GB/T 25787-2010 PDF English
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| GB/T 25787-2010 | English | 150 |
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GB/T 25787-2010: 4,4-Sulfonyldiphenol (Bisphenol-S)---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT25787-2010
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 71.100.01; 87.060.10
G 56
4,4’-Sulfonyldiphenol (Bisphenol-S)
4,4’-二羟基二苯砜(双酚 S)
Issued on: DECEMBER 23, 2010
Implemented on: OCTOBER 01, 2011
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 Requirements ... 5
4 Sampling ... 5
5 Test methods ... 6
6 Inspection rules ... 9
7 Marking, labeling, packaging, transportation, storage ... 10
4,4’-Sulfonyldiphenol (Bisphenol-S)
1 Scope
This standard specifies the requirements, sampling, test methods, inspection
rules, marking, labeling, packaging, transportation and storage of 4,4’-
Sulfonyldiphenol (Bisphenol-S).
This standard applies to the control of product quality of 4,4’-Sulfonyldiphenol
(Bisphenol-S).
Structural formula.
Molecular formula. C12H10O4S
Relative molecular mass. 250.27 (according to 2007 international relative
atomic mass)
CASRN. 80-09-1
2 Normative references
The provisions in following documents become the provisions of this Standard
through reference in this Standard. For the dated references, the subsequent
amendments (excluding corrections) or revisions do not apply to this Standard;
however, parties who reach an agreement based on this Standard are
encouraged to study if the latest versions of these documents are applicable.
For undated references, the latest edition of the referenced document applies.
GB/T 605 Chemical reagent - General method for the measurement of color
(GB/T 605-2006, neq ISO 6353-1.1982)
GB/T 2384-2007 Dyes intermediates - General method for the determination
of melting range
GB/T 2386-2006 Dyestuffs and intermediate of dyes - Determination of
moisture
GB/T 3049-2006 Chemical products for industrial use - General method for
manufacturer’s name, sampling date, location. One container of sample is used
for inspection, the other is retained for reference.
5 Test methods
Warning - The personnel using this standard shall have practical
experience in formal laboratory work. This standard does not address all
possible security issues. It is the responsibility of the user to take
appropriate safety and health measures and to ensure compliance with
the conditions set by the relevant national regulations.
5.1 General provisions
Unless otherwise specified, only analytically pure reagents and grade III water
as specified in GB/T 6682 are used. The judgment of the inspection results is
carried out according to the comparison method of rounded-off value of clause
4.3.3 in GB/T 8170-2008.
5.2 Assessment of appearance
Visual assessment is performed in natural light.
5.3 Determination of the initial melting point of dry products
It is performed according to the provisions of GB/T 2384-2006. The specimen
is determined after drying in accordance with clause 5.5 of this standard.
The difference between the results of the two parallel determinations shall be
not more than 0.1 °C. Take the arithmetic mean as the determination result.
5.4 Purity of 4,4’-Sulfonyldiphenol and content of 2,4-Bisphenol S
5.4.1 Method summary
High-performance reversed-phase liquid chromatography (HPLC) is used to
separate 4,4'-sulfonyldiphenol and its components on octadecyl bonded
stationary phase by the use of acetonitrile, water and glacial acetic acid as
mobile phases. It is tested by the ultrasonic detector. The peak area
normalization is used to determine the purity of 4,4’-Sulfonyldiphenol and
content of 2,4-Bisphenol S.
5.4.2 Instrumentation
a) Liquid chromatograph. infusion pump - flow range (0.1 ~ 5.0) mL/min, the
flow stability in this range is ± 1%;
Detector - Multi-wavelength ultraviolet spectroscopic detector or
Weigh 3 g of sample, the drying temperature is 105 °C ~ 110 °C. The drying
time is 4 h, the rest is carried out according to the provisions of clause 3.2 of
GB/T 2386-2006.
The allowable deviation is 0.05% (mass fraction).
5.6 Determination of ash content
It is carried out according to the provisions of GB/T 21876-2008, the
temperature is 650 °C ± 25 °C, the sample amount is 10 g.
The allowable deviation is 0.05% (mass fraction).
5.7 Determination of iron ion content
5.7.1 Method summary
Use the ascorbic acid to reduce the ferric ions in the specimen to divalent iron
ions. At pH = 2 ~ 9, the divalent iron ions can react with 1,10-phenanthroline to
form an orange-red complex. At the maximum absorption wavelength (510 nm)
of the spectrophotometer, determine its absorbance; or otherwise perform
visual comparison with the standard iron color scale.
5.7.2 Determination procedures
The specimen after ashing according to 5.6 of this standard is dissolved by 4
mL (1.9) of nitric acid solution, then it is determined according to the provisions
of GB/T 3049-2006.
5.8 Determination of chromaticity
It is carried out according to the provisions of GB/T 605. Sample solvent.
methanol, sample colorimetric concentration. 100 g/L, colorimetric tube. 25 mL.
Error range. ±5 chromaticity number.
6 Inspection rules
6.1 Classification of inspection
All items as specified in Table 1 of clause 3 of this standard are exit-factory
inspection items.
6.2 Exit-factory inspection
4,4’-Sulfonyldiphenol shall pass the inspection by the quality inspection
department of the manufacturer, be attached with the certificate of conformity,
before exit-factory. The manufacturer shall ensure that all manufactured 4,4'-
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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