 2 min. Cool it down. Dilute it to 100 mL. The period
of use is two weeks.
5.11.2.4 Sodium thiosulfate standard titration solution: c (Na2S2O3) ≈0.01
mol/L. Pipette 25 mL of sodium thiosulfate standard titration solution prepared
and calibrated according to 5.6 of HG/T 3696.1-2011 in a 250 mL volumetric
flas...