GB/T 38211-2019 PDF English
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| GB/T 38211-2019 | English | 170 |
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GB/T 38211-2019: Sulfuryl fluoride---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/GBT38211-2019
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 65.100.10
G 25
Sulfuryl fluoride
硫酰氟
ISSUED ON: DECEMBER 10, 2019
IMPLEMENTED ON: JULY 01, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Requirements ... 4
4 Test methods ... 5
5 Acceptance and quality assurance period ... 9
6 Signs, labels, packaging, storage and transportation ... 10
Annex A (informative) Other names, structural formulas and basic physicochemical
parameters of sulfuryl fluoride ... 11
Sulfuryl fluoride
1 Scope
This Standard specifies the requirements, test methods, acceptance, quality assurance
period and signs, labels, packaging, storage and transportation for sulfuryl fluoride.
This Standard applies to sulfuryl fluoride consisting of sulfuryl fluoride and impurities
generated in its production.
NOTE: See Annex A for other names, structural formulas and basic physicochemical parameters of
sulfuryl fluoride.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB 190, Packing symbol of dangerous goods
GB/T 1604, Commodity pesticide regulations for acceptance
GB/T 1605-2001, Sampling method for commodity pesticides
GB 3796, General rule for packing of pesticides
GB/T 6681, General rules for sampling gaseous chemical products
GB/T 6682-2008, Water for analytical laboratory use - Specification and test
methods
GB/T 8170-2008, Rules of rounding off for numerical values and expression and
judgement of limiting values
GB 15603, Rule for storage of chemical dangers
GB 17916, Specifications for storage and preservation of toxic goods
3 Requirements
3.1 Appearance
It is colorless and odorless gas at normal temperature and pressure. It is a colorless
homogeneous liquid under pressure or freezing.
3.2 Technical indicators
Sulfuryl fluoride shall also meet the requirements of Table 1.
4 Test methods
WARNING -- Persons using this Standard shall have practical experience in
laboratory work. Determination of pH value shall be carried out in a fume hood.
This Standard does not address all safety issues. It is the user's responsibility to
take appropriate safety and health measures and to ensure compliance with the
relevant state regulations.
4.1 General provisions
Unless other requirements are specified, the reagents and water used in this Standard
refer to the analytically pure reagents and grade three water specified in GB/T 6682-
2008. The determination of the inspection results shall be carried out according to 4.3.3
in GB/T 8170-2008.
4.2 Sampling
Conduct according to GB/T 6681 and 5.3.4 in GB/T 1605-2001. Use random sampling
method to take samples from ay steel cylinder for each batch of products. The sampling
volume shall not be less than 300mL (the cylinder pressure shall not be less than 5.0MPa,
and the filling factor shall be 1.0kg/L).
4.3 Identification test
Infrared spectroscopy -- There shall be no obvious difference between the infrared
absorption spectra of the specimen and the sulfuryl fluoride standard gas in the range
of 1800cm-1~400cm-1. The infrared spectrum of sulfuryl fluoride standard gas is shown
in Figure 1.
100 (or other chromatographic columns with the same column efficiency).
Sample injector: 5mL.
4.4.4 Preparation of chromatographic column
4.4.4.1 Application of fixative
Weigh 0.5g of polychlorotrifluoroethylene wax. Use ether or acetone to dissolve in the
beaker. Pour 25g of carrier and mix well. Dry under infrared light for later use.
4.4.4.2 Packing of chromatographic column
Connect a small funnel to the outlet of the washed and dried chromatographic column.
Fill the column with the prepared packing in batches. At the same time, tap the column
wall continuously until the packing is 1.5cm away from the column outlet. Move the
funnel to the inlet of the column. Plug a small dollop of silanized glass wool at the outlet
end. Connect it to vacuum pump via rubber hose. Turn on the vacuum pump. Continue
to slowly add the packing. Keep tapping on the column wall. Pack it evenly. The
packing is completed. Stuff a small dollop of glass wool at the inlet end. Squeeze
properly to keep stuffing from moving. (Or purchase other chromatographic columns
with the same column efficiency).
4.4.4.3 Aging of chromatographic column
Connect the column inlet end to the vaporizer. The outlet end is temporarily not
connected to the detector. Pass the carrier gas at a flow rate of 15mL/min. Rise the
temperature to 150°C in several stages. At this temperature, conduct at least 24h aging.
4.4.5 Operating conditions of gas chromatography
Temperature (°C): 100 for column temperature, 150 for gasification chamber, 150 for
detector chamber.
Carrier gas flow rate (mL/min): 30.
Injection volume (mL): 2.
Retention time (min): 0.8 for air, 1.3 for carbon dioxide, 1.7 for sulfuryl fluoride, 4.3
for chlorine, 4.8 for water, 6.9 for sulfur dioxide, 8.9 for sulfuryl chloride fluoride.
Stop time (min): 20.
The above operating conditions of gas chromatography are typical operating parameters.
According to the characteristics of different instruments, the given operating parameters
can be properly adjusted, so as to obtain the best results. A typical sulfuryl fluoride gas
chromatogram is shown in Figure 2.
ΣAi - The sum of the peak areas of all component chromatographic peaks (excluding
the air peak).
4.4.8 Tolerance
The difference between the two parallel determination results of sulfuryl fluoride
volume fraction shall not be greater than 0.2%. Take the arithmetic mean as the
determination result.
4.5 Determination of pH value
4.5.1 Test instruments
Porous gas washing bottle: 250mL.
Balance: the accuracy is 0.01g.
Acidity meter: the division value of pH is 0.01.
4.5.2 Determination steps
Add 100mL of carbon dioxide-free distilled water to the gas washing bottle. Connect
the washing bottle to the sampling cylinder with a rubber tube. Then place the cylinder
on the balance. Control the flow rate of the absorbed gas to be about 300mL/min, that
is, about 1g/min. Inject 1g of sulfuryl fluoride gas. Then use the pH meter to measure
the pH of the solution in the absorption bottle.
4.5.3 Tolerance
The difference between the results of three parallel determinations of pH value shall not
be greater than 0.2. Take the arithmetic mean value as the determination result.
5 Acceptance and quality assurance period
5.1 Acceptance
It shall comply with the provisions of GB/T 1604.
5.2 Quality assurance period
Under the specified storage and transportation conditions, the quality assurance period
of sulfuryl fluoride is 2 years from the production date. During the quality assurance
period, all indicators shall meet the standard requirements.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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