The time dependence of the Fourier transform infrared spectrometry (FT-IR) spectra due to the reaction of propanal (123386) and pentanal (110623) with 2-(hydroxymethyl)piperidine and the reaction of pentanal with 2-(ethyl)piperidine were studied. The time resolved FT-IR/attenuated total reflectance attachment (ATR) spectra showed that an oxazolidine derivative was not formed in the initial reaction of the aldehydes with 2-(hydroxymethyl)piperidine. Instead a stable hemiaminal intermediate was noted at the gas/solid interface. In solution this hemiaminal may undergo dehydration to produce an enamine product which is stable. Only after desorption of the intermediate from the sorbent and exposure of the mixture to ultrasound treatment was an oxazolidine formed. In an effort to understand more fully how the coated sorbent interacted with the analyte the contributions of the interplay of adsorption kinetics, reaction rates, and aldehyde volatility must be evaluated.
We take your privacy seriously. You can review and change the way we collect information below.
These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us to know which pages are the most and least popular and see how visitors move around the site. All information these cookies collect is aggregated and therefore anonymous. If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance.
Cookies used to make website functionality more relevant to you. These cookies perform functions like remembering presentation options or choices and, in some cases, delivery of web content that based on self-identified area of interests.
Cookies used to track the effectiveness of CDC public health campaigns through clickthrough data.
Cookies used to enable you to share pages and content that you find interesting on CDC.gov through third party social networking and other websites. These cookies may also be used for advertising purposes by these third parties.