GB/T 30919-2014Styrene-butadiene rubber, raw - Determination of N-nitrosamines content by gas chromatography - Thermo energy analyzer method (English PDF)
苯乙烯-丁二烯生橡胶 N-亚硝基胺化合物的测定 气相色谱-热能分析法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
July 8, 2014
Implementation date
December 1, 2014
Scope
GB/T 30919-2014 is the English-translated version of 苯乙烯-丁二烯生橡胶 N-亚硝基胺化合物的测定 气相色谱-热能分析法.
GB/T 30919-2014 is the Chinese standard "Styrene-butadiene rubber, raw - Determination of N-nitrosamines content by gas chromatography - Thermo energy analyzer method".
Its scope clause reads: This standard specifies the use of gas chromatography - thermal energy analyzer (GC-TEA) Determination of styrene - butadiene rubber N- nitroso dimethylamine, N- nitroso methylethyl amine, N- nitroso diethylamine, N- nitroso two propanamine, N- nitroso-dibutylamine, N- nitroso piperidine, N- nitroso pyrazole Pyrrolidine, N- nitroso morpholine, N- nitroso 10 kinds of methods amine content N- nitroso-methylaniline, N- nitroso-diethylaniline and the like.
This standard applies to non-oil-extended emulsion styrene - butadiene rubber raw. Its clauses include method summary; reagents and materials.
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Document preview — GB/T 30919-2014
National Standard of the People's Republic of China
- ICS
- 83.040
- Classification
- G 34
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Method Summary
- 4 Reagents and materials
1 Scope
This standard specifies the use of gas chromatography - thermal energy analyzer (GC-TEA) Determination of styrene - butadiene rubber N- nitroso dimethylamine,
N- nitroso methylethyl amine, N- nitroso diethylamine, N- nitroso two propanamine, N- nitroso-dibutylamine, N- nitroso piperidine, N- nitroso pyrazole
Pyrrolidine, N- nitroso morpholine, N- nitroso 10 kinds of methods amine content N- nitroso-methylaniline, N- nitroso-diethylaniline and the like.
This standard applies to non-oil-extended emulsion styrene - butadiene rubber raw.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 15340 natural, synthetic rubber raw sampling and sample preparation method (GB/T 15340-2008, ISO 1795.2000, IDT)
3 Method Summary
The sample was pulverized, extracted with a solvent in the rubber compound N- nitrosamine, removing interferences, the solution was concentrated by GC-TEA Measured.
4 Reagents and materials
Unless otherwise indicated in the analysis using only the confirmation of analytical grade or higher purity reagents and distilled water or equivalent purity.
4.1
methanol.
4.2
dichloromethane.
4.3 nitrosamines standard substance
purity > 98%, or the exact concentration of the standard solution.
4.4 NaCl
mass fraction of 2%.
Methanol 4.5 - Sodium Chloride Solution. methanol solution of sodium chloride (4.4) in a mixed solution (volume ratio 2.3).
4.6
standard stock solution A. Take about 100mL of methanol was added to the brown 500mL volumetric flask, then add standard substance ten kinds of nitrosamines (Each about 50mg, accurate to 0.1mg), diluted with methanol to the mark, shake seal below 5 °C in the dark environment preservation, valid
In Standards certificate shall prevail. It can also be directly prepared by dilution of standard solution accurate concentration. A standard solution of each of N-nitrosamines
Concentration of approximately 100µg/mL.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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