Results 41 to 50 of about 488,156 (285)

Urinary naphthalene and phenanthrene as biomarkers of occupational exposure to polycyclic aromatic hydrocarbons. [PDF]

, 2008
OBJECTIVES: The study investigated the utility of unmetabolised naphthalene (Nap) and phenanthrene (Phe) in urine as surrogates for exposures to mixtures of polycyclic aromatic hydrocarbons (PAHs).
Garshick, E, Hart, J. E., Herrick, R. F., Laden, F., McClean, M. D., Rappaport, S. M., Smith, T. J., Sobus, J. R., Waidyanatha, S., Zheng, Y.   +9 more
core   +3 more sources

Optimization of Solid Phase Microextraction Conditions for Volatile Components of Foods by Using Response Surface Methodology

Turkish Journal of Agriculture: Food Science and Technology, 2017
High vacuum steam distillation, simultaneous distillation extraction, steam distillation, purge and trap methods are used for sample preparation in volatile component analysis. Since these methods are difficult and costly to implement, these methods have
Ceyda Dadalı, Yeşim Elmacı Elmacı
doaj   +1 more source

Recent progress in solid- and liquid-phase microextraction methods for the extraction and quantification of current-use pesticides

Advances in Sample Preparation
The widespread use of pesticides has led to their pervasive presence in diverse environmental matrices such as water, air, and soil. Therefore, accurate and reliable determination of pesticides in various sample types is essential.
Seyedeh Bentolhoda Hosseinian, Milad Ghani, Jahan Bakhsh Raoof   +2 more
doaj   +1 more source

Applications of Liquid-Phase Microextraction in the Sample Preparation of Environmental Solid Samples

Molecules, 2014
Solvent extraction remains one of the fundamental sample preparation techniques in the analysis of environmental solid samples, but organic solvents are toxic and environmentally harmful, therefore one of the possible greening directions is its ...
Helena Prosen
doaj   +1 more source

An easily prepared graphene oxide-ionic liquid hybrid nanomaterial for micro-solid phase extraction and preconcentration of Hg in water samples [PDF]

, 2018
A preconcentration method based on the use of graphene oxide (GO) functionalized with an ionic liquid (IL) was developed for trace Hg determination in water samples.
Cruz Sotolongo, Annaly, Martinis, Estefanía Mabel, Wuilloud, Rodolfo German   +2 more
core   +1 more source

Determination of pesticides in the respirable fraction of airborne particulate matter by high-performance liquid chromatography–tandem mass spectrometry [PDF]

, 2017
Potential harmful effects of pesticides include risks to human health of workers involved in the wet spray application in cultivated areas. Inhalation exposure depends on several factors including pesticide concentrations in the respirable fraction of ...
Buiarelli, Francesca, Console, Carla, De Gennaro, Martina, Di Filippo, Patrizia, Laurendi, Vincenzo, Pomata, Donatella, Puri, Daniele, Riccardi, Carmela   +7 more
core   +1 more source

Metal–Organic Frameworks as Key Materials for Solid-Phase Microextraction Devices—A Review

Separations, 2019
Metal–organic frameworks (MOFs) have attracted recently considerable attention in analytical sample preparation, particularly when used as novel sorbent materials in solid-phase microextraction (SPME).
Adrián Gutiérrez-Serpa, Idaira Pacheco-Fernández, J. Pasán, V. Pino   +3 more
semanticscholar   +1 more source

Theory of Solid-Phase Microextraction [PDF]

Journal of Chromatographic Science, 2000
The main objective of this contribution is to describe the fundamental concepts associated with solid-phase microextraction (SPME). Theory provides insight when developing SPME methods and identifies parameters for rigorous control and optimization. A mathematical model has been developed to understand the principal processes of SPME by applying basic ...
openaire   +2 more sources

Electromembrane Extraction for Multiclass Pesticide Assessment in Soil Matrices: Sustainable Analytical Insights

Analysis &Sensing, EarlyView.
The U‐shaped electromembrane extraction with liquid chromatography‐mass spectrometry enables rapid multiclass pesticide screening in soil. The 15 min, low‐solvent workflow achieves high recoveries and robust linearity, while AGREEprep and GAPI assessments highlight a greener profile compared to literature reports, which represents a smart strategy for ...
Rafael O. Martins, Gabriela G. Souza, Anne Varenne, Fanny d’Orlyé, Livia F. Sgobbi, Pedro V. V. Romanholo, Maria E. C. Queiroz, Bruno J. G. Silva, Virginia Damin, Andréa R. Chaves   +9 more
wiley   +1 more source

Application of solid-phase microextraction in atomic spectrometry

Advances in Sample Preparation, 2022
With the growing requirements for the monitoring of heavy metals at an ultra-trace level in the environment and the real-time detection of toxic elements and their compounds for environmental pollution accidents, researchers devoted significant efforts ...
Yubin Su, Tian Ren, Yao Lin, Chengbin Zheng   +3 more
doaj   +1 more source