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Following phase separation, the supernatant organic solution was used to make nicotine working standards in concentrations of 50, 250, 500, 750, 1000 and 1500 mg/L, which were serially diluted with the extraction solution
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Mortality from chronic obstructive pulmonary disease is also very high in Hull being 90% higher than England with 87 deaths per 100,000 population in Hull compared to 46 deaths per 100,000 population for England for deaths registered during 2022-24
The addition of an e-cigarette ban to the no-smoking sign has also won recognition from the WHO