Flow injection analysis of water. Part 1: Automatic preconcentration determination of sulphate, ammonia and iron(II)/iron(III)

This paper describes a simple flow-injection (FI) manifold for the determination of a variety of species in industrial water. The chemical systems involved in the determination of ammonia (formation of Indophenol Blue), sulfate (precipitation with Ba(II)), and iron (complexation with 1,10-phenanthroline with the help of a prior redox reaction for speciation) were selected so that a common manifold could be used for the sequential determination of batches of each analyte. A microcolumn of a suitable ion exchange material was used for on-line preconcentration of each analyte prior to injection; linear ranges for the determination of the analytes at the ng/ml levels were obtained with good reproducibility. The manifold and methods are ready for full automation.

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Chemical Analysis through CL-Detection Assisted by Periodate Oxidation

Bioinorganic Chemistry and Applications ◽

10.1155/2007/92595 ◽

2007 ◽

Vol 2007 ◽

pp. 1-10 ◽

Cited By ~ 7

Author(s):

Nicholaos P. Evmiridis ◽

Athanasios G. Vlessidis ◽

Nicholas C. Thanasoulias

Keyword(s):

Chemical Analysis ◽

Flow Injection ◽

Research Work ◽

Periodate Oxidation ◽

Direct Determination ◽

Good Reproducibility ◽

Through Flow ◽

Set Up ◽

Simple Flow

The progress of the research work of the author and his colleagues on the field of CL-emission generated by pyrogallol oxidation and further application for the direct determination of periodate and indirect or direct determination of other compounds through flow-injection manifold/CL-detection set up is described. The instrumentation used for these studies was a simple flow-injection manifold that provides good reproducibility, coupled to a red sensitive photomultiplier that gives sensitive CL-detection. In addition, recent reports on studies and analytical methods based on CL-emission generated by periodate oxidation by other authors are included.

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A Simple Flow Injection Sensing System for the Real-Time On-Line Determination of Chemical Oxygen Demand Based on 3D Au-NPs/TiO2 Nanotube Arrays

Frontiers in Materials ◽

10.3389/fmats.2019.00238 ◽

2019 ◽

Vol 6 ◽

Cited By ~ 1

Author(s):

Hewei Si ◽

Xidong Zhang ◽

Shiwei Lin

Keyword(s):

Chemical Oxygen Demand ◽

Real Time ◽

Flow Injection ◽

Oxygen Demand ◽

Nanotube Arrays ◽

Au Nps ◽

Sensing System ◽

On Line ◽

Simple Flow

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A Flow-Injection On-line Solid Phase Extraction, Enrichment System for Determination of Melamine in Milk Products Based on High Performance Liquid Chromatography

CHINESE JOURNAL OF ANALYTICAL CHEMISTRY (CHINESE VERSION) ◽

10.3724/sp.j.1096.2012.10709 ◽

2012 ◽

Vol 40 (2) ◽

pp. 298 ◽

Cited By ~ 1

Author(s):

Yong-Sheng LI ◽

Qin-Qin LIANG ◽

Yan-Qiu HOU ◽

Hong-Xing LI

Keyword(s):

High Performance Liquid Chromatography ◽

Liquid Chromatography ◽

Solid Phase Extraction ◽

Flow Injection ◽

High Performance ◽

Solid Phase ◽

Phase Extraction ◽

Milk Products ◽

On Line

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Flow Injection Hydride Generation and On-line W-Coil Trapping for Electrothermal Vaporization Dielectric Barrier Discharge Atomic Emission Spectrometric Determination of Trace Cadmium

Talanta ◽

10.1016/j.talanta.2021.122516 ◽

2021 ◽

pp. 122516

Author(s):

Yujia Deng ◽

Kai Li ◽

Xiandeng Hou ◽

Xiaoming Jiang

Keyword(s):

Dielectric Barrier Discharge ◽

Flow Injection ◽

Barrier Discharge ◽

Hydride Generation ◽

Atomic Emission ◽

Electrothermal Vaporization ◽

Dielectric Barrier ◽

On Line ◽

Trace Cadmium

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Comparison of Flow Injection-MS/MS and LC-MS/MS for the Determination of Ochratoxin A

Toxins ◽

10.3390/toxins13080547 ◽

2021 ◽

Vol 13 (8) ◽

pp. 547

Author(s):

Kai Zhang

Keyword(s):

Ochratoxin A ◽

Flow Injection ◽

Internal Standard ◽

Grape Juice ◽

Tandem Mass ◽

Triple Quadrupole ◽

On Line ◽

Red Grape Juice ◽

Red Grape

Two methods for measuring ochratoxin A in corn, oat, and grape juice were developed and compared. Flow injection (FI) and on-line liquid chromatography (LC) performances were evaluated separately, with both methods using a triple quadrupole tandem mass spectrometer (MS/MS) for quantitation. Samples were fortified with 13C uniformly labeled ochratoxin A as the internal standard (13C-IS) and prepared by dilution and filtration, followed by FI- and LC-MS/MS analysis. For the LC-MS/MS method, which had a 10 min run time/sample, recoveries of ochratoxin A fortified at 1, 5, 20, and 100 ppb in corn, oat, red grape juice, and white grape juice ranged from 100% to 117% with RSDs < 9%. The analysis time of the FI-MS/MS method was <60 s/sample, however, the method could not detect ochratoxin A at the lowest fortification concentration, 1 ppb, in all tested matrix sources. At 5, 20, and 100 ppb, recoveries by FI-MS/MS ranged from 79 to 117% with RSDs < 15%. The FI-MS/MS method also had ~5× higher solvent and matrix-dependent instrument detection limits (0.12–0.35 ppb) compared to the LC-MS/MS method (0.02–0.06 ppb). In the analysis of incurred corn and oat samples, both methods generated comparable results within ±20% of reference values, however, the FI-MS/MS method failed to determine ochratoxin A in two incurred wheat flour samples due to co-eluted interferences due to the lack of chromatographic separation.

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