On-line separation and preconcentration of hexavalent chromium on a novel mesoporous silica adsorbent with determination by solution-cathode glow discharge-atomic emission spectrometry

2014 ◽  
Vol 29 (12) ◽  
pp. 2315-2322 ◽  
Author(s):  
Jiaxian Ma ◽  
Zheng Wang ◽  
Qing Li ◽  
Rongyin Gai ◽  
Xiaohong Li
Keyword(s):  
Hexavalent Chromium ◽  
Low Cost ◽  
Speciation Analysis ◽  
Atomic Emission ◽  
Emission Spectrometry ◽  
Separation And Preconcentration ◽  
Silica Adsorbent ◽  
On Line ◽  
Line Separation

A simple, low cost, and accurate speciation analysis method based on on-line SPE and SCGD-AES was developed for the determination of hexavalent chromium in aqueous samples.

scholarly journals On-Line Separation and Determination of Trivalent and Hexavalent Chromium with a New Liquid Membrane Annular Contactor Coupled to Inductively Coupled Plasma Optical Emission Spectrometry

Processes ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 536
Author(s):  
Maria Luisa Astolfi ◽  
Domenico Ginese ◽  
Riccardo Ferrante ◽  
Elisabetta Marconi ◽  
Anna Maria Girelli ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Inductively Coupled Plasma ◽  
Liquid Membrane ◽  
Tap Water ◽  
Optical Emission ◽  
Emission Spectrometry ◽  
Inductively Coupled ◽  
On Line ◽  
Line Separation

We describe a new on-line sensitive and selective procedure for the determination of trivalent and hexavalent chromium in liquid samples by a tailor-made contactor (TMC), specifically a liquid membrane annular TMC, coupled with inductively coupled plasma with optical detection. The TMC was designed and developed to integrate the extraction and stripping phases of the analyte in one module to minimize the membrane solvent’s consumption and maximize the speed of transport through the liquid membrane. Moreover, the particular geometry studied, which consists of two coaxial hollow fibers, allows the TMC to be used for both separating and preconcentrating purposes. Both (−)-N-dodecyl-N-methylephedrinium bromide (30 mM) in dichloroethane and HNO3 (0.75 M) were used as the liquid membrane and receiving solution, respectively. The proposed method’s performance was evaluated in terms of the hexavalent chromium extraction efficiency and the coefficient of variation percentages; these were higher than 85% and less than 5%, respectively. In addition, the proposed procedure was applied to two real samples: a tap water sample and an eluate from solid urban waste. In both cases, the analytical performances were good and comparable to those obtained using synthetic standard solutions.

An on-line matrix separation and preconcentration procedure for ICP-OES determination of Cd, Co, Cu, Mn and Pb traces in Zr and Zr-Nb alloys using a cation-exchange resin microcolumn

2021 ◽  
Author(s):  
Masoud Aghahoseini ◽  
Gholamhassan Azimi ◽  
M. K. Amini
Keyword(s):  
Inductively Coupled Plasma ◽  
Cation Exchange Resin ◽  
Optical Emission ◽  
Emission Spectrometry ◽  
Icp Oes ◽  
Inductively Coupled ◽  
Separation And Preconcentration ◽  
On Line ◽  
Plasma Optical Emission Spectrometry

Determination of traces of Cd, Co, Cu, Mn and Pb elements in zirconium and its alloys by inductively coupled plasma optical emission spectrometry (ICP OES) suffers from severe spectral interferences...

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