A method for detecting mercury content in mainstream cigarette smoke
A technology for cigarette mainstream smoke and element content, applied in the field of chemical analysis and detection, can solve the problems of lack of accuracy and reliability
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Embodiment 1
[0098] 1. Measurement method
[0099] 1.1 Preparation of capture solution
[0100] Add a certain amount of 65% concentrated nitric acid, 35% concentrated hydrochloric acid, and 10.0 mg / L gold standard solution into absolute ethanol to prepare a solution containing 1-5% nitric acid, 1-3% hydrochloric acid and a gold concentration of 0.1-1.0 mg / L acidified ethanol solution, preferably prepared as an acidified ethanol solution containing 3% nitric acid, 2% hydrochloric acid and 1.0 mg / L gold concentration, stored at 0°C-4°C for 1 month.
[0101] 1.2 Preparation of standard solution
[0102] Pipette the elemental mercury, dilute it with the acidified ethanol solution containing gold prepared in 1.1 and make it to volume, and prepare the standard stock solution of elemental mercury. The mass concentration of the mercury element standard stock solution is 100.0 μg / L. Storage conditions: It can be stored for 1 month at 0-4°C.
[0103] Pipette bismuth 209 Dilute the standard subs...
Embodiment 2
[0146] 1. Measurement method
[0147] 1.1 Preparation of capture solution
[0148] With the related content of 1.1 in embodiment 1.
[0149] 1.2 Preparation of standard solution
[0150] With the related content of 1.2 in embodiment 1.
[0151] 1.3 Sample capture
[0152] Select cigarettes according to the national standard GB / T5606.1-2004 "Cigarette Part 1: Sampling", and use RM- The 20H rotating disk smoking machine was used for balance and smoking, and the acidified ethanol solution containing gold elements prepared in 1.1 was used to capture the mercury sample solution in the gas phase component of mainstream cigarette smoke. The sample capture amount is the gas phase composition of 20 cigarettes each time.
[0153] The acidified ethanol solution containing gold elements prepared in 1.1 was used to capture the mercury in the gas phase component of cigarette mainstream smoke, and two traps were connected in series, each trap was 50ml and filled with a certain amount of...
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