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Industrial 1,1,1,2-Tetrafluoroethane (HFC-134a) (Appendix A)
Time of Update: 2022-08-12
Table A1 Relative retention time Appendix A(Standard appendix)Typical chromatogram and relative retention time of 1,1,1,2-tetrafluoroethane content determinationThe chromatogram of A1 is shown in Figure A1 .
Table A1 Relative retention time Appendix A(Standard appendix)Typical chromatogram and relative retention time of 1,1,1,2-tetrafluoroethane content determinationThe chromatogram of A1 is shown in Figure A1 .
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Industrial 1,1,1,2-Tetrafluoroethane (HFC-134a) (1)
Time of Update: 2021-11-06
1 ScopeThis standard specifies the requirements, test methods, inspection rules and signs, packaging, transportation and storage of 1,1,1,2-tetrafluoroethane for industrial use .
3. 2 The quality of industrial 1,1,1,2-tetrafluoroethane should meet the technical requirements shown in Table 1 .
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Industrial 1,1,1,2-Tetrafluoroethane (HFC-134a) (2)
Time of Update: 2021-11-06
2. 1 Method summaryUse gas chromatography to pass through a capillary chromatographic column under selected working conditions to separate the components in the sample, use flame ionization detector to detect, area normalization method to calculate 1,1,1,2-tetrafluoro The content of ethane .
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Industrial 1,1,1,2-Tetrafluoroethane (HFC-134a) (3)
Time of Update: 2021-11-06
Connect the small and small joints of the stainless steel (or suitable material) tube for the injection needle to the outlet valve of the sampling cylinder, insert the injection needle into the bottom of the electrolytic cell of the coulometric moisture analyzer, and control the injection speed to (1～2) g/min , The injection volume is about 10g or adjust the injection volume appropriately according to the water content.
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Industrial 1,1,1,2-Tetrafluoroethane (HFC-134a) (5)
Time of Update: 2021-11-06
7. 1 Method summaryUnder acidic conditions, the chloride in the 1,1,1,2-tetrafluoroethane sample reacted with a saturated silver nitrate solution to form a silver chloride precipitate, and the test passed if no flocculent precipitate was observed .
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Industrial 1,1,1,2-Tetrafluoroethane (HFC-134a) (6)
Time of Update: 2021-11-06
If an indicator of the inspection result does not meet the requirements of this standard, the steel bottled product shall be sampled in twice the number of packaging units for inspection.
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Industrial 1,1,1,2-Tetrafluoroethane (HFC-134a) (4)
Time of Update: 2021-11-06
1 Gas chromatograph: All gas chromatographs equipped with a sampling valve, a thermal conductivity detector (TCD) and capable of operating under the conditions shown in Table 3 can be used .
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Industrial 1,1,1,2-Tetrafluoroethane (HFC-134a) (Appendix B, Appendix C)
Time of Update: 2021-11-06
Table B1 Relative retention time Appendix C(Standard appendix)Vapor pressure of 1,1,1,2-tetrafluoroethane (HFC-134a) at different temperaturesThe vapor pressure of C1 1,1,1,2-tetrafluoroethane (HFC-134a) at different temperatures is shown in Table C1 .
