Results 11 to 20 of about 10,283,817 (273)

Virginia Water Central [PDF]

, 2014
This newsletter features articles on water-related science, policy, and law. Distributed to state agency representatives, faculty, students and interested citizens, it aims to provide current information, statistics, news, and notices related to water ...
Virginia Water Resources Research Center
core   +31 more sources

Extraction of Phthalic Acid Esters and Di(2-ethylhexyl) Adipate from Tap and Waste Water Samples Using Chromabond^® HLB as Sorbent Prior to Gas Chromatography-Mass Spectrometry Analysis

Separations, 2020
In this work, Chromabond® HLB was evaluated as an extraction sorbent of a group of seven phthalic acid esters (PAEs; i.e., dipropyl phthalate, DPP, dibutyl phthalate, DBP, diisopentyl phthalate, DIPP, di-n-pentyl phthalate, DNPP, butylbenzyl phthalate ...
Cecilia Ortega-Zamora, Javier González-Sálamo, Diana Angélica Varela-Martínez, Miguel Ángel González-Curbelo, Javier Hernández-Borges   +4 more
doaj   +1 more source

A Deferasirox Derivative That Acts as a Multifaceted Platform for the Detection and Quantification of Fe³⁺

Chemosensors, 2021
Here, we report that ExSO3H, a synthetically accessible, water-soluble, non-toxic derivative of the clinical iron chelator deferasirox, acts as a colorimetric chemosensor that permits the detection and quantification of Fe3+ in aqueous samples at pH 2–5.
Axel Steinbrueck, Adam C. Sedgwick, Suh-Mi Hwang, Sajal Sen, Michael Y. Zhao, Dan-Ying Huang, Daniel M. Knoll, Yu-Ying Wang, Jonathan L. Sessler   +8 more
doaj   +1 more source

Quantification of Trace Mercury in Water: Solving the Problem of Adsorption, Sample Preservation, and Cross‐Contamination

Global Challenges, 2020
Adsorption, sample preservation, and cross‐contamination are the major impediments to the accurate and sensitive analysis of low‐level mercury samples. Common measures to deal with this issue are to use Teflon, quartz, or borosilicate glass bottles for ...
Jingqi Zhang, Jingbo Chao, Yang Tang, Pingyu Wan, Xiao Jin Yang, Choon Wong, Mark Bruce, Qing Hu   +7 more
doaj   +1 more source

Dual Detection of the Chytrid Fungi Batrachochytrium spp. with an Enhanced Environmental DNA Approach

Journal of Fungi, 2021
Environmental DNA (eDNA) is becoming an indispensable tool in biodiversity monitoring, including the monitoring of invasive species and pathogens. Aquatic chytrid fungi Batrachochytrium dendrobatidis (Bd) and B.
David Lastra González, Vojtech Baláž, Jiří Vojar, Petr Chajma   +3 more
doaj   +1 more source

Spectrophotometric Determination of Dimethindene in Pharmecutical Preparations and Water Samples [PDF]

مجلة التربية والعلم, 1999
A simple, accurate, rapid and sensitive visible spectrophotometric method has been developed for the determination of dimethindene in pure and pharmaceutical preparations. The method is based on the reaction of dimethindene with potassium permanganate in
Nief Ahmed
doaj   +1 more source

Improvement in the Chromium(VI)-Diphenylcarbazide Determination Using Cloud Point Microextraction; Speciation of Chromium at Low Levels in Water Samples

Molecules, 2023
A reliable, rapid, and low-cost procedure for determining very low concentrations of hexavalent chromium (Cr) in water is discussed. The procedure is based in the classical reaction of Cr6+ with diphenylcarbazide.
Begoña A. Mouco-Novegil, Manuel Hernández-Córdoba, Ignacio López-García   +2 more
doaj   +1 more source

Spectrophotometric Determination of Trace Concentrations of Copper in Waters Using the Chromogenic Reagent 4-Amino-3-Mercapto-6-[2-(2-Thienyl)Vinyl]-1,2,4-Triazin-5(4H)-One: Synthesis, Characterization, and Analytical Applications

Applied Sciences, 2020
A simple, selective, and inexpensive spectrophotometric method is described in the present study for estimation of trace concentrations of Cu2+ in water based on its reaction with chromogenic reagent namely 4-amino-3-mercapto-6-[2-(2-thienyl)vinyl]-1,2,4-
Salman. S. Alharthi, Hamed. M. Al-Saidi
doaj   +1 more source

Determination of cobalt in natural water samples after separation and preconcentration by dispersive liquid-liquid microextraction based on the solidification of floating organic drop [PDF]

شیمی کاربردی روز, 2012
A simple, rapid and environmentally friendly method has been developed for the determination of cobalt ions in water samples by dispersive liquid–liquid microextraction based on the solidification of floating organic droplet (DLLME-SFO) coupled with ...
Mohammad Reza Jamali, Salah Rahimpour, Reyhaneh Rahnama   +2 more
doaj   +1 more source

Water Sampling Module for Collecting and Concentrating Legionella pneumophila from Low-to-Medium Contaminated Environment

Biosensors, 2021
The detection of water contamination with Legionella pneumophila is of critical importance to manufacturers of water processing equipment and public health entities dealing with water networks and distribution systems.
Khalid Moumanis, Lilian Sirbu, Walid Mohamed Hassen, Eric Frost, Lydston Rodrigues de Carvalho, Pierre Hiernaux, Jan Jerzy Dubowski   +6 more
doaj   +1 more source