GB/T 33871-2017Test method of total volatile organic compounds(TVOC), benzene and styrene in toner—Thermal desorption-chromatography (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This standard specifies the method of determination of TVOC, benzene and styrene content in the toner by thermal desorption - gas chromatography.

This method is suitable for the determination of TVOC, benzene and styrene in toner.

2 Principle

The thermal desorption tube filled with the toner sample is directly heated on a thermal desorber, and the volatile organic compounds in the sample enter with an inert carrier gas Cryogenic trap, the trap quickly heated to high temperatures, gasification of organic matter with the carrier gas into the gas chromatographic detection analysis, with a standard method of quantification Calculate.

3 Reagents and materials

3.1 Methanol, n-hexane and n-hexadecane, with chromatographic purity and above.

3.2 standard solution. C = 1000mg/L, you can buy a certified standard solution can also be prepared with standard substances. Target compounds. Benzene, Benzene Ethylene, toluene, n-butanol, m-xylene, o-xylene, p-xylene, ethylbenzene, n-undecane, benzaldehyde, n-propylbenzene, cumene, Acid esters (such as methyl acrylate, ethyl ester, butyl ester, etc.). Note: Depending on the type of volatiles contained in the sample, the type of volatiles may be appropriately increased or decreased.

3.3 Desorption tube. Stainless steel or glass material desorption tube, and with the desorption tube supporting PTFE tube, to silanized glass wool.

3.4 Adsorbent. TenaxTA or other equivalent adsorbent.

3.5 Pipette or pipette. 1mL, 5mL, 10mL; volumetric flask. 100mL.

3.6 Carrier gas. Helium or nitrogen, purity to meet the gas chromatography or GC-MS analysis requirements, to be purified before use.

3.7 Hydrogen purity to meet the requirements, to be purified before use.

3.8 Air. Should be non-corrosive impurities, to be purified before use.

4 Equipment