Simultaneous determination of sulfonamides and fluoroquinolones from environmental water based on magnetic double-template molecularly imprinting technique

2018 ◽  
Vol 25 (16) ◽  
pp. 16121-16134 ◽  
Author(s):  
Yang Xu ◽  
Jiangnan Li ◽  
Liyan Jiang ◽  
Zhengqiang Li ◽  
Yi Li ◽  
...  
Keyword(s):  
Simultaneous Determination ◽  
Environmental Water ◽  
Molecularly Imprinting ◽  
Water Based

A strategy of electrochemical simultaneous detection of acetaminophen and levofloxacin in water based on g-C3N4 nanosheet-doped graphene oxide

2021 ◽  
Author(s):  
Wenwen Yi ◽  
Chunxiao Han ◽  
Zhongping Li ◽  
Yujing Guo ◽  
Meng Liu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Simultaneous Determination ◽  
Carbon Nitride ◽  
Simultaneous Detection ◽  
Environmental Water ◽  
Graphitic Carbon Nitride ◽  
Water Based ◽  
Doped Graphene ◽  
Electroanalytical Method

A novel electroanalytical method for the simultaneous determination of acetaminophen (AC) and levofloxacin (LEV) in environmental water was proposed based on graphitic carbon nitride nanosheet-doped graphene oxide (CNNS/GO).

scholarly journals Fast UHPLC-MS/MS for the Simultaneous Determination of Azithromycin, Erythromycin, Fluoxetine and Sotalol in Surface Water Samples

2021 ◽  
Vol 11 (18) ◽  
pp. 8316
Author(s):  
Mira Azzi ◽  
Sylvain Ravier ◽  
Assem Elkak ◽  
Bruno Coulomb ◽  
Jean-Luc Boudenne
Keyword(s):  
Surface Water ◽  
Simultaneous Determination ◽  
Surface Waters ◽  
Water Samples ◽  
High Performance ◽  
Chemical Properties ◽  
Environmental Water ◽  
Butyl Ether ◽  
Flight Mass Spectrometry

Chromatographic development for the determination of pharmaceuticals in environmental water samples is particularly challenging when the analytes have significantly different physico-chemical properties (solubility, polarity, pKa) often requiring multiple chromatographic methods for each active component. This paper presents a method for the simultaneous determination of azithromycin, erythromycin (antibiotics), fluoxetine (anti-depressant) and sotalol (b-blocker) in surface waters by ultra-high-performance liquid chromatography coupled with ultra-high-resolution time-of-flight mass spectrometry. These pharmaceuticals—presenting a broad spectrum of polarity (0.24 ≤ log Kow ≤ 4.05)—were separated on a C-18 analytical column, after a simple filtration step for freshwater samples or after a liquid–liquid extraction with Methyl-tertio-butyl ether (MTBE) for seawater samples. The optimized separation method (in terms of nature of column and eluent, elution gradient, and of mass spectrometric parameters), enable one to reach limits of detection ranging between 2 and 7 ng L−1 and limits of quantification between 7 and 23 ng L−1 for the four targeted molecules, within a three minute run. This method was validated using samples collected from three different surface waters in Lebanon (freshwater and seawater) and analytical results were compared with those obtained in surface waters sampled in a French river, equivalent in terms of human activities. Using this method, we report the highest concentration of pharmaceuticals found in surface water (up to 377 ng L−1 and 268 ng L−1, respectively, for azithromycin and erythromycin, in the Litani river, Lebanon).

Simultaneous Determination of Trace Heavy Metals in Natural Water by Portable Metal Analyzer

2015 ◽  
Vol 1092-1093 ◽  
pp. 795-798
Author(s):  
Ying Hua Li ◽  
Lu Bai ◽  
Feng Gu ◽  
Hong Wang ◽  
Chun Ying Wu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Intermetallic Compound ◽  
Simultaneous Determination ◽  
Natural Water ◽  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Trace Heavy Metals ◽  
Anodic Stripping ◽  
Water Based

The analysis index of the portable metal analyzer for trace heavy metals in natural water based on anodic stripping voltammetry (ASV) were performed. Simultaneous determination and monovariated analysis of trace heavy metals were investigated both subsequently. The reasons of disturbance in analysis were also discussed. The addition of Ga (II) was testified that can eliminate the formation of the Cu-Zn intermetallic compound.

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