GB 41700-2022Electronic cigarette (English PDF)

Annex A Additives permitted to use in e-atomization materials and their maximum usage

Table A.1 provides the list of additives permitted to use in e-atomization materials and their maximum usage. Table A.1 Additives permitted to use in e-atomization materials and their maximum usage SN Chinese namesa Engish names CAS code Maximal usage (mg/g) Chinastandards.org Table A. […]

Annex B

Thermocouple method is used to measure the surface temperature of the heating unit of the e-cigarette device. The tolerance of difference of the thermocouple should reach Level 1. The sampling frequency of temperature should not be less than 10 Hz. The test should be done in a setting at 20°C±5°C in the environment without forced convective air. For e-cigarette device using e-liquid, e-liquid should be removed as much as possible before setting up the thermocouple, or e-cigarette device unfilled with e-liquid or a cartridge should be used. For e-cigarette device using solid e-atomization materials, it should be loaded with solid eatomization material. Remove the outer shell of the device or the cartridge and the protective parts near the heating unit to make it easy to install the thermocouple. Adhere the thermocouple to the hottest area of the heating unit with high temperature resistant glue. Other auxiliary means such as infrared device can be used to locate the location of the hottest area. After the thermocouple is installed, the e-cigarette device or the cartridge should be restored as much as possible to ensure it functions normally. […]

Annex C Determination of 2,3-butanedione in e-atomization material

2,3-butanedione in e-atomization material is derivatized with 2,4-dinitrophenylhydrazine (DNPH) solution. The amount of derivative is determined by using high-performance liquid chromatography. C.2.1 Analytical balance with a sensitivity of 0.1 mg. C.2.2 High-performance liquid chromatography device with UV or diode array detector. C.3.7 2,4-Dinitrophenylhydrazine hydrochloride (DNPH-HCl), purity no less than 98%. C.3.9 Aqueous solution of phosphoric acid. Measure 60 mL of phosphoric acid (C.3.3) into a 1L beaker and add slowly 440 mL of water (C.3.1) while stirring to the scale. Mix well and store in the reagent bottle. The stable period is Weigh 1.00 g of DNPH-HCl (C.3.7) into a 2-L beaker; add 500 mL of acetonitrile (C.3.2) and 40 mL aqueous solution of phosphoric acid (C.3.9). Dissolve and add 500 mL of water (C.3.1). Mix well. The prepared solution shall be stored in a brown reagent bottle and kept away from sunlight. It will be stable for 1 week. Weigh 0.10 g of 2,3-butanedione (C.3.8) into a 10-mLbrown volumetric flask with an accuracy to 0.1 mg. Dilute with acetonitrile (C.3.2) to volume. The solution is stored at -18°C in darkness and will be stable for 3 months. Pipette 0.1 mL of 2,3-butanedione solution (C.3.11.1) into a 25-mL brown volumetric flask; add 20 mL of derivatization reagent (C.3.10). Shake the flask well to enable reaction at room temperature for 20 min. Add 1 mL of pyridine (C.3.4) and then dilute with acetonitrile (C.3. 2) to volume. The solution is stored at -18°C in darkness and will be stable for 3 months. acetonitrile to prepare at least 5 standard working solutions with mass concentrations ranging from 0.1 µg/mL to 4 µg/mL respectively. The solution should be used immediately after preparation. C.3.12 Polytetrafluoroethylene (PTFE) filter membrane, 0.45 µm. Weigh 0.5 g of sample in a 10-mL brown volumetric flask with accuracy to 0.1 mg; add 5 mL of derivatization reagent (C.3.10); shake well and react for 20 min at room temperature; add 0.25 mL of pyridine (C.3.4) and dilute to volume with acetonitrile (C.3.2); filter through PTFE membrane (C.3.12) and place in a brown chromatography vial for measurement. Weigh accurately 0.5 g of sample into a 15-mL centrifuge tube with accuracy to 0.1 mg; add 10 mL of derivatization reagent (C.3.10), keep away from light and vortex shake for reaction for 20 min, filter through PTFE membrane (C.3.12) and then take 5 mL into a 10-mL brown volumetric flask. Add 0.25 mL of pyridine (C.3.4), dilute with acetonitrile (C.3.2) to the scale, filter through PTFE membrane (C.3.12) and place in a brown chromatography vial for measurement. The following analytical conditions are available for reference. […]

Annex D Standard conditions for electronic cigarette vaping

The puff profile of the vaping machine is rectangular. During the measurement, ensure that the puff volume

meets the requirements of D.2 when a pressure drop device of (1000±50) Pa is connected in series in the gas path is shown in Figure D.1. In Figure D.1, the area of V1+V3 enclosed by the curves when the gas flow rate rises (t0 – t1) and falls (t2 t3) should not exceed 10% of the total puff volume in graphs V1+V2+V3. The maximum gas flow rate should be maintained between 16.5 and 20.1 mL/s.

should be synchronized with the vaping duration, with no more than 0.1 second difference between the start trigger time and the start vaping time, and no more than 0.1 second difference between the end trigger time and the end vaping time.

