COA of Formula: C22H43NOIn 2022, Chen, Zhi-Feng;Lin, Qin-Bao;Dong, Ben;Zhong, Huai-Ning;Wang, Zhi-Wei published 《Comparison of the ability of UV-Vis and UPLC-Q-TOF-MS combined with chemometrics to discriminate recycled and virgin polyethylene》. 《Journal of Hazardous Materials》published the findings. The article contains the following contents:
A growing attention is attracted to the use of recycled plastics as food contact materials, and its chem. safety research and discrimination approach are indispensable. In current study, UV-visible spectrometry (UV-Vis) and ultra-performance liquid chromatog. quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MS) were used to provide spectral and mass fingerprinting for polyethylene (PE). Coupling with chemometrics, two methods were developed to discriminate recycled and virgin PE. UV-Vis combined with chemometrics could be a more accessible, simpler and faster approach. 237-331 nm in UV spectrum was regarded as marker region selected by orthogonal partial least-squares discrimination anal. (OPLS-DA) and the accuracy of both calibration and validation set could reach 100% in linear discrimination anal. (LDA) based on this region. Besides, 2314 ions were detected by UPLC-Q-TOF-MS and processed by MS-DIAL. 48 candidate chems. were identified, including ketone, esters, carboxylic acid, alcs. and phenols, amine, nitriles, aldehydes and others. Possible origins of these compounds could be classified as plastic, food, drug, cosmetics and pesticide related. Many of these compounds are highly toxic, especially pesticide related, indicating that recycling in closed loop or sorting by the recycled plastic articles is very necessary if the recycled PE is going to be used as food contact material. To complete the study, the researchers used cis-13-Docosenamide (cas: 112-84-5) .
cis-13-Docosenoamide(cas: 112-84-5) is a primary fatty amide resulting from the formal condensation of the carboxy group of erucic acid with ammonia.COA of Formula: C22H43NO It has a role as a human metabolite, a rat metabolite, a mammalian metabolite, a plant metabolite and an EC 3.1.1.7 (acetylcholinesterase) inhibitor.
Reference:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics