Molecular characterization of sulfur-containing compounds in petroleum

Y Han, Y Zhang, C Xu, CS Hsu - Fuel, 2018 - Elsevier
Sulfur-containing compounds (SCCs) are the most abundant heteroatom compounds in
petroleum. The characterization of SCCs in crude oils and petroleum products has great …

[PDF][PDF] Chemometrics in analytical chemistry–an overview of applications from 2014 to 2018

MC Santos, PAM Nascimento, WN Guedes… - Eclética …, 2019 - redalyc.org
A compilation of papers published between 2014 and 2018 was evaluated. Many papers
related to multivariate calibration and classification have been reported, as well as, design of …

ATR-FTIR spectroscopy combined with chemometric methods for the classification of polyethylene residues containing different contaminants

DJ da Silva, H Wiebeck - Journal of Polymers and the Environment, 2022 - Springer
Low density polyethylene (LDPE) and high density polyethylene (HDPE) are the principal
plastics present in solid plastic waste and are found out as the main components of …

[HTML][HTML] Discrimination of oils and fuels using a portable NIR spectrometer

FD Santos, LP Santos, PHP Cunha, FT Borghi… - Fuel, 2021 - Elsevier
Improper mixtures of: motor oil with crude oil; and derivatives mixed with other derivatives of
lesser commercial value were identified in Brazil by companies in the energy sector. This …

Applying confocal Raman spectroscopy and different linear multivariate analyses to sort polyethylene residues

DJ da Silva, DF Parra, H Wiebeck - Chemical Engineering Journal, 2021 - Elsevier
Abstract High-Density Polyethylene (HDPE), Low-Density Polyethylene (LDPE),
Polypropylene (PP), and recycled Poly (Ethylene Terephthalate)(PET) are widely applied as …

Using PLS, iPLS and siPLS linear regressions to determine the composition of LDPE/HDPE blends: a comparison between confocal Raman and ATR-FTIR …

DJ da Silva, H Wiebeck - Vibrational Spectroscopy, 2017 - Elsevier
Polyethylenes can be distinguished from each other by branching degree and molar mass,
which cause significant changes in their properties, rheological and thermal behaviors …

A novel integrated approach to characterization of petroleum naphtha properties from near-infrared spectroscopy

H Yu, W Du, ZQ Lang, K Wang… - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
This article presents a study about the rapid characterization of petroleum naphtha
properties based on near-infrared (NIR) spectroscopy. The major challenge of this problem …

Predicting heavy metals in dark sun-cured tobacco by near-infrared spectroscopy modeling based on the optimized variable selections

Y Huang, G Du, Y Ma, J Zhou - Industrial Crops and Products, 2021 - Elsevier
As a product absorbed by human body, the safety of cigarettes highly depends on the quality
of tobacco (Nicotiana tabacum L.) raw materials. The heavy metal is an important indicator of …

[HTML][HTML] Predicting LDPE/HDPE blend composition by CARS-PLS regression and confocal Raman spectroscopy

DJ Silva, H Wiebeck - Polímeros, 2019 - SciELO Brasil
Industries and the scientific community currently focus on creating new ways to recycle and
to reuse polymer waste that leads to serious socio-environmental risks. However, the quality …

Exploring the use of Near-infrared spectroscopy as a tool to predict quality attributes in prickly pear (Rosa roxburghii Tratt) with chemometrics variable strategy

F Zhao, G Du, Y Huang - Journal of Food Composition and Analysis, 2022 - Elsevier
Abstract Prickly pear (Rosa roxburghii Tratt) is a regional deciduous shrub fruit that grows in
southwestern China. The total flavonoids and vitamin C rich in prickly pear are important …