The following criteria should be met for atmosphere test:

Annex E Determination of nicotine released in electronic cigarette emissions

The e-cigarette emissions are trapped on glass fiber filter, which is extracted with isopropanol solution that contains an internal standard. The nicotine content of the extract is determined by gas chromatography. E.2.2 Analytical balance, sensitive to 0.1 mg. E.2.4 Conical flasks with stopper, 50mL. E.2.5 Gas chromatography equipment with a hydrogen flame ionization detector. E.3.2 Internal standard: n-heptadecane or 2-methylquinoline, purity not less than 99%. Note: Other substances can be used as internal standards if their purity meets the requirements and they do not elute simultaneously with other released components. Nicotine. Dissolve nicotine (E.3.3) in isopropanol (E.3.1) solution to prepare a standard stock solution of nicotine, typically 5.0 mg/mL. The solution is stored at 4°C in darkness and will be stable for 6 months. Add different volumes of nicotine standard stock solution (E.3.5.1) into 20 mL of extraction solution (E.3.4) respectively to prepare at least 5 levels of standard working solutions, with their mass concentration ranging from 0.01 mg/mL to 0.5 mg/mL. The solutions should be used immediately after preparation. E.3.5 Glass fiber filter paper, in line with the requirements of GB/T 16450. The cartridge should be in sealed package and left for at least 12 hours in the test atmosphere for temperature balance. Rechargeable e-cigarettes should have their batteries fully charged prior to testing. and place both filters in a 50-mL conical flask with stopper (E.2.4). Add 20 mL of extraction solution (E.3.4). Shake for 30 min before the extract is harvested and put into a chromatography vial for further tests. Vape in line with the requirements set out in Annex D after the e-cigarette device is preheated. Vape 4 cartridges. The number of puffs per cartridge is determined according to the heating time of the e- cigarette (the time between the completion of the warm-up and the cessation of heating) and calculated Where n – number of puffs in integer values from the calculation; t – heating time in seconds (s). the trap with a new glass fiber filter (E.3.6) and place both filters in a 50-mL conical flask with stopper (E.2.4). Add 20 mL of extraction solution (E.3.4). Shake for 30 min before the extract is harvested and put into a chromatography vial for further tests. The following analytical conditions are available for reference. The applicability should be verified before other conditions are used. — Chromatographic column: It is recommended to use flexible quartz capillary column with a stationary phase of 6% cyanopropylphenyl and 94% dimethyl polysiloxane [30 m — Injection volume: 1μl; split ratio: 20:1; — Carrier gas: helium, 1.8 mL/min; The standard working solutions of nicotine (E.3.5. […]

Annex F Determination of formaldehyde, acetaldehyde, acrolein, and 2,3-buranedione released

Formaldehyde, acetaldehyde, acrolein, and 2,3-butanedione in electronic cigarette emissions are trapped and derivatized with 2,4-dinitrophenylhydrazine (DNPH) solution. The amounts of derived compounds are determined by using high-performance liquid chromatography. F.2.2 Analytical balance with 0.1 milligram readability. F.2.3 High-performance liquid chromatography device with UV or diode array detector. F.2.4 Trap. See Figure F.1 for schematic diagram. 5- Outside diameter of the tube 8 mm; 6- Outside diameter of the tube 30 mm; circumference, and the round hole at the bottom is 4 mm in diameter; Pipette 60 mL of phosphoric acid (F.3.3) into a 1-L beaker and add 440 mL water (F.3.1) slowly. Mix well and transfer to a reagent bottle. The stable period is 3 months. Weigh 1.0 g of DNPH (F.3.7) and dissolve it in 500 mL of acetonitrile (F.3.2) and 40 mL of aqueous solution of phosphoric acid (F.3.10) in a 2L brown volumetric flask. Add 500 mL of water (F.3.1) and mix well. Transfer to a brown reagent bottle and stored in darkness away from light. It will be stable for 1 week. Weigh accurately 0.050 g of DNPH derivatives of formaldehyde and acrolein and 0.10 g of DNPH derivatives of acetaldehyde (F.3.8) into 50-mL brown volumetric flask, accurate to 0.1mg. Dilute with acetonitrile (F.3.2) to volume. The solution is stored at -18°C in darkness and will be stable for 3 months. Weigh 0.10 g of 2,3-butanedione (F.3.9) into a 10-mL brown volumetric flask, precise to 0.1 mg, and dilute with acetonitrile (F.3.2) to volume. The solution is stored at -18°C in darkness and will be stable for 3 months. add 20 mL of derivatization reagent (F.3.11). Shake the flask well to enable reaction at room temperature for 20 min. Add 1.0 mL of pyridine (F.3.4) and then dilute with acetonitrile (F.3.2) to volume. The stock solution is stored at -18°C in darkness and will be stable for 3 months. solution is stored at -18°C in darkness and will be stable for 3 months. Pipette different volumes of the mixed standard stock solution (F.3.12.4) into 6 brown volumetric flasks of 10-ml respectively. Dilute with acetonitrile (F.3.2) to volume. Prepare at least 5 different mixed standard working solutions. The recommended mass concentrations are: formaldehyde, 0.07 ug/ml – 14 ug/ml; ug/ml. These solutions should be used immediately after preparation. F.3.13 Polytetrafluoroethylene (PTFE) filter membrane, 0.45 µm. The cartridge should be in sealed package and left for at least 12 hours in the test atmosphere for temperature balance. Rechargeable e-cigarettes should have their batteries fully charged prior to testing. between the e-cigarette holder and the trapping device (see Fig F.2 for the connection method). […]