Abstract
Abstract A collaborative study was made of Schwartzman’s method for residues of nicotine in waxy crops and leafy crops. The nicotine is stripped from leafy crops with ammoniacal benzene-chloroform and from waxy crops with ammonium hydroxide, extracted with acid, and measured on an ultraviolet spectrophotometer. Average recoveries by five collaborators were 95.9% for waxy crops and 103.8% for leafy crops. It is recommended that the method be adopted as official, first action.
Keywords
Affiliated Institutions
Related Publications
Taste reactivity responses elicited by reinforcing drugs: A doseesponse analysis.
A series of 3 experiments with Sprague-Dawley rats measured taste reactivity (TR) responses elicited by sucrose that was paired on 5 occasions with various doses of d-amphetamin...
Mesolimbic Dopamine Activation—The Key to Nicotine Reinforcement?
The mesolimbic dopaminergic system appears to mediate the rewarding effects of certain stimulant drugs, such as (+)amphetamine. Autoradiographic mapping techniques have revealed...
Workplace interventions for smoking cessation
1. We found strong evidence that interventions directed towards individual smokers increase the likelihood of quitting smoking. These include individual and group counselling an...
Smoking, vaping and hospitalization for COVID-19
The study purpose was to examine the prevalence of current e-cigarette use and current smoking among hospitalized patients with COVID-19 in China, considering the high populatio...
Long-term Use of Nicotine Chewing Gum and Mercury Exposure from Dental Amalgam Fillings
In experimental studies, chewing gum has been shown to increase the release rate of mercury vapor from dental amalgam fillings. The aim of the present study was to investigate t...
Publication Info
- Year
- 1964
- Type
- article
- Volume
- 47
- Issue
- 2
- Pages
- 303-305
- Citations
- 3
- Access
- Closed
External Links
Social Impact
Social media, news, blog, policy document mentions
Citation Metrics
Cite This
Identifiers
- DOI
- 10.1093/jaoac/47.2.303